Bibliographies thématiques / Carbonatic and metallic surface

Littérature scientifique sur le sujet « Carbonatic and metallic surface »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Carbonatic and metallic surface"

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Ben Yaacov, Adva, Roey Ben David, David C. Grinter, Georg Held et Baran Eren. « Identification of Adsorbed Species and Surface Chemical State on Ag(111) in the Presence of Ethylene and Oxygen Studied with Infrared and X-ray Spectroscopies ». Physchem 1, no 3 (12 novembre 2021) : 259–71. http://dx.doi.org/10.3390/physchem1030020.

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Using a combination of two surface-sensitive spectroscopy techniques, the chemical state of the Ag(111) surface and the nature of the adsorbed species in the presence of ethylene and oxygen gases are identified. In the 10 mbar pressure range and 25–200 °C studied here, Ag(111) remains largely metallic even in O2-rich conditions. The only adsorbed molecular species with a low but discernible coverage is surface carbonate, which forms due to further oxidation of produced CO2, in a similar manner to its formation in ambient air on Ag surfaces. Its formation is also pressure-dependent, for instance, it is not observed when the total pressure is in the 1 mbar pressure range. Production of carbonate, along with carbon dioxide and water vapor as the main gas-phase products, suggests that an unpromoted Ag(111) surface catalyzes mainly the undesired full oxidation reaction.
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Dutta, Abhijit, Kiran Kiran, Motiar Rahaman, Ivan Zelocualtecatl Montiel, Pavel Moreno-Garcí, Soma Vesztergom, Jakub Drnec, Mehtap Oezaslan et Peter Broekmann. « Insights from Operando and Identical Location (IL) Techniques on the Activation of Electrocatalysts for the Conversion of CO2 : A Mini-Review ». CHIMIA International Journal for Chemistry 75, no 9 (15 septembre 2021) : 733–43. http://dx.doi.org/10.2533/chimia.2021.733.

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In this mini-review we compare two prototypical metal foam electrocatalysts applied to the transformation of CO2 into value-added products (e.g. alcohols on Cu foams and formate on Bi foams). A substantial improvement in the catalyst performance is typically achieved through thermal annealing of the as-deposited foam materials, followed by the electro-reduction of the pre-formed oxidic precursors prior or during the actual CO2 electrolysis. Utilizing highly insightful and sensitive complementary operando analytical techniques (XAS, XRD, and Raman spectroscopy) we demonstrate that this catalyst pre-activation process is entirely accomplished in case of the oxidized Cu foams prior to the formation of hydrocarbons and alcohols from the CO2. The actually active catalyst is therefore the metallic Cu derived from the precursor by means of oxide electro-reduction. Conversely, in their oxidic form, the Cu-based foam catalysts are inactive towards the CO2 reduction reaction (denoted ec-CO2 RR). Oxidized Bi foams can be regarded as an excellent counter example to the above-mentioned Cu case as both metallic and the thermally derived oxidic Bi foams are highly active towards ec-CO2 RR (formate production). Indeed, operando Raman spectroscopy reveals that CO2 electrolysis occurs upon its embedment into the oxidic Bi2O3 foam precursor, which itself undergoes partial transformation into an active sub-carbonate phase. The potential-dependent transition of sub-carbonates/oxides into the corresponding metallic Bi foam dictates the characteristic changes of the ec-CO2 RR pathway. Identical location (IL) microscopic inspection of the catalyst materials, e.g. by means of scanning electron microscopy, demonstrates substantial morphological alterations on the nm length scale on the material surface as consequence of the sub-carbonate formation and the potential-driven oxide reduction into the metallic Bi foam. The foam morphology on a mesoscopic length scale (macroporosity) remains, by contrast, fully unaffected by these phase transitions.
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Sokol, Ella, Svetlana Kokh, Olga Kozmenko, Sofya Novikova, Pavel Khvorov, Elena Nigmatulina, Elena Belogub et Maxim Kirillov. « Mineralogy and Geochemistry of Mud Volcanic Ejecta : A New Look at Old Issues (A Case Study from the Bulganak Field, Northern Black Sea) ». Minerals 8, no 8 (8 août 2018) : 344. http://dx.doi.org/10.3390/min8080344.

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We characterise the mineralogy and geochemistry of Oligo-Miocene Maykopian shales that are currently extruded by onshore mud volcanoes of the Kerch-Taman Province (the Northern Black Sea) from the depths of ~2.5–3 km. The ejected muds are remarkable by highly diverse authigenic mineralogy that comprises glauconite, apatite, siderite, mixed Fe–Mg–Mn–(Ca) and Mn–Ca–Fe-carbonates, pyrite, marcasite, sphalerite, cinnabar, chalcopyrite, nukundamite, akantite, native Cu, Au and Au–Ag alloys. Precise geochemical techniques and high-resolution methods are applied to study the composition of bulk rocks, sulphide and carbonate fractions, as well as individual mineral species, including trace element and isotopic compositions of carbonates (C, O) and pyrite (S). Mineralogy of clastic and heavy fractions is used as a provenance tracer. Oxygen-deficient to weakly sulphuric deposition conditions are inferred for the parent sediments proceeding from trace element partitioning between carbonate, sulphide, and metallic phases. The main conclusion of the study is that onshore mud volcanoes of the region only transport buried sedimentary material and authigenic minerals they store to the ground surface.
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Rendek, Louis J., Gary S. Chottiner et Daniel A. Scherson. « Effects of Surface Impurities on the Reactivity of Metallic Lithium toward Propylene Carbonate ». Electrochemical and Solid-State Letters 5, no 4 (2002) : A77. http://dx.doi.org/10.1149/1.1459680.

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Branzei, Mihai, Mihai Ovidiu Cojocaru, Leontin Nicolae Druga et Mariana Ion. « Obtaining the Controlled Sulphonitrocarburized Layer Phase Compositions, by the Variation of the Solid Powdery Medium Components ». Revista de Chimie 71, no 7 (4 août 2020) : 225–33. http://dx.doi.org/10.37358/rc.20.7.8240.

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Simultaneous saturation of the metallic surface with sulphur, nitrogen and carbon � named sulphonitrocarburizing (SNC) process - may be carried out in a multitude of variants, differ in media state of aggregation which provide the elements in native state, or differ in phase composition. The most commonly used media in SNC process are liquid or gaseous and from standpoint of phase composition, there are media made of compounds generator of the cyanides, representing important source of carbon and nitrogen, and as a sulphur source, may be used iron sulphide, sodium sulphide, sodium thiocyanides or ammonium. Carbamide/urea (CON2H4) it is frequently used in the media composition met in nitro-carburizing or carbo-nitriding process, alongside being added carbonates (sodium or potassium carbonate), thus resulting in cyanides (primary sources of the elements helping superficial saturation of the metallic products), as a result of the reactions which take place at the operating temperature of process. The medium toxicity decreased, based on carbamide used in nitrocarburizing and in particular, SNC process, being possible by carbonates replacing with ammonium chloride. This paper quantify the possibility of using solid powder mixture constituted of carbamide, in order to achieve SNC process of the iron matrix and effects quantification varying the percentage of the solid powdery mixture, so that it becomes possible to control the layer phase composition, by modifying the phase composition of the powder mixture used in thermo chemical processing.
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Sirenko, H. O., M. B. Skladanyuk et L. M. Soltys. « Metallization of Carbon Fibers by Double and Triple Copper Composition ». Фізика і хімія твердого тіла 16, no 1 (15 mars 2015) : 185–92. http://dx.doi.org/10.15330/pcss.16.1.185-192.

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The theoretical foundations of physics and chemistry and application technology of single- and double-layer coating based on Cu0+Cu2O, Ni0+P, Pb0 on the surface of carbonated fibers have been reviewed. The changes of surface layers crystal structure of carbon fibres in the course of copper-plating have been investigated. The metallic coating process using modified formaldehyde and zinc technology was realized. It is established that copper content in copper – copper oxide increases when using two-layer alternately modified formaldehyde and zinc methods.
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Ion, Rodica-Mariana, Lorena Iancu, Gabriel Vasilievici, Madalina Grigore, Ramona Andrei, George-Ionut Radu, Ramona Grigorescu et al. « Ion-Substituted Carbonated Hydroxyapatite Coatings for Model Stone Samples ». Coatings 9, no 4 (2 avril 2019) : 231. http://dx.doi.org/10.3390/coatings9040231.

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Carbonated hydroxyapatite derivatives (CHAp) and its metallic derivatives (Ag, Sr, Ba, K, Zn) have been prepared and characterized in this paper and their coating capacity on some model stone samples have been evaluated and discussed. These compounds were characterized by using several analytical tools, including X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), to determine the purity of the CHAp sample. The XRD and FTIR results confirmed the presence of AB-carbonated type CHAp. The thermal analysis (TGA) established two stages of weight loss that occured during the heating process: The first weight loss between 30–225 °C corresponding to the partial carbonate release from OH-channel and the second one between 226–700 °C, corresponding to some thermal reactions, possibly to the generation of calcium phosphate. The efficiency and suitability of these products on model stone samples were evaluated by monitoring the resistance to artificial weather (freeze–thaw), and pore structure changes (surface area, pore volume, pore diameter). Meanwhile, optical microscopy (OM) and Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM–EDS) techniques showed the particles size and surface morphology of the samples, as well as information on its chemical composition. Also, the compressive strength of these new compounds as coatings revealed a homogeneity and strengthen of these model stone samples.
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Takahashi, H., Y. B. Tian, J. Sasaki, Jun Shimizu, Li Bo Zhou, Y. Tashiro, Hisao Iwase et Sumio Kamiya. « Effects of Sodium Carbonate and Ceria Concentration on Chemo-Mechanical Grinding of Single Crystal Si Wafer ». Advanced Materials Research 76-78 (juin 2009) : 428–33. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.428.

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Chemo-mechanical grinding (CMG) process is a promising process for large-sized Si substrate fabrication at low cost. An encountered issue in current CMG process of Silicon (Si) wafers is metallic contaminations on ground Si wafer surface, which is attributed to the existence of sodium carbonate in wheel compounds. In this paper, four different CMG wheels were developed and grinding experiments were conducted to study the effects of exclusion of sodium carbonate and concentration of ceria abrasive on grinding performance. The grinding characteristics of the four wheels were analysized and discussed to reveal the effects of different compositions.
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Kumar, H., A. K. Sharma et A. S. Rajawat. « APPLICATIONS OF IMAGING SPECTROSCOPY FOR NON-METALLIC MINERAL EXPLORATION ». ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-5 (27 novembre 2018) : 835–38. http://dx.doi.org/10.5194/isprs-archives-xlii-5-835-2018.

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<p><strong>Abstract.</strong> Imaging spectroscopy/hyperspectral remote sensing technique acquires images in a very narrow and contiguous spectral bands. High spectral resolution data provided by imaging spectrometers enables remote compositional mapping of earth surface. In the present study, we demonstrate the potentials of airborne AVIRIS-NG datasets for identification and mapping of non-metallic minerals. Several minerals such as carbonates, sulphates and phyllosilicate exhibit diagnostic absorption feature in Short Wave Infrared Region (SWIR) (2.0&amp;ndash;2.5<span class="thinspace"></span>&amp;mu;m). Therefore, mapping of wavelength of deepest absorption in SWIR is very useful for exploratory earth surface composition/mineral mapping. To map the mineralogical diversity in the parts of Banswara region, Rajasthan, wavelength of deepest absorption feature and absorption band depth in SWIR region was calculated at each pixel. It was found that majority of pixels showed absorption near &amp;sim;2.31, 2.33 and 2.20<span class="thinspace"></span>&amp;mu;m. Detailed analysis of spectra of image revealed dolomite as dominant mineral at pixels showing deepest absorption at 2.31<span class="thinspace"></span>&amp;mu;m. Calcite and clays were found to be present at pixels showing deepest absorption feature near 2.33 and 2.20<span class="thinspace"></span>&amp;mu;m respectively. It is noted that mapping wavelength position of deepest feature is a very fast and reliable indicator of mineralogy. The mineral map of calcite and dolomite shall be useful for locating new mining prospect in the region.</p>
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Dwijaya, Made Subekti, Muhammad Satrio Utomo, Syafira Nur Ajeng Ramadhanti, Fendy Rokhmanto, Ibrahim Purawiardi, Galih Senopati, Aprilia Erryani et Inti Mulyati. « Deposisi Kalsium Karbonat pada Ti-6Al-6Mo[CALCIUM CARBONATE DEPOSITION ON TI-6AL-6MO] ». Metalurgi 36, no 1 (29 avril 2021) : 17. http://dx.doi.org/10.14203/metalurgi.v36i1.583.

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Osseointegration is one of important property in development of implant materials for orthopedic applications. While biocompatible metallic materials such as titanium alloys should already have adequate biocompatibility properties as implant materials, their osseointegration property could be further improved by bioceramic coating. Calcium carbonate (CaCO3) and hydroxyapatite are two major bioceramics in bones that can be utilized to improve the osseointegration property of metallic implant materials. Current challenge on bioceramic coating of metallic implant materials is to obtain coating method that is facile and economically feasible for implementation in the industry. Here we propose a simple and straightforward method to deposit calcium carbonate on Ti-6Al-6Mo. We utilize two common biomimetic solutions, the phosphate buffer saline (Dulbecco’s PBS) and supersaturated calcification solution (SCS) to induce the calcium carbonate formation on the Ti-6Al-6Mo surface. Microstructural and elemental observations by scanning electron microscope (SEM) – energy dispersive x-ray (EDX) has shown the presence of calcium carbonate on the surface of the Ti-6Al-6Mo immersed in SCS. Moreover, the crystallography analysis by x-ray diffraction (XRD) also confirmed the formation of calcium carbonate on the surface of Ti-6Al-6Mo. We also studied the proposed method on pure Ti (>95%) as comparison and similar outcomes were also observed. The effect on duration of immersion was also accounted in current setting. The outcomes of immersion duration for 7 and 10 days were not significantly different. ABSTRAKOsseointegrasi adalah salah satu properti penting dalam pengembangan material untuk aplikasi implan tulang. Meskipun material logam biokompatibel seperti paduan titanium sudah memiliki properti biokompatibel bawaan yang sudah mencukupi sebagai material implan tulang, sifat osseointegrasi -nya masih dapat ditingkatkan dengan pelapisan biokeramik. Kalsium karbonat (CaCO3) dan hidroksiapatit adalah dua biokeramik utama pada tulang yang dapat dimanfaatkan untuk meningkatkan sifat osseointegrasi pada material implan. Tantangan saat ini pada pelapisan biokeramik pada material implant adalah memperoleh metode pelapisan yang mudah diterapkan dan ekonomis untuk selanjutnya diterapkan di industri. Pada penelitian ini dilakukan sebuah metode yang sederhana untuk mendeposisi kalsium karbonat pada permukaan Ti-6Al-6Mo. Kami menggunakan dua larutan biomimetik yang sudah secara luas digunakan, yaitu Dulbecco’s PBS (phosphate buffer saline) dan SCS (supersaturated calcification solution) untuk membuat pembentukan kalsium karbonat pada permukaan Ti-6Al-6Mo. Pengamatan struktur mikro dan elemental dengan scanning electron microscope (SEM) - energy dispersive x-ray (EDX) menunjukkan keberadaan deposit kalsium karbonat pada permukaan Ti-6Al-6Mo. Lebih lanjut, analisa kristalografi dengan difraksi x-ray (XRD) juga menguatkan keberadaan deposit kalsium karbonat pada permukaan Ti-6Al-6Mo. Kami juga mempelajari metode yang diajukan pada Ti murni (>95%) sebagai perbandingan dan diperoleh hasil yang serupa. Pengaruh durasi perendaman juga diamati dalam penelitian ini. Hasil dari imersi dengan durasi 7 dan 10 hari tidak menunjukkan perbedaan yang signifikan
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Thèses sur le sujet "Carbonatic and metallic surface"

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Chandrasekaran, Shankar. « Surface micromachined hollow metallic microneedles ». Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/15505.

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Abboud, Jaafar Hadi. « Laser surface alloying of titanium by metallic and non-metallic additions ». Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47732.

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Wong, Hoi-man, et 黃凱文. « Surface modification of biodegradable metallic material ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41290689.

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Wong, Hoi-man. « Surface modification of biodegradable metallic material ». Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41290689.

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Chen, Zhuo. « Grating coupled surface plasmons in metallic structures ». Thesis, University of Exeter, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441770.

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Iyer, Srinivasan. « Effects of surface plasmons in subwavelength metallic structures ». Doctoral thesis, KTH, Optik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103613.

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The study of optical phenomena related to the strong electromagnetic response of noble metals (silver (Ag) and gold (Au) being most popular) over the last couple of decades has led to the emergence of a fast growing research area called plasmonics named after 'surface plasmons' which are electron density waves that propagate along the interface of a metal and a dielectric medium. Surface plasmons are formed by the coupling of light to the electrons on the metal surface subject to the fulfillment of certain physical conditions and they are bound to the metal surface. Depending on whether the metallic medium is a continuous film or a structure having dimensions less than or comparable to the wavelength of the exciting light, propagating or localized surface plasmons can be excited. The structure can be either a hole or an arbitrary pattern in a metal film, or a metallic particle. An array of subwavelength structures can behave as an effective homogeneous medium to incident light and this is the basis of a new class of media known as metamaterials. Metallic metamaterials enable one to engineer the electromagnetic response to  incident light and provide unconventional optical properties like negative refractive index as one prominent example. Metamaterials exhibiting negative index (also called negative index materials (NIMs)) open the door for super resolution imaging  and development of invisibility cloaks. However, the only problem affecting the utilization of plasmonic media to their fullest potential is the intrinsic loss of the metal, and it becomes a major issue especially at visible-near infrared (NIR) frequencies. The frequency of the surface plasmon is the same as that of the exciting light but its wavelength could be as short as that of X-rays. This property allows light of a given optical frequency to be conned into very small volumes via subwave lengthmetallic structures, that can be used to develop ecient sensors, solar cells, antennas and ultrasensitive molecular detectors to name a few applications. Also, interaction of surface plasmons excited in two or more metallic subwavelength structures in close proximity inuences the far-eld optical properties of the overall coupled system. Some eects of plasmonic interaction in certain coupled particles include polarization conversion, optical activity and transmission spectra mimicking electromagnetically-induced transparency (EIT) as observed in gas based atomicsy stems. In this thesis, we mainly focus on the optical properties of square arrays of certain plasmonic structures popularly researched in the last decade. The structures considered are as follows: (1) subwavelength holes of a composite hole-shape providing superior near-eld enhancement such as two intersecting circles (called' double hole') in an optically thick Au/Ag lm, (2) double layer shnets, (3) subwavelength U-shaped particles and (4) rectangular bars. The entire work is based on electromagnetic simulations using time and frequency domain methods. Au/Ag lms with periodic subwavelength holes provide extraordinarily high transmission of light at certain wavelengths much larger than the dimension of the perforations or holes. The spectral positions of the maxima depend on the shape of the hole and the intra-hole medium, thereby making such lms function as a refractive index sensor in the transmission mode. The sensing performance of the double-hole geometry is analyzed in detail and compared to rectangular holes. Fishnet metamaterials are highly preferred when it comes to constructing a NIM at optical frequencies. A shnet design that theoretically oers a negative refractive index with least losses at telecommunication wavelengths (1.4 1.5 microns) is presented. U-shaped subwavelength metallic particles, in particular single-slit split-ring resonators (SSRRs), provide a large negative response to the magnetic eld of light at a specic resonance frequency. The spectral positions of the structural resonances of the U-shaped particle can be found from its array far field transmission spectrum at normal incidence. An effort is made to clarify our understanding of these resonances with the help of localized surface plasmon modes excited in the overall particle. From an application point of view, it is found that a planar square array of SSRRs eectively functions as an optical half-wave waveplate at the main resonance frequency by creating a polarization in transmission that is orthogonal to that of incident light. A similar waveplate eect can be obtained purely by exploiting the near-eld interaction of dierently oriented neighbouring SSRRs. The physical reasons behind polarization conversion in dierent SSRR-array systems are discussed. A rectangular metallic bar having its dipolar resonance in the visible-NIR is called a nanoantenna, owing to its physical length in the order of nanometers. The excitation of localized surface plasmons, metal dispersion and the geometry of the rectangular nanoantenna make an analytical estimation of the physical length of the antenna from the desired dipolar resonance dicult. A practical map of simulated resonance values corresponding to a variation in geometrical parameters of Au bar is presented. A square array of a coupled plasmonic system comprising of three nanoantennas provides a net transmission response that mimicks the EIT effect. The high transmission spectral window possesses a peculiar dispersion profile that enables light with frequencies in that region to be slowed down. Two popular designs of such plasmonic EIT systems are numerically characterized and compared.

QC 20121017

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Dorcéna, Cassandre Jenny. « Effects of Metallic Nanoalloys on Dye Fluorescence ». Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35057.

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Metallic nanoparticles (NPs) are exploited for their ability to interact with organic compounds and to increase significantly the fluorescence intensity and the photostability of many fluorescent dye molecules. Metal enhanced fluorescence (MEF) is therefore widely investigated for biosensing applications. When used in immunoassays, silver island films (SIFs) could augment the fluorescence intensity of fluorescein by a factor of seventeen; SIFs were also able to double or triple the emission intensity of cyanine dyes which are commonly used in (deoxyribonucleic acid) DNA microarrays. The emission intensity of indocyanine green â widely used as a contrast agent in medical imaging â was about twenty times higher in the proximity of SIFs. This enhancement phenomenon - due to the surface plasmon polaritons associated with the metallic NPs â can be explained by energy transfer from the metal NPs to the fluorescent dye molecules or by a modified local electromagnetic field experienced by the fluorophores in the vicinity of metal surfaces. Our research focused on the optical characterization of colloidal gold-silver alloy NPs containing different ratios of gold and silver (Au1.00-Ag0.00, Au0.75-Ag0.25, Au0.50- Ag0.50, and Au0.25-Ag0.75), as well as their interaction with three fluorophores: rose bengal, rhodamine B, and fluorescein sodium. Depending upon the dye quantum yield and its concentration in solution, enhancement or quenching of fluorescence was obtained. Thus, a three to five times increase in fluorescence intensity was observed in a 2.0 mM solution of rose bengal with all nanoalloys, a slight enhancement of fluorescence (1.2 â 1.6 times) was noticed in a 0.13 mM solution of rhodamine B with all four types of NPs, and fluorescence quenching occurred in all the fluorescein-NP solutions regardless of the dye concentration.
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Samuel, Sonia Banerjee Rajarshi. « Surface engineering and characterization of laser deposited metallic biomaterials ». [Denton, Tex.] : University of North Texas, 2007. http://digital.library.unt.edu/permalink/meta-dc-3618.

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Leung, Kit-ying, et 梁潔瑩. « Anti-bacteria plasma-treated metallic surface for orthopaedics use ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41633994.

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Samuel, Sonia. « Surface Engineering and Characterization of Laser Deposited Metallic Biomaterials ». Thesis, University of North Texas, 2007. https://digital.library.unt.edu/ark:/67531/metadc3618/.

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Novel net shaping technique Laser Engineered Net shaping™ (LENS) laser based manufacturing solution (Sandia Corp., Albuquerque, NM); Laser can be used to deposit orthopedic implant alloys. Ti-35Nb-7Zr-5Ta (TNZT) alloy system was deposited using LENS. The corrosion resistance being an important prerequisite was tested electrochemically and was found that the LENS deposited TNZT was better than conventionally used Ti-6Al-4V in 0.1N HCl and a simulated body solution. A detailed analysis of the corrosion product exhibited the presence of complex oxides which are responsible for the excellent corrosion resistance. In addition, the in vitro tests done on LENS deposited TNZT showed that they have excellent biocompatibility. In order to improve the wear resistance of the TNZT system boride reinforcements were carried out in the matrix using LENS processing. The tribological response of the metal matrix composites was studied under different conditions and compared with Ti-6Al-4V. Usage of Si3N4 balls as a counterpart in the wear studies showed that there is boride pullout resulting in third body abrasive wear with higher coefficient of friction (COF). Using 440C stainless steel balls drastically improved the COF of as deposited TNZT+2B and seemed to eliminate the effect of “three body abrasive wear,” and also exhibited superior wear resistance than Ti-6Al-4V.
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Livres sur le sujet "Carbonatic and metallic surface"

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Pawson, E. V. Surface properties of metallic powder pigments. Manchester : UMIST, 1996.

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1936-, Nowotny Janusz, et Dufour Louis-Claude, dir. Surface and near-surface chemistry of oxide materials. Amsterdam : Elsevier, 1988.

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Symposium on Surface Oxide Films (1996 San Antonio, Tex.). Proceedings of the Symposium on Surface Oxide Films. Sous la direction de Bardwell Jennifer A, Electrochemical Society Corrosion Division et Electrochemical Society Meeting. Pennington, NJ : Electrochemical Society, 1996.

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Henrich, Victor E. The surface science of metal oxides. Cambridge : Cambridge University Press, 1994.

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Thull, Roger, H. Ju rgen Breme et C. James Kirkpatrick. Metallic biomaterial interfaces. Weinheim : Wiley-VCH, 2008.

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Tadeusz, Wierzchoń, dir. Surface engineering of metals : Principles, equipment, technologies. Boca Raton, Fla : CRC Press, 1999.

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Noguera, Claudine. Physics and chemistry at oxide surfaces. Cambridge [England] : Cambridge University Press, 1996.

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Gunnar, Borstel, Krūmin̳š A, Millers Donats et NATO Advanced Research Workshop on Defects and Surface-Induced Effects in Advanced Perovskites (1999 : Jūrmala, Latvia), dir. Defects and surface-induced effects in advanced perovskites. Dordrecht : Kluwer Academic Publishers, 2000.

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Surface scattering experiments with conduction electrons. Berlin : Springer-Verlag, 1993.

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Yang, Yuyun. Surface Modification of Biodegradable Metallic Materials with Focus on Magnesium and Iron. Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2017.

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Chapitres de livres sur le sujet "Carbonatic and metallic surface"

1

Barthés-Labrousse, Marie-Geneviève, Alessandra Beni et Patrik Schmutz. « Surface Chemistry of CMAs ». Dans Complex Metallic Alloys, 243–72. Weinheim, Germany : Wiley-VCH Verlag GmbH & Co. KGaA, 2010. http://dx.doi.org/10.1002/9783527632718.ch6.

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Fournée, Vincent, Julian Ledieu et Jeong Y. Park. « Surface Science of Complex Metallic Alloys ». Dans Complex Metallic Alloys, 155–206. Weinheim, Germany : Wiley-VCH Verlag GmbH & Co. KGaA, 2010. http://dx.doi.org/10.1002/9783527632718.ch4.

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Jeong, Hae-Kyung, Anthony Caruso et Camelia N. Borca. « Surface Segregation and Compositional Instability at the Surface of Half-Metal Ferromagnets and Related Compounds ». Dans Half-metallic Alloys, 221–39. Berlin, Heidelberg : Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11506256_7.

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Sommer, Steffen, et Sven Döring. « Surface Structuring of Metallic Materials ». Dans Springer Series in Optical Sciences, 231–44. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17659-8_11.

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Nagarajan, Vignesh, Tafadzwa Justin Chiome et Sanjay Sudan. « Surface Modification of Metallic Nanoparticles ». Dans Surface Modification of Nanoparticles for Targeted Drug Delivery, 237–44. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-06115-9_13.

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Trügler, Andreas. « Imaging of Surface Plasmons ». Dans Optical Properties of Metallic Nanoparticles, 131–47. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25074-8_5.

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Trügler, Andreas. « Influence of Surface Roughness ». Dans Optical Properties of Metallic Nanoparticles, 149–56. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25074-8_6.

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Kuroda, Kensuke. « Surface Modification with Hydrophilization ». Dans Novel Structured Metallic and Inorganic Materials, 505–21. Singapore : Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7611-5_34.

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Mas-Moruno, Carlos, Montserrat Espanol, Edgar B. Montufar, Gemma Mestres, Conrado Aparicio, Francisco Javier Gil et Maria-Pau Ginebra. « Bioactive Ceramic and Metallic Surfaces for Bone Engineering ». Dans Biomaterials Surface Science, 337–74. Weinheim, Germany : Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527649600.ch12.

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West, R. N. « Fermi Surface Studies with Positrons ». Dans Metallic Alloys : Experimental and Theoretical Perspectives, 65–72. Dordrecht : Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1092-1_8.

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Actes de conférences sur le sujet "Carbonatic and metallic surface"

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Zou, Yong, Liang Zhao, Gongming Xin et Lin Cheng. « Effect of Metallic Ion on the Formation of Calcium Carbonate Fouling ». Dans 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22312.

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Calcium carbonate (CaCO3) is the most common fouling adhering on the surface of heat exchanger. But metallic ion in natural water could affect the crystalline type of calcium carbonate. In this study, the effect of sodium ion, magnesium ion and aluminum ion on crystalline type and morphology of CaCO3 were reported. The experimental results indicate that the addition of sodium ion has no obvious role for changing the crystalline type of CaCO3, only calcite was obtained and the lattice parameter of calcite has a little variation depending on the concentration of sodium ion. However, the addition of magnesium and aluminum ion prompts obviously the formation of aragonite. In order to clarify the mechanism about the effect of metallic ion on lattice stability of calcium carbonate, the energies and electronic structures for the calcite with sodium, magnesium or aluminum inclusion have been determined from first-principle calculations. The calculated results indicate magnesium and aluminum inclusion has more effects on the stability of calcite than that of sodium inclusion.
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Dosser, Larry R., Carl J. Kershner, David J. Haas, Rand Biggers, Noah Boss, Donald L. Dorsey, Iman Maartense, Rama Nekkanti et Gregory Kozlowski. « Laser surface texturing of metallic substrates ». Dans ICALEO® 2000 : Proceedings of the Laser Materials Processing Conference. Laser Institute of America, 2000. http://dx.doi.org/10.2351/1.5059460.

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Jafari, M. R., A. Zolanvari, J. Nezamdost, S. K. Tripathi, Keya Dharamvir, Ranjan Kumar et G. S. S. Saini. « Surface Plasmon Polaritons on Metallic Nanoring ». Dans INTERNATIONAL CONFERENCE ON ADVANCES IN CONDENSED AND NANO MATERIALS (ICACNM-2011). AIP, 2011. http://dx.doi.org/10.1063/1.3653759.

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Rakowski, James M., Charles P. Stinner, Mark Lipschutz et J. Preston Montague. « Metallic Alloys for Primary Surface Recuperators ». Dans ASME Turbo Expo 2006 : Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90680.

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The efficiency of small and intermediate-size gas turbine engines can be significantly increased by the use of a primary surface recuperator, which uses waste heat from the exhaust gas to preheat the compressor discharge air before it enters the combustor. The result is lower fuel consumption to reach a particular firing temperature. The construction and operation of a primary surface recuperator present numerous challenges in the area of materials selection. Experiences with stainless steels and nickel-base alloys in construction and application in Solar Turbines’ Mercury 50 gas turbine will be presented, along with the results of extensive laboratory creep and oxidation testing and post-test evaluation. Oxidation testing in humidified air has been carried out on a variety of commercially available stainless steel and nickel-base alloy thin foils considered as materials of construction for primary surface recuperators. Two predominant degradation modes have been identified. The active mode generally depends on the exposure conditions and the alloy composition. Alloys which are rich in iron tend to suffer from accelerated oxidation, while alloys with higher chromium and nickel contents tend to exhibit oxide scale evaporation via the formation of volatile chromium-bearing species. The active mechanism is evident in the oxidation kinetics, the oxide scale morphology and composition, and in observations of compositional changes in the metal alloy substrate.
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Alfakher, Basil, Abdullah Al Moajil, Luai Alhamad et Sajjad Aldarweesh. « Dual Diversion System for HT Acid Fracturing Treatments ». Dans International Petroleum Technology Conference. IPTC, 2023. http://dx.doi.org/10.2523/iptc-23083-ea.

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Abstract Acid fracturing is a common stimulation technique used on low permeability carbonate reservoirs to enhance the productivity and deliverability of hydrocarbons. The success of acid fracturing treatments ultimately depends on the created fracture geometry, complexity and surface area. To maximize these parameters, it is imperative to include a fluid diversion strategy in the treatment design. The use of high viscosity fluids and solid particles is well addressed in the literature as effective diversion methodologies. In this study, the benefits of a dual diversion system composed of solid polymer-based particulate diverters suspended in a viscoelastic surfactant (VES) fluid were investigated for high temperature acid fracturing. The degradation profile of the solid particulates was examined for different temperatures (ranging from 250 to 300°F) in different fluid systems (15 wt% HCl, spent HCl and KCl brine). The selection of fluids was also made to ensure the compatibility of the resulting diverter monomer solution with expected formation fluids. The viscosity of the VES system was examined at 275°F to ensure its thermal stability. The bridging capability of the dual diverter system was assessed using a filter press apparatus with a slotted metallic disk by measuring fluid leak-off as a function of time. Results showed degradation rates increased with increasing temperature where a soaking time of 4 hours at 300°F was enough to fully degrade the solid particles as opposed to only 8% weight loss at 250°F for the same soaking time. Results also indicated faster degradation in more acidic environments where almost full degradation was observed in 15 wt% HCl at 250°F and 4 hours soaking time. The VES fluid system maintained sufficient viscosity for solid diverter carry with approximately 94 cP at 275°F and 100 s-1 shear rate. Bridging tests indicated the capability of the dual diverter system to completely plug the slots on the metallic disks and stopping any fluid leak-off up to 800 psi in a filter press apparatus. This paper presents a full methodical study of an innovative dual diversion system for application in high temperature acid fracturing treatments. The paper also presents design optimization considerations in order to achieve successful diversion without causing any permanent formation damage.
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Zhang, F. S., R. H. Wang, H. A. Macleod, R. E. Parks et M. R. Jacobson. « Surface Plasmon Detection Of Surface Contamination Of Metallic Film Surfaces ». Dans Technical Symposium Southeast, sous la direction de A. Peter M. Glassford. SPIE, 1987. http://dx.doi.org/10.1117/12.967076.

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Anastasi, Robert F., et Eric I. Madaras. « Terahertz NDE for metallic surface roughness evaluation ». Dans Nondestructive Evaulation for Health Monitoring and Diagnostics, sous la direction de Aftab A. Mufti, Andrew L. Gyekenyesi et Peter J. Shull. SPIE, 2006. http://dx.doi.org/10.1117/12.659463.

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Wonkyu Choi, Jeong-Seok Kim, Ji-Hoon Bae, Gil-Young Choi et Jong-Seok Chae. « Small RFID tag antenna for metallic surface ». Dans 2008 Asia Pacific Microwave Conference. IEEE, 2008. http://dx.doi.org/10.1109/apmc.2008.4958402.

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Bardt, Jeffrey, Nathan Mauntler, Gerald Bourne, Tony L. Schmitz, John C. Ziegert et W. Gregory Sawyer. « Metallic Glass Surface Patterning by Micro-Molding ». Dans ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81099.

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The micro-molding of bulk amorphous metal to create sub-micrometer to sub-millimeter surface features was investigated. The goal was to demonstrate the reproduction of such features in a metallic material from a master. The bulk metallic glass material was embossed between the glass transition and crystallization temperatures. Silicon wafers patterned by deep reactive ion etching were used as masters. The patterns were designed to test the effects and interactions of aspect ratios, geometry, and spatial proximity. In addition to these patterns, a master was developed to mold two-dimensional channel geometries. Comparisons between the replicated features and the molds are provided.
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Ocelík, V., U. de Oliveira et J. Th M. De Hosson. « Metallic laser clad coatings : on the processing-microstructure-property relationships ». Dans CONTACT/SURFACE 2009. Southampton, UK : WIT Press, 2009. http://dx.doi.org/10.2495/secm090041.

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Rapports d'organisations sur le sujet "Carbonatic and metallic surface"

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Atanasov, I. Surface Decontamination Technology of Metallic Radioactive Waste. Prof. Marin Drinov Publishing House of Bulgarian Academy of Sciences, mars 2018. http://dx.doi.org/10.7546/engsci.lv.18.01.06.

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Dai, Weitao. Surface modes at metallic an photonic crystal interfaces. Office of Scientific and Technical Information (OSTI), janvier 2009. http://dx.doi.org/10.2172/985309.

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Schwarz, Udo. Atomic-Scale Surface Studies of Bulk Metallic Glasses. Office of Scientific and Technical Information (OSTI), juillet 2022. http://dx.doi.org/10.2172/1875750.

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Davids, P. S., F. Intravia et Diego A. Dalvit. Geometrically induced surface polaritons in planar nanostructured metallic cavities. Office of Scientific and Technical Information (OSTI), janvier 2014. http://dx.doi.org/10.2172/1114411.

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Leung, P. T., Young S. Kim et Thomas F. George. Roughness-Induced Resonance for Molecular Fluorescence Near a Corrugated Metallic Surface. Fort Belvoir, VA : Defense Technical Information Center, juillet 1988. http://dx.doi.org/10.21236/ada197685.

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Shelton, William, et Ye Xu. Theoretical investigation of surface chemical reactivity of compositionally disordered multi-metallic alloys. Office of Scientific and Technical Information (OSTI), janvier 2023. http://dx.doi.org/10.2172/1908561.

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Velev, Orlin D., Eric W. Kaler et Abraham M. Lenhoff. Characterization and Optimization of Novel Nanostructured Metallic Substrates for Surface Enhanced Raman Spectroscopy. Fort Belvoir, VA : Defense Technical Information Center, décembre 2001. http://dx.doi.org/10.21236/ada398973.

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Clayton, Clive R. A Surface Analytical Investigation of the Influence of Sulphate Reducing Bacteria on Metallic Corrosion. Fort Belvoir, VA : Defense Technical Information Center, mars 1993. http://dx.doi.org/10.21236/ada262357.

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Smith, Randall. Investigations of the Air-Water Interface : A Structural Analysis of Metallic Surface Films and Aquatic Surface Films by Comparative Microscopy. Portland State University Library, janvier 2000. http://dx.doi.org/10.15760/etd.2303.

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Slattery, Kevin. Unsettled Topics on Surface Finishing of Metallic Powder Bed Fusion Parts in the Mobility Industry. SAE International, janvier 2021. http://dx.doi.org/10.4271/epr2021001.

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Laser and electron-beam powder bed fusion (PBF) additive manufacturing (AM) technology has transitioned from prototypes and tooling to production components in demanding fields such as medicine and aerospace. Some of these components have geometries that can only be made using AM. Initial applications either take advantage of the relatively high surface roughness of metal PBF parts, or they are in fatigue, corrosion, or flow environments where surface roughness does not impose performance penalties. To move to the next levels of performance, the surfaces of laser and electron-beam PBF components will need to be smoother than the current as-printed surfaces. This will also have to be achieve on increasingly more complex geometries without significantly increasing the cost of the final component. Unsettled Topics on Surface Finishing of Metallic Powder Bed Fusion Parts in the Mobility Industry addresses the challenges and opportunities of this technology, and what remains to be agreed upon by the industry.
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