Bibliografias temáticas / Powder in suspension

Literatura científica selecionada sobre o tema "Powder in suspension"

Autor: Grafiati

Publicado: 22 de junho de 2024

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Artigos de revistas sobre o assunto "Powder in suspension":

Zhou, Hai Fang, Xiao Xiang Wang e Ri Zhi Wang. "Electrophoretic Deposition of Nacre Coatings on Titanium Substrates". Key Engineering Materials 309-311 (maio de 2006): 747–50. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.747.

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Nacre powder suspensions in alcohol added with acetic acid (Suspension I) or calcium chloride (Suspension II) were prepared. Titanium substrates were coated with nacre powder by EPD in the suspensions. The result shows that Suspension II is more stable than Suspension I, and deposition rate in Suspension II is much higher than that in Suspension I. XRD and FTIR results show that the nacre coatings exhibit the same characteristics as the raw nacre powder. SEM morphologies show that uniform coatings are achieved. Scratch test shows that bonding strength of coatings from Suspension I is much higher than that of Suspension II. The higher bonding strength from Suspension I was confirmed to be closely related to the concurrent deposition of organic molecules dissolved in the suspension.

Ahmed, Yasser, Emad Ewais e Said El-Sheikh. "Effect of dispersion parameters on the consolidation of starch-loaded hydroxyapatite slurry". Processing and Application of Ceramics 8, n.º 3 (2014): 127–35. http://dx.doi.org/10.2298/pac1403127a.

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The influence of some parameters controlling the hydroxyapatite (HA) suspension rheology in terms of heat treatment of the HA powder prior to suspension preparation, suspension solid loading and the amount of corn starch addition was thoroughly investigated. The heat treatment of powder at 1100?C prior to suspension preparation was found to be extremely efficient in preparing suspensions with high solid loading of 59 vol.%. In contrast, the highest solid loading that could be developed from the non-heat treated powder was 14 vol.%. This phenomenon is consequence of the changes in the physical and chemical properties of the powder after the heat treatment step. The amount of native corn starch addition has ranged from 10 to 40 vol.%. The addition of corn starch leads to the high retardation in the suspension viscosity, particularly at low shear rate. On the contrary, at higher shear rate the situation is completely different. The properties of the consolidated green sample (produced from suspensions containing various corn starch amounts) in terms of relative density and compressive strength were studied. The results indicated that even though there were no considerable changes in the relative density, the compressive strength was sharply increased with increasing starch amount content until it reached a maximum at 30 vol.% and then decreased thereafter.

Bhandare, P. S., e A. V. Yadav. "A REVIEW ON “DRY SYRUPS FOR PAEDIATRICS”". International Journal of Current Pharmaceutical Research 9, n.º 1 (31 de dezembro de 2016): 25. http://dx.doi.org/10.22159/ijcpr.2017v9i1.16789.

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Suspensions may be defined as preparations containing finely divided drug particles (the suspensoid) distributed somewhat uniformly throughout a vehicle with or without stabilizers and other additives in which drug exhibits a minimum degree of solubility hence conventional oral suspension can be administered immediately (ready to use form) and not requiring reconstitution at the time of dispensing are simply designated as “Oral Suspension”.There is an important category of suspension that are available as dry powders intended for suspension in liquid vehicles. These are dry mixtures containing the drug and suitable suspending and dispersing agents to be diluted and agitated with a specific quantity of vehicle, most often purified water. Drugs that are instable if maintained for extended periods in the presence of aqueous vehicle (eg., many antibiotic drugs) are frequently supplied as dry powder mixtures for reconstitution at the time of dispensing. This type of preparation is designated in the USP by a title “for Oral Suspension”. The reconstituted system is the formulation of choice when the drug stability is a major concern. After reconstitution, these systems have a short but acceptable life if stored at refrigerator temperatures. Reconstitutable oral systems show the adequate chemical stability of the drug during shelf life, avoids the physical stability problems related to solubility, pH and incompatibilities with other ingredients and also reduce the weight of the final product because the aqueous vehicle is absent and consequently the transportation expenses may be reduced.Dry syrup form of the drug is also useful in case of bioavailability as it has high bioavailability rather than tablets and capsules as it disintegrates in water outside of the oral cavity and directly the suspension is gone through the gastrointestinal tract. So the suspension easily absorbs in the GIT.A number of commercial and official preparations are available as dry powder mixtures. The present review gives an account of the excipients used, methods of preparation of dry syrups along with their evaluations, their packaging, examples of research articles, few marketed preparations.

Muchtar, Andanastuti, Norazmira Wati e Nor Azri Jaafar. "Deagglomeration of High Purity Fine Alumina Powder via pH Control". ASEAN Journal of Chemical Engineering 2, n.º 1 (20 de outubro de 2008): 55. http://dx.doi.org/10.22146/ajche.50803.

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This paper presents results from a study on the effect of the pH of suspensions on the deagglomeration of a high-purity (99.99%), fine-grained alumina powder. The pH of the suspension was varied between pH 2 and 3. It is the aim of the study to determine the best pH for a successful dispersion of the alumina powders in the suspension. A series of rheological studies and analytical work under Scanning Electron Microscopy were conducted. It was found that the best pH was pH 2. Data obtained from rheological studies using a viscometer showed that the alumina suspension prepared at pH 2 was least viscous, which may be taken as a negative indicator of the presence of agglomerates. This hypothesis is validated by visual inspection using SEM. For the pH 2 samples, a successful removal of the agglomerates in the green compact has encouraged the sinterability of the samples and thus, resulted in an earlier sintering process at a low-firing temperature. In addition, the sintering characteristics and microstructures of the samples prepared with a pH 2 suspension are also presented.

Kai Jian, Ding. "Ultraprecise weight feed at batching of nanopowder materials". Interactive science, n.º 9 (85) (30 de novembro de 2023): 70–72. http://dx.doi.org/10.21661/r-560327.

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In the article the current ways and the equipment for batching of powder шmaterials are considered. On the basis of an estimation of volume feeders accuracy authors revealed a necessity of use instead of them weight feeders: vibratory feeders or feeders of a suspension of powders in gas. There is perspective to use of feeders of suspensions of powders in gases for batching of ultra tiny portions of powders.

Hodgson, Daniel J. M., Michiel Hermes, Elena Blanco e Wilson C. K. Poon. "Granulation and suspension rheology: A unified treatment". Journal of Rheology 66, n.º 5 (setembro de 2022): 853–58. http://dx.doi.org/10.1122/8.0000515.

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Mixing a small amount of liquid into a powder can give rise to dry-looking granules; increasing the amount of liquid eventually produces a flowing suspension. We perform experiments on these phenomena using Spheriglass, an industrially realistic model powder. Drawing on recent advances in understanding friction-induced shear thickening and jamming in suspensions, we offer a unified description of granulation and suspension rheology. A “liquid incorporation phase diagram” explains the existence of permanent and transient granules and the increase of granule size with liquid content. Our results point to rheology-based design principles for industrial granulation.

&NA;. "Omeprazole/Antacid-Powder Suspension ??? Santarus". Drugs in R & D 5, n.º 4 (2004): 234–35. http://dx.doi.org/10.2165/00126839-200405040-00010.

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&NA;. "Omeprazole/Antacid-Powder Suspension ??? Santarus". Drugs in R & D 5, n.º 6 (2004): 349–50. http://dx.doi.org/10.2165/00126839-200405060-00007.

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Kobayashi, Motoyoshi, Takuya Sugimoto, Shunsuke Sato e Ryouichi Ishibashi. "Climbing Colloidal Suspension". Liquids 3, n.º 1 (2 de janeiro de 2023): 40–47. http://dx.doi.org/10.3390/liquids3010004.

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Mixtures of powder and liquid are ubiquitous in nature as well as industries and exhibit complex flowing and deforming behaviors, including sol to gel transition under shear stress. In order to better understand the characteristic features of this type of mixture, we observed the behavior of a mixture of colloidal silica particles and water as a model system under vibration. The mixture showed different states, from powder-like to viscous fluid-like, with increasing content of water. At certain concentrations of silica particles (around 70 wt. %) and under relatively faster vibration (over 17 Hz), we observed that the colloidal suspension of silica particles and water climbed up the wall of a container against gravity. The main purpose of this paper is to report how we can observe the climbing suspension of colloidal silica. The rheological measurements of the climbing suspension demonstrated that the climbing suspension showed shear-thickening behavior, where force chain networks and normal stress differences are considered to develop. Therefore, we speculate that the transient formation and breaking of force networks and normal stress differences under vibration contribute to the occurrence of the climbing suspension. The tunable nature of colloidal suspensions may help to elucidate the climbing mechanism in the future.

Van der Biest, Omer, L. Vandeperre, Stijn Put, Guy Anné e Jef Vleugels. "Laminated and Functionally Graded Ceramics by Electrophoretic Deposition". Key Engineering Materials 333 (março de 2007): 49–58. http://dx.doi.org/10.4028/www.scientific.net/kem.333.49.

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Electrophoresis is the effect that when an electric field is applied to a suspension of a powder in a liquid, the powder particles move under influence of this field. Frequently the powder particles also deposit at one of the electrodes. The form of the electrode determines the form of the deposit, hence shaping is possible. The current insights into the science and technology of electrophoretic deposition (EPD) will be summarized. EPD is well suited for shaping layered microstructures (laminates), by simply changing repeatedly between two or more suspensions during deposition. Tubular laminates consisting of silicon carbide layers and crack deflecting graphite interlayers have been produced. These tubes demonstrate an enhanced fracture energy and a gradual mode of failure. Another area of advanced ceramics where the use of EPD makes sense are functionally graded materials (FGM) in which one tries to combine in one component high hardness and high toughness. EPD allows the formation of FGM by depositing from a powder suspension to which a second suspension is continuously added during the process. An example will be shown of a graded WC-Co hardmetal.

Mais fontes

Teses / dissertações sobre o assunto "Powder in suspension":

Lewis, Paul O., David B. Cluck, Jessica D. Huffman, Amanda P. Ogle e Stacy D. Brown. "Stability of a Pyrimethamine Suspension Compounded from Bulk Powder". Digital Commons @ East Tennessee State University, 2017. https://doi.org/10.2146/ajhp160551.

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Purpose:Development of a stability-indicating high-performance liquid chromatography (HPLC) method for pyrimethamine analysis, with subsequent application of that method to assess the 90-day stability of a pyrimethamine suspension compounded from bulk USP-grade pyrimethamine powder, is described. Methods:A stability-indicating method of HPLC with ultraviolet detection specific to pyrimethamine was developed according to pharmacopeial recommendations and validated. The method was applied to investigate the stability of a 2-mg/mL pyrimethamine suspension in a vehicle consisting of Ora-Plus and Ora-Sweet (Perrigo) over a period of 90 days. Three replicate test preparations were stored at room temperature or refrigerated at 4.3–5.2 °C, and samples were analyzed in duplicate immediately after preparation and on study days 1, 2, 4, 7, 10, 14, 21, 30, 48, 60, 75, and 90. Results:The 2-mg/mL suspension of pyrimethamine in Ora-Plus and Ora-Sweet retained 90–110% of the labeled potency to 90 days at both temperature ranges. However, color changes in the samples stored at room temperature observed at day 60 indicated that a beyond-use date less than 90 days from the preparation date should be specified when the suspension is to be stored at room temperature. Conclusion:The study demonstrated that USP-grade pyrimethamine powder can be formulated as a 2-mg/mL suspension in a vehicle of Ora-Plus and Ora-Sweet and is stable when stored at room temperature and when refrigerated, in amber plastic bottles, for 48 and 90 days, respectively.

Wattieaux, Gaëtan. "Détection et métrologie de nanoparticules en suspension dans un plasma froid basse pression". Thesis, Orléans, 2010. http://www.theses.fr/2010ORLE2080.

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Face au développement actuel des nanotechnologies il apparaît important de pouvoir contrôler la taille des nano-objets mis en oeuvre par les industriels aussi bien pour la qualité des produits manufacturés que pour la sécurité des personnes et la protection de l'environnement. Le travail qui a été accompli au cours de cette thèse concernait la recherche de solutions innovantes pour mesurer la taille de nanoparticules en voie sèche. Pour cela nous nous sommes plus particulièrement concentrés sur la physique des plasmas poudreux. En effet l'utilisation d'un plasma permet de favoriser la désagglomération de l'échantillon de poudre que l'on souhaite caractériser et la présence de poussières dans un plasma modifie sensiblement les caractéristiques électriques de ce dernier. Nous avons montré dans un premier temps qu'il est possible de déterminer la taille moyenne de poussières piégées dans une décharge capacitive RF à basse pression à partir de la mesure de la variation des paramètres électriques de cette dernière quand de la poudre s'y forme ou y est injectée. Nous avons également développé une nouvelle technique de granulométrie par sédimentation à basse pression et assistée par plasma. Cette technique consiste à disperser l'échantillon de poudre en l'injectant dans un plasma puis à en déduire sa taille à partir de la mesure de sa vitesse de sédimentation après l'extinction du plasma. Ainsi, il est possible de déterminer la fonction de distribution en taille de l'échantillon de poudre que l'on analyse. Le système que nous avons conçu a été utilisé avec succès pour contrôler en temps réel une ligne de production de nanopoudres au CEA Saclay
The recent development of nanotechnology has made nanoparticle sizing more and more important for the quality of manufactured products as well as for human health and environmental protection. The aim of this thesis was to look for innovative solutions to measure the size and the concentration of nanoparticles in dry environnement. To meet this requirement we focused on the physics of dusty plasmas because the desagglomeration of a powder sample is enhanced when it is exposed to a plasma and the dusts modify signifcantly the electrical properties of the plasma where they are trapped. The first result of this work is the determination of the mean size of dusts that are injected or formed in a RF low pressure capacitive discharge from the variations of the electrical parameters of the plasma and of the discharge. A new particle sizing technique has also been developed. It consists of determining the powder size distribution from the measurement of its sedimentation speed following the extinction of the discharge. The system that has been designed was successfully used to monitor in real time a nanopowder production line based at the CEA Saclay

De, Villiers Janene Oosthuizen. "Combination antiretroviral therapy : formulation of a powder for oral suspension containing Lamivudine, Zidovudine and Nevirapine / Janene Oosthuizen de Villiers". Thesis, North-West University, 2006. http://hdl.handle.net/10394/15.

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Ravaux, Alice. "Réalisation et étude de dépôts composites multi-échelle élaborés par projection plasma pour applications tribologiques à hautes températures". Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0077/document.

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L’impact énergétique de la tribologie sur la vie économique et industrielle est important ; diminuer le frottement et l’usure des pièces mécaniques est un véritable enjeu pour des secteurs industriels très divers. Cette étude s’inscrit dans le cadre de la prévention de l’usure d’éléments mécaniques pouvant être soumis à des conditions sévères d’utilisation telles que les hautes températures. La réalisation de revêtements protecteurs céramique-métal est alors particulièrement indiquée afin d’apporter respectivement la résistance à la corrosion induite par les hautes températures avec un alliage adapté, et la résistance à l’usure grâce à la dureté des céramiques. D’autre part, le développement des recherches dans le domaine nanométrique a montré l’intérêt de la diminution de l’échelle sur l’amélioration des propriétés tribologique globales des revêtements. La projection thermique regroupe alors les procédés les plus adaptés à la réalisation de tels revêtements. Dans ce travail, des revêtements multi-composants (céramique-métal) et multi-échelles (micrométrique-nanométrique) sont développés par projection plasma afin de répondre à la problématique de résistance tribologique à haute température. La réalisation des dépôts est mise en œuvre à l’aide d’une torche tri-cathodes (TriplexPro-200) avantageuse pour sa stabilité et les larges possibilités laissées par sa fenêtre opératoire étendue. Les spécificités de cette torche seront étudiées afin d’adapter au mieux le procédé à la réalisation complexe de dépôts à composante multi-échelle. Une démarche innovante de projection hybride associant projection de poudres micrométriques et de suspensions de poudres nanométriques sera alors développée. Les étapes ayant amenées à la réalisation de ces revêtements sont détaillées dans ce travail puis les caractéristiques et le comportement tribologique des dépôts sont finalement étudiés
Nowadays, tribology has a high energetic impact on economic and industrial areas. Thus, reducing wear and friction of mechanical parts has become a real stakes for various industries. This study is focused on the wear prevention of mechanical parts subjected to severe operating conditions like high temperatures.The realization of protective ceramic-metal coatings is thus particularly appropriated to improve corrosion resistance induced by the high temperatures, with a suitable alloy, and the wear resistance, thanks to the ceramics hardness. Furthermore, researches development in the nanoscale field have shown the interest of scale reduction on the improvement of coatings tribological properties. Thermal spraying is then the most appropriate process for the realization of such coatings.In this work, multi-components (ceramic-metal) and multi-scales (micrometric-nanometric) coatings are developed by plasma spraying in order to give an answer to the high temperature tribological resistance issue. Coatings are realized using a three-cathodes plasma gun (TriplexPro-200) which provides a more stable plasma jet and offers wide possibilities by an extended operating window. First, the special features of this kind of plasma gun will be studied in order to adjust the process to the complex realization of multi-scale coatings. An innovative approach using a hybrid spraying process was thus developed, combining conventional micrometric powder spraying and suspension of nanoscale powders spraying. In a second time, the steps leading to the production of such coatings will be detailed, and finally, their main properties and their tribological behavior will be studied

Boissière, Benjamin. "Étude hydrodynamique et thermique d'un nouveau concept de récepteur solaire à suspensions denses gazparticules". Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/13944/1/boissiere.pdf.

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Parmi les centrales solaires thermiques à concentration, la technologie des centrales à tour offre l'un des rendements les plus importants de production d'énergie. Néanmoins, l'efficacité et la sécurité de ces centrales sont améliorables. En effet, les sels fondus, généralement utilisés comme fluide de transfert thermique, présentent une plage limitée d'utilisation (200-550°C), à l'origine des limites d'efficacité de la conversion thermique-électrique, ainsi que de consommations parasites d'énergie de chauffage. De plus, leurs caractères corrosif et comburant sont à l'origine de sévères contraintes de sécurité. Un nouveau concept de récepteur solaire, dont les caractéristiques permettent de s'affranchir des contraintes associées aux sels fondus, est présenté dans ce manuscrit. Il utilise des suspensions denses de particules fluidisées par un gaz comme fluide de transfert et de stockage de l'énergie thermique. Ce concept, et la technologie de récepteur associée, a été brevetée par Flamant et Hemati dans le cadre d'une collaboration entre le Laboratoire CNRS-PROMES d'Odeillo, et l'Institut National Polytechnique de Toulouse. Son développement a reçu le soutien financier du CNRS, puis de la Commission Européenne. Les propriétés thermiques du carbure de silicium ont déterminé le choix de ce solide. Le diamètre moyen des particules utilisées avoisine 60 micromètres (groupe A). Ces particules présentent d'excellentes propriétés de fluidisation pour des vitesses de gaz faibles. La construction et l'exploitation d'une maquette froide transparente ont permis de démontrer la faisabilité hydrodynamique du concept. Cette maquette est un échangeur à deux passes. Chaque passe est constituée de deux tubes verticaux en parallèle. L'une est traversée par un débit vertical ascendant de solide, l'autre descendant. Un débit de solide continu, stable et équitablement réparti a été obtenu à l'intérieur des tubes. La caractérisation hydrodynamique détaillée de l'écoulement, et du comportement globale de la maquette, en fonction des conditions opératoires, a été effectué sur la partie ascendante de l'écoulement dans l'échangeur. La construction et l'exploitation d'une maquette chaude, constituée d'un seul tube traversé par une suspension dense en écoulement ascendant, chauffé par 3 fours d'une puissance totale de 5,6 kW, a permis d'estimer la capacité de transfert thermique de ce nouveau type d'échangeur. Le contrôle et la stabilité des conditions opératoires a permis d'évaluer l'effet de ces dernières sur le transfert thermique entre l'échangeur et la suspension dense de fines particules le traversant. La modélisation par 3 approches du transport ascendant de la suspension dense a également été réalisée. Une approche corrélative 1D basée sur le formalisme du modèle Bulle-Emulsion, adapté afin de tenir compte de l'entraînement des particules dans le sillage des bulles. Ce modèle permet de représenter la structure diphasique de l'écoulement. Une autre approche 1D a été utilisée. Elle repose sur la résolution des équations locales de conservation de masse et de quantité de mouvement sur chaque phase gaz et solide. Cette méthode permet de s'affranchir des hypothèses du modèle Bulle-Emulsion. Enfin, la simulation numérique 3D a été réalisée sur un maillage complet du système, de telle sorte que les conditions aux bornes imposées son identiques à celle imposée par l'opérateur (débit de fluidisation, débit d'aération, débit de solide, pression de la nourrice). Cette dernière apporte des informations sur la structure locale de l'écoulement, dont les caractéristiques permettent d'expliquer l'efficacité du transfert thermique entre la suspension et la paroi observé expérimentalement.

Machado, Jaison Carlosso. "Desenvolvimento e controle de qualidade de micropartículas poliméricas contendo praziquantel para o tratamento pediátrico da esquistossomose". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/181180.

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A esquistossomose é uma doença parasitária aguda e crônica causada por vermes sanguíneos (vermes nematoides) do gênero Schistosoma. O homem contrai a esquistossomose através da penetração ativa da cercaria na pele. A importância do tratamento desta enfermidade consiste não só no fato de curar a doença ou diminuir a carga parasitária dos pacientes, bem como impedir sua evolução para formas mais graves. Para o tratamento da esquistossomose o fármaco de escolha é o praziquantel; isso se deve ao seu amplo espectro, sua eficácia, segurança e a relação custo/tratamento. A única forma farmacêutica disponível no Brasil é o comprimido, na dose de 600 mg, a qual pode ser subdividida em quatro partes de 150 mg, a fim de facilitar o ajuste de dose. No entanto, no momento da subdivisão dos comprimidos ocorre o rompimento do revestimento. Este fato acaba levando a uma exposição do fármaco e, consequentemente, de seu sabor amargo. Esta característica dificulta a administração do medicamento, principalmente na população infantil, prejudicando o tratamento e o controle da doença. Uma alternativa para este problema é o desenvolvimento de sistemas poliméricos microparticulados que associados ao fármaco impediriam o contato direto com as papilas gustativas e assim promoveriam uma melhoria na palatabilidade. Para isso utilizou-se a técnica modificada de deposição interfacial do polímero pré-formado seguido de secagem por aspersão. Três matrizes poliméricas, com diferentes características de liberação foram utilizadas, Eudragit RL 100 – liberação tempo dependente e Eudragit E100 e L30D-55 – liberação pH dependente. Além disso, dois tipos de sistemas carreadores do fármaco foram preparados, microcápsulas e microesferas poliméricas. Estes sistemas obtidos foram avaliados e caracterizados a fim de eleger a melhor proposta de formulação visando o mascaramento do sabor do fármaco. De acordo com os resultados obtidos selecionou-se um sistema composto por microcápsulas formadas a partir do polímero L30D-55. A partir de então inseriu-se este sistema na forma farmacêutica pó para suspensão oral, onde diferentes propostas de formulações, contendo dois edulcorantes auxiliares, aspartame e sacarina, separadamente, e seus respectivos placebos foram avaliadas através de um método in vitro para a determinação do sabor, a língua eletrônica ou sensor gustativo. As diferentes formulações avaliadas apresentaram capacidade em mascarar o sabor desagradável do fármaco e, assim resultam em uma promissora alternativa para o aumento da adesão por parte dos pacientes à terapêutica, principalmente para crianças, em virtude da facilidade de administração, do ajuste da dose em função da massa corpórea e ao sabor muito mais agradável ao paladar infantil.
Schistosomiasis is a parasitic disease acute and chronic caused by blood worms (nematodes worms) of the genus Schistosoma. Man acquires schistosomiasis through the active penetration of the worms in skin. The importance of treatment of this disease is not only the fact of curing the disease or decreases the parasite load of patients, well as prevent progression to more severe forms. For the treatment of schistosomiasis praziquantel is the drug of choice, this is due to its wide spectrum, its efficacy, safety and the relation cost / treatment. The single dosage form available in Brazil is tablet at a dose of 600 mg, which can be subdivided into four parts of 150 mg to facilitate dose adjustment. However when the subdivision of the tablets occurs the disruption of the coating. This fact provides a drug exposure and consequently of its bitter taste. This characteristic complicates the administration of the drug mainly in children, affecting the treatment and control of disease. An alternative for this problem is the development of microparticulate polymeric systems which associated with the drug would prevent direct contact with the taste buds and thus promote an improvement in palatability. For this was used a modified technique interfacial deposition of preformed polymer followed by spray drying. Three polymer matrices with different release characteristics have been used, Eudragit RL 100 – time dependent release, and Eudragit E100 and L30D-55 – pH dependent release. Furthermore, two types of drug carrier systems have been prepared, polymeric microspheres and microcapsules. These systems obtained were evaluated and characterized in order to select the best proposal formulation aimed at masking the taste of the drug. According to the results we selected a system comprising microcapsules formed from L30D-55 polymer. From then was inserted into this system in the pharmaceutical form, powder for oral suspension, where different proposals formulations containing two auxiliary sweeteners, aspartame and saccharin, separately, and their respective placebos were evaluated in an in vitro method for determining the taste, the electronic tongue. The different formulations tested presented excellent ability to mask the unpleasant taste of the drug and thus present an excellent alternative for increasing adherence to therapy, especially for children, because of the ease of administration, according on dose adjustment of body mass and the much more palatable to children's taste.

Catalot-Martinent, Valérie. "Étude de suspensions ciment alumineux-eau : corrélations rhéologie-granularité-compacité". Grenoble INPG, 1997. http://www.theses.fr/1997INPG4209.

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Dans cette etude nous nous sommes interesses aux relations entre les proprietes intrinseques d'une poudre comme sa granularite et sa compacite et son comportement rheologique en suspension dans l'eau. Le poudre etudiee est un ciment presentant une courbe granulometrique tres etalee (0 - 100m). Nous avons realise une etude systemique. Elle consiste a fractionner le ciment en plusieurs populations (quatre). Ces fractions ont ete melangees afin d'obtenir des populations presentant des courbes granulometriques tres variees. Nous avons caracterise ces poudres : etude granulaire, compacite, et etudie le comportement rheologique de ces poudres en suspension. Les tests d'ecoulement ont ete realises a l'aide d'un rheometre a contrainte impose. Les correlations observees entre la rheologie et la granularite peuvent s'expliquer par la combinaison de deux phenomenes mis en evidence par le melange : le phenomene de surface et d'agglomeration des particules fines et le phenomene de sedimentation des grosses particules. Nous observons un ecoulement maximum entre deux diametres, dans cette zone, nous montrons que le comportement rheologique est fonction de l'etalement granulaire et de la compacite de la poudre autrement dit de l'arrangement des grains.

Tiabi, Nadia. "Synthèse de préformes dopées ytterbium par voie poudre pour la réalisation des lasers à fibre de haute puissance". Electronic Thesis or Diss., Limoges, 2023. http://www.theses.fr/2023LIMO0049.

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Les travaux présentés dans ce manuscrit s’inscrivent dans le cadre d’une thèse CIFRE en colla-boration entre le laboratoire Xlim et le centre technologique optique & lasers « ALPhANOV ». L’objectif principal de cette thèse consiste à développer des préformes dopées à l’ytterbium, conçues pour résister au phénomène de photo-noircissement (PN), en vue de leur utilisation dans des applications laser à haute puissance. Ce phénomène dégrade les performances des lasers et entraîne une réduction de leur puissance de sortie. Les travaux de cette thèse sont articulés autour de deux principaux axes. Le premier vise à définir la composition du cœur ainsi que la méthode de synthèse appropriée pour fabriquer des cœurs de préformes résistant face au photo-noircissement (PN). Le deuxième axe repose sur l’élaboration, la caractérisation et l’évaluation des performances optiques de la fibre obtenue. La matrice choisie pour être étudiée est la matrice alumino-phosphosilicate. Elle a été obtenue par une méthode de synthèse appelée « poudre en suspension ». Les différentes étapes de ce procédé de fabrication ont été validées depuis la synthèse de la préforme jusqu’à l’étirage de la fibre optique. Les tests optiques effectués sur la fibre optique ont révélé d’excellentes performances, avec une faible atténuation de 0.1 dB/m et une efficacité de conversion optique- optique très prometteuse de 76 %. L’évaluation de cette fibre face au phénomène de photo- noircissement a révélé une résistance exceptionnelle. Aucune décroissance en puissance n’a pu être constatée au cours des expériences effectuées sur plus de 100 h
The work presented in this manuscript is part of a PhD thesis carried out by CIFRE in collabora-tion between the laboratory of Xlim and the technological center of optics and lasers "ALPhA-NOV". The main objective of this thesis is to design ytterbium doped preforms that are resistant to the photodarkening (PD) phenomenon for use in high power laser applications.This phenomenon degrades laser performance and leads to reduced output. Two main areas are focused in this thesis. The first is the definition of the core composition and the appropriate synthesis method for the production of preform cores which are resistant to photodarkening (PD). The second is to develop, characterize and evaluate the optical performance of the resulting fiber. The matrix that has been chosen for the study is the alumino-phosphosilicate matrix. To obtain this matrix, a synthesis method called "powder in suspension" was used.From the synthesis of the preform to the drawing of the optical fiber, the different stages of the process have been validated. Excellent performance, with low attenuation of 0.1 dB/m and a very promising optical-to-optical conversion efficiency of 76%, was obtained from the optical tests performed on the fiber. The evaluation of the fiber against photodarkening showed an exceptional resistance. No performance degradation was observed over 100 hours

Azimi, Mandana. "EVALUATION OF THE REGIONAL DRUG DEPOSITION OF NASAL DELIVERY DEVICES USING IN VITRO REALISTIC NASAL MODELS". VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4780.

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The overall objectives of this research project were i) to develop and evaluate methods of characterizing nasal spray products using realistic nasal airway models as more clinically relevant in vitro tools and ii) to develop and evaluate a novel high-efficiency antibiotic nanoparticle dry powder formulation and delivery device. Two physically realistic nasal airway models were used to assess the effects of patient-use experimental conditions, nasal airway geometry and formulation / device properties on the delivery efficiency of nasal spray products. There was a large variability in drug delivery to the middle passages ranging from 17 – 57 % and 47 – 77 % with respect to patient use conditions for the two nasal airway geometries. The patient use variables of nasal spray position, head angle and nasal inhalation timing with respect to spray actuation were found to be significant in determining nasal valve penetration and middle passage deposition of Nasonex®. The developed test methods were able to reproducibly generate similar nasal deposition profiles for nasal spray products with similar plume and droplet characteristics. Differences in spray plume geometry (smaller plume diameter resulted in higher middle passage drug delivery) were observed to have more influence on regional nasal drug deposition than changes to droplet size for mometasone furoate formulations in the realistic airway models. Ciprofloxacin nanoparticles with a mean (SD) volume diameter of 120 (10) nm suitable for penetration through mucus and biofilm layers were prepared using sonocrystallization technique. These ciprofloxacin nanoparticles were then spray dried in a PVP K30 matrix to form nanocomposite particles with a mean (SD) volume diameter of 5.6 (0.1) µm. High efficiency targeted delivery of the nanocomposite nasal powder formulation was achieved using a modified low flow VCU DPI in combination with a novel breathing maneuver; delivering 73 % of the delivered dose to the middle passages. A modified version of the nasal airway model accommodating Transwell® inserts and a Calu-3 monolayer was developed to allow realistic deposition and evaluation of the nasal powder. The nanocomposite formulation was observed to demonstrate improved dissolution and transepithelial transport (flux = 725 ng/h/cm2) compared to unprocessed ciprofloxacin powder (flux = 321 ng/h/cm2).

Mortazavi, Ramin. "Simulation of fine powder suspensions". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0015/MQ53593.pdf.

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Livros sobre o assunto "Powder in suspension":

United States. National Aeronautics and Space Administration., ed. Optimum dimensions of power solenoids for magnetic suspension. Washington DC: National Aeronautics and Space Administration, 1985.

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Nelson, Ralph D. Dispersing powders in liquids. Amsterdam: Elsevier, 1988.

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Andersen, Niels Åkerstrøm, e Inger-Johanne Sand. Hybrid forms of governance: Self-suspension of power. Basingstoke: Palgrave Macmillan, 2012.

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H, Adair James, American Ceramic Society Meeting e Science, Technology, and Applications of Colloidal Suspensions Symposium (1994 : Indianapolis, Ind.), eds. Science, technology, and applications of colloidal suspensions. Westerville, Ohio: American Ceramic Society, 1995.

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Gambia. The Constitution of the Republic of the Gambia (Suspension and Modification) Decree 1994. Banjul, The Gambia: Printed by the Govt. Printer, under the Ministry of Information and Tourism, 1994.

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Haynes, John Harold. The Haynes suspension, steering and driveline manual. Sparkford Nr Yeovil, Somerset, England: Haynes Pub. Group, 1998.

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Tadros, Tharwat F. Dispersion of Powders in Liquids and Stabilization of Suspensions. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527656592.

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Michaelides, Efstathios E. (Stathis). Heat and Mass Transfer in Particulate Suspensions. New York, NY: Springer New York, 2013.

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Graham, T. A. Design of an air cushion suspension for an electric bus inductive power pickup. [S.l.]: [s.n.], 1988.

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Library of Congress. Congressional Research Service., ed. Suspension of budget enforcement procedures in the event of a declaration of war. [Washington, D.C.]: Congressional Research Service, Library of Congress, 1991.

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Capítulos de livros sobre o assunto "Powder in suspension":

Stobierski, Ludosław, Jerzy Lis e Agnieszka Gubernat. "SiC Powder for Casting from Aqueous Suspension". In Advances in Science and Technology, 297–302. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908158-01-x.297.

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Casati, Riccardo. "Consolidation of Al Powder and Colloidal Suspension of Al2O3 Nanoparticles after 2 h Ball Milling". In SpringerBriefs in Applied Sciences and Technology, 59–64. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-27732-5_4.

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Casati, Riccardo. "Consolidation of Al Powder and Colloidal Suspension of Al2O3 Nanoparticles After 16 h Ball Milling". In SpringerBriefs in Applied Sciences and Technology, 65–96. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-27732-5_5.

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Casati, Riccardo. "Consolidation of AL Powder and Colloidal Suspension of Al2O3 Nanoparticles After 24 h Ball Milling". In SpringerBriefs in Applied Sciences and Technology, 97–105. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-27732-5_6.

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Tabellion, Jan, Rolf Clasen, Jörg Reinshagen, Rainer Oberacker e Michael J. Hoffmann. "Correlation Between Suspension Structure and Rheological Properties of Suspensions of Nanosized Fumed Silica Powders". In Improved Ceramics through New Measurements, Processing, and Standards, 183–88. 735 Ceramic Place, Westerville, Ohio 43081: The American Ceramic Society, 2012. http://dx.doi.org/10.1002/9781118371480.ch25.

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Abeyratne, Ruwantissa. "Article 62 Suspension of Voting Power". In Convention on International Civil Aviation, 599. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00068-8_63.

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Sarva, Kishorkumar, Tejas G. murthy e Gaurav Tomar. "Particle Filtration in Suspension Droplet Breakup". In Fluid Mechanics and Fluid Power, Volume 5, 387–94. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-6074-3_36.

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Hausnerová, B., P. Sáha, J. Kubát, T. Kitano e J. Becker. "Shear Flow of Highly Concentrated Carbide Powder Suspensions". In Progress and Trends in Rheology V, 392–93. Heidelberg: Steinkopff, 1998. http://dx.doi.org/10.1007/978-3-642-51062-5_188.

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Sherratt, Simon. "The Bank of England and the suspension of cash payments (1797–1821)". In Credit and Power, 19–53. Milton Park, Abingdon, Oxon ; New York, NY : Routledge Taylor & Francis, 2021. | Series: Routledge studies in modern British history: Routledge, 2020. http://dx.doi.org/10.4324/9780429319396-2.

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Henkel, Anna. "The Suspension of Power in German Health Politics: Rising Demands and the Function of Suspension". In Hybrid Forms of Governance, 85–101. London: Palgrave Macmillan UK, 2012. http://dx.doi.org/10.1057/9780230363007_6.

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Trabalhos de conferências sobre o assunto "Powder in suspension":

Toma, F. L., S. Langner, M. M. Barbosa, L. M. Berger, C. Rödel e A. Potthoff. "Influence of the Suspension Characteristics and Spraying Parameters on the Properties of Dense Suspension-HVOF Sprayed Al2O3 Coatings". In ITSC2011, editado por B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima e A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0399.

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Abstract In this work suspension-HVOF spraying (S-HVOF) was used to prepare dense and mechanical stable Al2O3 sprayed coatings with high contents of α-Al2O3 phase. Aqueous suspensions with various contents of powder (from 25 wt.% up to 50 wt.%) have been developed starting from two commercial α-Al2O3 powders, characterized by different purity and particle sizes. The suspensions have been internally injected in a modified combustion chamber of a HVOF TopGun-torch. Coating microstructures, phase compositions and mechanical properties resulting from the interaction between suspension characteristics and spray parameters are presented. Use of suspensions with high solid contents allowed the production of thick, dense and mechanically stable coatings. The α-Al2O3 was the main phase in the coatings produced through the injection of suspensions containing powders with very high purity.

Bouyer, E., F. Gitzhofer e M. I. Boulos. "Powder Processing by Suspension Plasma Spraying". In ITSC 1997, editado por C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0353.

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Abstract Suspension Plasma Spraying (SPS) is a thermal spray process based on a suspension of fine (<10 μm) or even ultrafine (<100 nm) powders which is axially fed into the induction plasma through an atomization probe. The atomization of the suspension results in microdroplets (20 μm in size). They are flash dried in the plasma, melted and finally can impact a substrate to build a coating or be cooled down and collected as a spheroidized powder. The large industrial potential of this technology results first from the use of fine powder or even sol-gel which is one of the starting step for many ceramic processes, and second from the various side benefits of the liquid phase in the SPS. Indeed, the liquid phase can be simply a carrier for ultrafine powder, or a protection against oxidation in the case of metals, or a protection for health in the case of whiskers, for instance. It can also take a part in chemical reactions when the liquid phase is a solution of chloride, nitrates... or it can be an organic liquid for the synthesis of carbide, where CO is a strong reducer. Furthermore the liquid phase can also release some energy because of its combustion at the very end of the process. It can also change the local atmosphere surrounding the in flight droplets in the plasma where it is possible to use H2O2 as a carrier in order to increase the oxygen partial pressure around sensitive to oxygen decomposition materials. The applications of SPS are in the powder synthesis (in R&D or production), in the spraying of metals, ceramics or composites directly synthesized, or in production of very reactive with air materials. Applications of SPS will be presented for hydroxyapatite (HA) and NiAlMo. Induction plasma SPS coatings and/or powders properties will be discussed as a function of the SPS process variables.

Sánchez, E., C. Felíu, P. Carpio, E. Bannier, R. Moreno, M. C. Alcázar, M. D. Salvador, R. Benavente e V. Bonache. "Reconstitution of Yttria-Stabilised Zirconia Nanopowders to Obtain Coatings by Atmospheric Plasma Spraying". In ITSC2011, editado por B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima e A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0662.

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Abstract Yttria-stabilised zirconia (YSZ) coatings were deposited on austenitic stainless steel coupons from nanostructured powders using atmospheric plasma spraying (APS). Two suspensions of YSZ nanoparticles were used as starting material: a diluted commercial suspension and a highly concentrated in-house prepared suspension (obtained by adding an YSZ submicronic powder to the diluted suspension). Both suspensions were reconstituted into sprayable micrometric granules. The reconstitution process was performed by spray drying, followed by a thermal treatment in order to reduce porosity and enhance agglomerate sinterability. The reconstituted powders were characterised by XRD, SEM, granule and pore sizing techniques, and a flowability evaluation. The effect of suspension characteristics on granule morphology and porosity was examined. The reconstituted powders were successfully deposited, yielding well-bonded coatings. The coating microstructure was characterised by XRD and SEM. Mechanical properties and erosion resistance were also determined. Coating microstructure consisted of semi-molten feedstock agglomerates surrounded by fully molten areas that acted as binders. The influence of feed powder characteristics on coating microstructure and properties was also studied.

Bouyer, Etienne, Matthias Muller, Nicolas Dignard, Francois Gitzhofer e Maher I. Boulos. "Suspension plasma spraying for powder preparation". In Progress in Plasma Processing of Materials, 1997. Connecticut: Begellhouse, 2023. http://dx.doi.org/10.1615/itppc-1996.890.

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Mubarok, F., J. Puranen, P. Vuoristo, R. Johnsen e N. Espallargas. "Effect of Suspension Characteristics on Microstructure of Suspension Plasma Sprayed SiC Submicron Coatings". In ITSC2011, editado por B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima e A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0734.

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Abstract Thermal spraying of pure SiC is difficult due to decomposition issues at elevated temperatures. However, the development of suspension plasma spray opens a new path to investigate the deposition of this material since the liquid carrier can hinder this phenomenon. The present work investigates a new route for producing SiC submicron structured coating by suspension plasma spraying (SPS). Classical SiC manufacturing routes using suspension (i.e: spray drying, tape casting) are studied regarding their feasibility to be used on suspension plasma spraying. Aqueous-based suspensions containing 10 wt.% SiC powder (0.60 µm) along with sintering additives are dispersed and stabilized. Both suspensions are sprayed on martensitic stainless steel substrate (AISI 440C) to achieve finely structured and dense coatings. Digital image analysis, X-ray diffraction and scanning electron microscopy are utilized to characterize the coating microstructures. Their dependency on suspension characteristics and spray operation parameters are discussed with respect to the final coating performance.

Killinger, A., P. Müller e R. Gadow. "High Velocity Suspension Flame Spraying and Suspension Plasma Spraying of Oxide Ceramics". In ITSC 2012, editado por R. S. Lima, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, A. McDonald e F. L. Toma. ASM International, 2012. http://dx.doi.org/10.31399/asm.cp.itsc2012p0442.

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Abstract Thermal spraying of oxide ceramic suspensions containing fine and ultrafine powder particles is a new approach for manufacturing ceramic coatings exhibiting a refined microstructure. Suspension sprayed coatings clearly differ from conventionally sprayed coatings regarding microstructure phase composition and resulting mechanical properties. Several industrial applications may take advantage in future; among these are thermal barrier structures, thermal shock protection, solid electrolytes, catalytically active surfaces and wear resistant coatings. Two methods, namely Suspension Plasma Spraying (SPS) and High Velocity Suspension Flame Spraying (HVSFS) are suitable to process suspensions but lead to rather different coating structures due to differences in the achievable particle velocities and temperature. Generally, HVSFS can lead to more dense coatings with low porosity values. With SPS on the other hand, coatings with a high volume fraction of porosity featuring a homogeneous pore structure are achievable. The presentation will compare SPS and HVSFS regarding the spray process, achieved properties of the oxide coatings and potential applications.

Ibe, H., T. Masuda, K. Sato e N. Kato. "Characteristics of Dense AI2O3 Coating Prepared by Suspension Plasma Spraying". In ITSC2017, editado por A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen e C. A. Widener. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0173.

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Abstract Sintering ceramics have been widely used in industries which require electrical and mechanical properties. Thermal sprayed ceramics coatings are also applied for the industries, however the coating which has micron size pores are limited their applications due to inferior electrical and mechanical properties compared with sintering bulk. To expand thermal sprayed ceramics coating applications, dense coatings prepared by suspension plasma spraying are widely studied. Dense Al2O3 coatings are applicable to fabricating equipment for electronics devices, such as ESC. There are no reports regarding electric properties of plasma sprayed dense Al2O3 coating with different spray conditions. In this study to achieve a electric properties of dense Al2O3 coating, spray parameters such as plasma power, gas flow rate and spray distance are investigated. Suspension materials prepared with three microns Al2O3 powder are sprayed by high power suspension plasma spraying system. Spray conditions, plasma power, gas flow rate, and stand-off distance affect the coating density, crystal phase, and mechanical and electrical properties. Mechanism of coating formation by plasma spraying with fine powder suspensions will be discussed based on the findings. Al2O3 coatings obtained by the plasma spraying is applied for application to application utilizing the electrical insulation properties of such electronics devise manufacturing equipment components is proceeding.

Sokołowski, P., M. Gałafin, S. Kozerski e M. Korzeniowski. "The Possibility of Using Ultrasonic Waves to Support Suspension Plasma Spraying Process". In ITSC2017, editado por A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen e C. A. Widener. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p1171.

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Abstract Suspension Plasma Spraying is one of the newest thermal spray processes. It uses liquid feedstock instead of dry powders, as it is in case of conventional Powder Plasma Spraying. The suspension preparation process should be optimized individually depending on the powder material to avoid poor suspension stabilization, fast sedimentation of solids or too high viscosity. However, regardless of the liquid feedstock preparation, each kind of suspension causes some technological problems during spraying. In this study the possibility of using high power ultrasonic waves to support the suspension feeding and injection was investigated. The idea was to break the powder agglomerates before the suspension goes through the injector (in the pipeline system). The in-line ultrasonic dispersion system was designed. The geometry of all important components (transducer, booster and horn) was analyzed and calculated depending on the frequency and power of ultrasounds. By using modal analysis and Finite Element Method (FEM) the propagation of ultrasonic wave was simulated for different sonotrode geometries, called: (i) stepped, (ii) exponential, (iii) catenoidal and (iv) tapered. The in-house system was initially tested in order to see if all elements were designed and manufactured properly. Finally, the ultrasonic cavitation was observed inside the feeding pipeline system, which should allow dispersing the suspension prior to its injection into the plasma jet.

Tomaszek, R., L. Pawlowski, L. Gengembre, J. Laureyns, Z. Znamirowski e J. Zdanowski. "Microstructure and Electronic Emission of Plasma Sprayed TiO2 Functional Coating with Gradient of Crystal Grain Size". In ITSC2006, editado por B. R. Marple, M. M. Hyland, Y. C. Lau, R. S. Lima e J. Voyer. ASM International, 2006. http://dx.doi.org/10.31399/asm.cp.itsc2006p0715.

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Abstract The paper aims at the development of coating having a gradient of crystal grain size. Thick, inner layer was plasma sprayed using coarse TiO2 powder. This layer has the thickness ranging from 30 to 50 µm. Thin, outer layer of thickness smaller than 10 µm, was plasma sprayed using different aqueous suspensions of fine powders of TiO2. The morphology of coarse and fine powders was characterized using scanning electron microscope (SEM) X-ray diffraction (XRD). Electronic emission was tested using home made setup. X-ray diffraction enabled to find out an interesting result which is formation of a mixture of rutile and anatase in suspension sprayed coatings. This was also confirmed by Raman spectroscopy investigations. The technology of suspensions plasma spraying was optimized to obtain homogeneous and dense deposits. The sizes were in the range of tenth to one hundred nanometers in initial powders and get clearly smaller in the coatings sprayed using coarse powder but remained quite similar in suspension sprayed films. X-ray photoelectric spectroscopy (XPS) was used to analyze quantitatively TiO2 powders and coatings. Electronic emission was correlated with phase composition of the coating and their grain size.

Kiilakoski, J., A. Lutoschkin, M. Plachetta, M. Apostol, H. Koivuluoto, P. Müller, A. Killinger e P. Vuoristo. "Fracture Characteristics of High-Velocity Suspension Flame-Sprayed Aluminum Oxide Coatings". In ITSC 2016, editado por A. Agarwal, G. Bolelli, A. Concustell, Y. C. Lau, A. McDonald, F. L. Toma, E. Turunen e C. A. Widener. DVS Media GmbH, 2016. http://dx.doi.org/10.31399/asm.cp.itsc2016p0466.

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Abstract The aim of this work is to evaluate the brittleness of suspension sprayed aluminum oxide coatings with various methods, including Vickers indentation fracture toughness, four-point bending, and high-velocity particle impact testing. Coatings were applied via high-velocity suspension flame spraying (HVSFS) using suspensions of isopropanol and water solvents. HVOF-sprayed Al2O3 powder feedstock was used as a reference. The tests are described and the results are presented and discussed.

Relatórios de organizações sobre o assunto "Powder in suspension":

A.P. Poloski, R.C. Daniel, D.R. Rector, P.R. Bredt, E.C. Buck, J. C. Berg e A. E. Saez. Characterization and Correlation of Particle-Level Interactions to the Macroscopic Rheology of Powders, Granular Slurries, and Colloidal Suspensions. Office of Scientific and Technical Information (OSTI), setembro de 2006. http://dx.doi.org/10.2172/895727.

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Poloski, Adam P., Richard C. Daniel, David R. Rector, Paul R. Bredt, Edgar C. Buck, John C. Berg e Avelino E. Saez. Characterization and Correlation of Particle-Level Interactions to the Macroscopic Rheology of Powders, Granular Slurries, and Colloidal Suspensions. Office of Scientific and Technical Information (OSTI), setembro de 2006. http://dx.doi.org/10.2172/957373.

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DeLacy, Brendan G., e Janon F. Embury. Infrared Extinction Coefficients of Aerosolized Conductive Flake Powders and Flake Suspensions having a Zero-Truncated Poisson Size Distribution. Fort Belvoir, VA: Defense Technical Information Center, novembro de 2012. http://dx.doi.org/10.21236/ada570956.

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Coleman, Jessica, Alan Kennendy, Jacob Stanley e Lauren Rabalais. Sediment spiking methodologies for nanomaterial powders and aqueous suspensions for aquatic toxicity bioassays : Scientific Operating Procedure series : SOP-T-3. Environmental Laboratory (U.S.), julho de 2018. http://dx.doi.org/10.21079/11681/27642.

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Vehicle Surge Reduction Technology during Towing in Parallel HEV Pickup Truck. SAE International, março de 2022. http://dx.doi.org/10.4271/2022-01-0613.

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This paper proposes a technology to reduce vehicle surge during towing that utilizes motors and shifting to help ensure comfort in a parallel HEV pickup truck. Hybridization is one way to reduce fuel consumption and help realize carbon neutrality. Parallel HEVs have advantages in the towing, hauling, and high-load operations often carried out by pickup trucks, compared to other HEV systems. Since the engine, motor, torque converter, and transmission are connected in series in a parallel HEV, vehicle surge may occur when the lockup clutch is engaged to enhance fuel efficiency, similar to conventional powertrains. Vehicle surge is a low-frequency vibration phenomenon. In general, the source is torque fluctuation caused by the engine and tires, with amplification provided by first-order torsional driveline resonance, power plant resonance, suspension resonance, and cabin resonance. This vibration is amplified more during towing. Therefore, this paper proposes two surge reduction technologies to help achieve fuel efficiency and surge at the same time during towing. One technology is a gear shift control that avoids engine operating zones where two or more resonance frequencies coincide, which is realized by changing the equivalent inertia via appropriate gear selection. The second technology is an anti-vibration control, which makes effective use of the hybrid system motors by adding motor torque to suppress the relative displacement between the driveline and the tires.