Relevant bibliographies by topics / Mechanical et Tribological properties

Academic literature on the topic 'Mechanical et Tribological properties'

Author: Grafiati
Published: 22 June 2024

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Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Journal articles on the topic "Mechanical et Tribological properties":

1

Sha, W. "Comment on “Modeling of tribological properties of alumina fiber reinforced zinc–aluminum composites using artificial neural network” by K. Genel et al. [Mater. Sci. Eng. A 363 (2003) 203]." Materials Science and Engineering: A 372, no. 1-2 (May 2004): 334–35. http://dx.doi.org/10.1016/j.msea.2004.01.001.

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Krbata, Michal, Robert Ciger, Marcel Kohutiar, Maria Sozańska, Maroš Eckert, Igor Barenyi, Marta Kianicova, et al. "Correction: Krbata et al. Effect of Supercritical Bending on the Mechanical & Tribological Properties of Inconel 625 Welded Using the Cold Metal Transfer Method on a 16Mo3 Steel Pipe. Materials 2023, 16, 5014." Materials 17, no. 3 (January 29, 2024): 658. http://dx.doi.org/10.3390/ma17030658.

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Danilova, Sakhayana N., Sofia B. Yarusova, Yuri N. Kulchin, Ivan G. Zhevtun, Igor Yu Buravlev, Aitalina A. Okhlopkova, Pavel S. Gordienko, and Evgeniy P. Subbotin. "UHMWPE/CaSiO3 Nanocomposite: Mechanical and Tribological Properties." Polymers 13, no. 4 (February 14, 2021): 570. http://dx.doi.org/10.3390/polym13040570.

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This paper studied the effect of additives of 0.5–20 wt.% synthetic CaSiO3 wollastonite on the thermodynamic, mechanical, and tribological characteristics and structure of polymer composite materials (PCM) based on ultra-high-molecular weight polyethylene (UHMWPE). Using thermogravimetric analysis, X-ray fluorescence, scanning electron microscope, and laser light diffraction methods, it was shown that autoclave synthesis in the multicomponent system CaSO4·2H2O–SiO2·nH2O–KOH–H2O allows one to obtain neeindle-shaped nanosized CaSiO3 particles. It was shown that synthetic wollastonite is an effective filler of UHMWPE, which can significantly increase the deformation-strength and tribological characteristics of PCM. The active participation of wollastonite in tribochemical reactions occurring during friction of PCM by infrared spectroscopy was detected: new peaks related to oxygen-containing functional groups (hydroxyl and carbonyl) appeared. The developed UHMWPE/CaSiO3 materials have high wear resistance and can be used as triboengineering materials.
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Wyatt, Brian C., Andreas Rosenkranz, and Babak Anasori. "2D MXenes: Tunable Mechanical and Tribological Properties." Advanced Materials 33, no. 17 (March 18, 2021): 2007973. http://dx.doi.org/10.1002/adma.202007973.

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Hedenqvist, Per, Staffan Jacobson, and Sture Hogmark. "Tribological PVD coatings — characterisation of mechanical properties." Surface and Coatings Technology 97, no. 1-3 (December 1997): 212–17. http://dx.doi.org/10.1016/s0257-8972(97)00192-8.

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Elzubair, A., N. F. de Oliveira, F. Munhoz, C. Flor, F. Fiat, N. Baghdadli, S. S. Camargo, and G. S. Luengo. "Tribological and Mechanical Properties of Brazilian Hair." Biotribology 12 (December 2017): 33–42. http://dx.doi.org/10.1016/j.biotri.2017.06.001.

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Sun, Feng Yan, Qing Mei Wang, and Jian Jun Qu. "Mechanical and Tribological Properties of Fiber Reinforced Ekonol Composites." Advanced Materials Research 219-220 (March 2011): 337–40. http://dx.doi.org/10.4028/www.scientific.net/amr.219-220.337.

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Carbon fiber(CF) and Kevlar fiber(KF) were used as reinforcing agents to fill Ekonol(EK) respectively. Mechanical and tribological properties of composite systems were tested. When CF was used as the EK reinforced filler, the mechanical properties of EK composites couldn’t be enhanced obviously, and the tribological properties were reduced. When KF was filled in EK matrix, it could greatly improve the impact strength of EK composite by reducing crack formation and inhibiting crack propagation. The KF/EK composite has good tribological properties. It keeps the high friction low wear performance advantage of EK, and solves its problem of forming difficulty. In EK composite, KF plays the role of reinforcing agents and friction modifier at the same time, and then it is a kind of excellent EK reinforced filler.
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Lu, Y., J. Chen, H. Cui, and H. Zhou. "Mechanical and tribological properties of titanium reinforced polybenzimidazole." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 223, no. 7 (June 2, 2009): 971–75. http://dx.doi.org/10.1243/13506501jet595.

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Cheng, Y. H., T. Browne, B. Heckerman, and E. I. Meletis. "Mechanical and tribological properties of nanocomposite TiSiN coatings." Surface and Coatings Technology 204, no. 14 (April 2010): 2123–29. http://dx.doi.org/10.1016/j.surfcoat.2009.11.034.

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Chen, Zhaobin, Tongsheng Li, Yuliang Yang, Xujun Liu, and Renguo Lv. "Mechanical and tribological properties of PA/PPS blends." Wear 257, no. 7-8 (October 2004): 696–707. http://dx.doi.org/10.1016/j.wear.2004.03.013.

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Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "Mechanical et Tribological properties":

1

Gui, Yunfang. "Mise au point par pulvérisation cathodique magnétron en condition réactive et caractérisations mécaniques et tribologiques de revêtements de phases Magnéli de titane (TinO2n-1)." Thesis, Belfort-Montbéliard, 2014. http://www.theses.fr/2014BELF0235/document.

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Cette étude porte sur l’élaboration et la caractérisation des propriétés de revêtements de phases Magnéli de titane (TinO2n-1) en vue de leur application tribologique. Les dépôts ont été élaborés par pulvérisation cathodique magnétron en condition réactive à partir de cible métallique de titane dans une atmosphère O2/Ar sur un porte substrat rotatif chauffant.La première partie de l’étude appuie sur la synthèse de monocouches de phases Magnéli de titane. L’influence des principaux paramètres d’élaboration (débit d’oxygène, température du porte substrat) a été analysé au regard de la structure et de la morphologie des revêtements synthétisés. Ensuite, des bicouches TinO2n-1/AlTiN ont été synthétisées par la technique de pulvérisation cathodique magnétron et de l’arc électrique sous basse pression, respectivement. Cependant, la phase et l’épaisseur de la couche de surface d’oxyde de titane ainsi que l’épaisseur de la sous-couche AlTiN ont été choisies comme les paramètres à étudier.La deuxième partie concerne les propriétés mécaniques (nano dureté instrumenté, module d’élasticité, test Mercedes et scratch test) et tribologiques (test pion disque) des revêtements monocouches et bicouches. Une attention particulière a été portée à l’influence de la température du test de frottement sur le taux d’usure des revêtements duplex
The present work deals with the synthesis and the structural, mechanical and tribological characterization of titanium Magnéli phases (TinO2n-1) coatings for tribological application. The thin films were prepared by reactive magnetron sputtering from titanium target in a reactive O2/Ar gas mixture using a rotating and heating substrate holder.The first part of the study is based on the synthesis of titanium Magneli phase monolayers. The influence of the main synthesis parameters (oxygen flow rate, temperature of the substrate holder) was analyzed in relation with the structure and the morphology of the synthesized coatings. Then TinO2n-1/AlTiN bilayers were synthesized by the reactive magnetron sputtering and the low pressure electric arc techniques, respectively. The phase and the thickness of the top layer of titanium oxide and the thickness of the under layer AlTiN were selected as the parameters to be studied.The second part concerns the mechanical properties (nano hardness instrumented, elasticity modulus, Mercedes test and scratch test) and tribological properties (pin on disc test) of the monolayer and bilayer coatings. Particular attention was paid to the influence of the friction test temperature on the bilayer coatings wear rates
2

Tonicello, Emmanuel. "Etude et modélisation de la fatigue de contact en présence d’indentation dans le cas de roulements tout acier et hybrides." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0047/document.

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Le 32CrMoV13 nitruré est un matériau à gradient de propriétés utilisé pour la réalisation de bagues de roulements aéronautiques. Il présente l’avantage d’être dur en surface et ductile à cœur, facilitant ainsi la lutte contre les effets de la pollution des contacts par les lubrifiants. De plus, afin d’améliorer les performances des roulements, la tendance est à l’utilisation de céramique (nitrure de silicium Si3N4) pour les éléments roulants à la place de l’acier (M50). Ainsi, le travail de thèse proposé ici est l’étude du comportement en fatigue de contact en présence d’indentations pour deux couples de matériaux (32CrMoV13 nitruré / M50 et 32CrMoV13 nitruré / Si3N4). Ce comportement est principalement orienté en terme de durée de vie du contact indenté par l’intermédiaire d’un critère d’amorçage de fissures. Une étude des propriétés mécaniques du 32CrMoV13 nitruré, nécessaires à l’application du critère, a été réalisée. La loi d’écrouissage et l’ouverture micro-plastique cyclique de la couche nitrurée du 32CrMoV13 nitruré ont été identifiées. Puis, par l’intermédiaire de défauts géométrique de type trous cylindriques, les propriétés d’amorçage de fissures ont été étudiées lors d’essais de compression uniaxiale. Le comportement en fatigue de contact en présence d’indentations a été étudié sur machine bi-disques. Ces essais ont permis de caractériser la différence de comportement du 32CrMoV13 nitruré, et indenté, dans un contact acier / acier et acier / céramique. L’effet du glissement a notamment été mis en évidence. Ces études expérimentales ont été couplées avec des simulations numériques afin d’étalonner le modèle physique d’amorçage de fissures et d’en valider sa bonne représentativité. En conclusion un modèle de prédiction de durée de vie en fatigue de roulement a été proposé. Il est particulièrement adapté aux cas où des contraintes résiduelles sont présentes, par exemple suite à l’indentation des surfaces. Le modèle s’appuie sur la caractérisation mécanique des couches traitées thermo-chimiquement de l’acier 32CrMoV13 nitruré
The nitrided 32CrMoV13 steel is a gradient properties material used for the production of aeronautical bearing rings. The principal advantages are its surface hardness and core ductility, useful against debris denting. Moreover, to improve rolling bearing performances, ceramic balls (silicon nitride Si3N4) instead of steel (M50). The present study aims to investigate the contact fatigue performance in presence of indentation for two pairs of materials (nitrided 32CrMoV13 steel / M50 and nitrided 32CrMoV13 steel / Si3N4). This performance is mainly oriented in terms of lifetime of the indented contact by a crack initiation criterion. A study of the mechanicals properties of the nitrided 32CrMoV13 steel, required for the application of the criterion, is then performed. It allows to characterize the hardening law and the cyclic micro-plastic behavior of the nitrided layer of the nitrided 32CrMoV13 steel. Crack initiation properties of the nitrided surface layer have been evaluated by compression tests on thin hollow cylindrical specimens with small cylindrical holes. The contact fatigue behavior in presence of indentations was studied on a high-speed twin-disks machine. These tests allowed to characterize the difference in behavior of nitrided 32CrMoV13 steel (indented) in a steel-to-steel contact or steel-to-ceramic contact. The major effect of sliding has been highlighted. All these experimental studies were coupled with numerical simulations to calibrate the physical model of crack initiation and to show its capabilities. In conclusion a new model of rolling contact fatigue life has been proposed. It is specifically adapted to operation in presence of residual stresses such as resulting from debris denting. The model uses mechanical properties that have been identified for thermo-chemically treated layers of nitrided 32CrMoV13 steel
3

Papy, Kévin. "Compréhension et maîtrise de la mise en oeuvre des cermets par procédé de fusion laser sur lit de poudre pour la réalisation de pièces anti-usure." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2023. http://www.theses.fr/2023ECDL0025.

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Technogenia® est une entreprise française, créée en 1979 et est spécialisée dans les revêtements soudés anti-usure en carbure de tungstène (WC). Dans le cadre de la thèse, Technogenia® souhaite évaluer la pertinence de réaliser des pièces anti-usure à base de carbure de tungstène par technologie de fabrication additive. L’objectif premier de l’entreprise est d’utiliser la technologie de fusion laser sur lit de poudre (L-PBF), afin de produire des pièces à base de carbure de tungstène se rapprochant des caractéristiques mécaniques des pièces en WC monobloc qui sont réalisées par procédé conventionnel. Cette thèse a pour objectif d’étudier la faisabilité de réalisation des pièces à base de carbure de tungstène et de caractériser les microstructures et les propriétés mécaniques et d’usure des pièces réalisées par fabrication additive. Les propriétés des matériaux obtenus par procédé L-PBF seront comparées aux propriétés connues de pièces conçues par procédé conventionnel. Dans un premier temps, deux poudres à base de carbure de tungstène avec des liants métalliques (carbures cémentés) sont sélectionnées afin de réaliser une optimisation paramétrique pour le procédé L-PBF. Cette étape est réalisée en analysant l’influence des principaux paramètres du procédé (puissance laser, vitesse de balayage, stratégie de balayage, écart vecteur, épaisseur de couche, …) sur les matériaux. Un plan d’expérience est défini en plusieurs étapes, comme la réalisation de cordons, de surfaces et de cubes dans le but de déterminer les principaux paramètres. Deux types de post-traitement thermique sont réalisés afin d’étudier l’influence sur les matériaux et d’éliminer certains défauts structurels. Les différences microstructurales entre les deux liants sont analysées et étudiées. De nombreux phénomènes dû au procédé laser sont observés et commentés lors de l’analyse des échantillons. Dans un deuxième temps, une étape de caractérisation mécanique et tribologique est réalisée sur les échantillons fabriqués avec succès. Différents tests mécaniques (dureté, ténacité, résilience) sont réalisés en vue de caractériser et de comparer les matériaux obtenus par L-PBF avec un matériau de référence réalisé par procédé conventionnel. Pour terminer, la résistance à l’usure des matériaux obtenus est étudiée et comparée lors de deux différents tests tribologiques
Technogenia® is a French company, founded in 1979, specialized in hardfacing solutions based on tungsten carbide welding overlays. As part of the thesis, Technogenia® wishes to assess the suitability of using Additive Manufacturing technology to produce wear-resistant parts based on tungsten carbide. The company's primary objective is to use laser-powder bed fusion (L-PBF) technology to produce tungsten carbide-based parts that approach the mechanical characteristics of tungsten carbide-based parts made by conventional processes. The aim of this thesis is to study the feasibility of producing tungsten carbide-based parts, and to characterize the microstructures and mechanical and wear properties of parts produced by Additive Manufacturing. The properties of materials obtained using the L-PBF process will be compared with the known properties of parts produced by conventional processes. Firstly, two tungsten carbide-based powders with metal binders (cemented carbides) are selected for parametric optimization in the L-PBF process. This step is carried out by analyzing the influence of the main process parameters (laser power, scanning speed, scanning strategy, vector deviation, layer thickness, etc.) on the materials. An experimental design is defined in several steps, such as the production of beads, surfaces and cubes, in order to determine the main parameters. Two types of thermal post-treatment are carried out to study the influence on the materials and to eliminate certain structural defects. Microstructural differences between the two binders are analyzed and studied. Numerous phenomena due to the laser process are observed and commented on during sample analysis. Secondly, the samples successfully manufactured are subjected to mechanical and tribological characterization. Various mechanical tests (hardness, toughness, impact strength) are carried out to characterize and compare L-PBF materials with a reference material produced by conventional methods
4

Ahmed, Omer. "Tribological and Mechanical properties of Multilayered Coatings." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501763970144729.

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Sow, Mourtada Aly. "Alliages à Haute Entropie (AHE) pour revêtements hautes performances." Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILR026.

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L’objectif de cette thèse est de développer des revêtements haute performance à partir de poudres d’alliage à haute entropie (AHE) et de les caractériser. Ce travail est divisé en deux parties. La première consiste à élaborer des poudres AHE de la famille Al, Cr, Fe, Mn et Mo alliées par mécanosynthèse.Ces poudres ont été caractérisées par DRX, MEB et Mössbauer. Elles cristallisent dans deux structures cubiques centrées (CC1 et CC2). Les traitements thermiques des poudres (500, 650, 800 et 950 °C) ont révélé une bonne stabilité structurale jusqu’à 650 °C / 1h. À 800 °C /1h et 950 °C pendant 1h et 4h, une évolution structurale des poudres a été observée. La phase CC1 disparaît au profit de la phase CC2 et de carbures de types M23C6 et M6C. À l’issue de ces caractérisations, la poudre de composition chimique 19Al-22Cr-34Fe-19Mn-6Mo a été retenue et produite en quantité suffisante par mécanosynthèse (poudre A) et par mélange (poudre B).Dans la deuxième partie de ce travail, des revêtements AHE épais et minces ont été élaborés respectivement par fusion laser et par pulvérisation magnétron à partir des poudres A et B. Les revêtements épais ont été déposés sur des substrats en acier. La structure et la microstructure des dépôts ont été minutieusement caractérisées par DRX, MEB, EDS, EBSD et MET. Les résultats de ces caractérisations ont révélé que les dépôts épais sont chimiquement hétérogènes. De plus, ces revêtements ont mis en évidence des structures et des microstructures de solidification différentes selon les conditions de dépôts et les poudres (A ou B) utilisées pour réaliser ces revêtements.Les revêtements AHE minces ont été déposés sur wafer de silicium et sur substrats en acier. Les conditions de dépôts des films minces ont été optimisées et la composition chimique a été contrôlée. Les traitements thermiques des films minces ont révélé une bonne stabilité structurale et microstructurale jusqu’à 800 °C/ 72h. La résistance à la corrosion, les propriétés mécaniques et les performances tribologiques ont été évaluées
This thesis aims to develop high performance coatings from high entropy alloys powders (HEA) and to characterize them. This work is divided in two parts. The first part consists in the synthesis of HEA powders for a family of alloy elements Al, Cr, Fe, Mn and Mo by mechanical alloying.These powders were characterized by XRD, SEM and Mössbauer spectrometry. These powders have a CC1 and CC2 type crystal structure. The heat treatment of the powders (500, 650, 800 and 950 °C) allowed to obtain a structural stability at 650 °C/ 1h, at 800 °C/ 1h and 950°C/ 1h and 4h, a structural evolution of the powders was noticed. The CC1 phase disappears in favor of the CC2 phase and the M23C6 et M6C type carbides. At the result of these characterizations, the chemical composition 19Al-22Cr-34Fe-19Mn-6Mo powder was preserved and produced in suffering quantities by mechanical synthesis (powder A) and by mixing (powder B).In the second part of this work, thick and thin HEA coatings were developed by laser fusion and magnetron sputtering respectively from A and B powders. The thick laser-melted coatings were deposited on steel substrate. The structure and microstructure of the deposits were carefully characterized by XRD, SEM, EDS, EBSD and TEM. The results of these characterizations revealed that the thick deposits are chemically heterogeneous. Moreover, these coatings showed different structures and microstructures of solidification depending on the deposition conditions and the powders (A or B) pre-deposited to realize these coatings.The HEA thin film were deposited on silicon wafer and steel substrate. The deposition conditions of the thin films were optimized and the chemical composition was controlled. The heat treatments of the thin films revealed good structural and microstructural stability up to 800 °C/ 72h. Corrosion resistance, mechanical properties and tribological performances were evaluated
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Hoskins, Thomas James. "The mechanical and tribological properties of PEEK gears." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6047/.

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This research compares the dynamic performance of injection moulded and laser sintered poly-ether-ether-ketone (PEEK), outlining the potential of laser sintering as a manufacturing method for high performance polymer gears. It was observed that the mechanical properties of laser sintered PEEK was a significant improvement over previous laser-sintered materials, and comparable with high performance injection-moulded materials. In addition, the coefficient of friction and wear rates were significantly below that of injection moulded PEEK. However, for direct application of the laser sintered material EOS PEEK HP3 to power transmission gears, the predominant form of failure was bending fatigue, limiting the material to low power transmission levels. Observation of the fracture surface highlighted limited amounts of plasticity, although regions of intergranular failure and fast fracture could be identified from the failed surface. In addition, the failure stress path, in the region of progressive intergranuar failure, was governed by the partially sintered particle boundaries in the material; showing a similar failure response to flexure testing. In conclusion, despite the limited amount of plasticity shown in the material failure, the tribological properties of laser sintered PEEK mean that their application to power transmission is still desirable.
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Bull, Stephen John. "The mechanical and tribological properties of ion implanted ceramics." Thesis, University of Cambridge, 1988. https://www.repository.cam.ac.uk/handle/1810/244798.

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The mechanical properties of ion implanted ceramics are primarily a function of the radiation damage produced by the implantation process. For crystalline ceramics this damage is chiefly nuclear displacements, though for glasses electronic effects have also been observed. In this study a number of single crystal and polycrystalline ceramics and a soda-lime-silica glass have been implanted with a range of ions in the energy range 90keV to 400keV and the changes in mechanical properties produced have been followed using hardness, indentation fracture and scratch testing. The damage structures which remain after implantation will control both the indentation hardness and surface fracture properties of cetamics. Changing the temperature of the substrate during implantation (in the range. 150K to 760K) has been found to alter this damage state and hence produce changes in the measured mechanical properties. In this temperature range, the effects of damage annealing at low doses were found to be minor for sapphire although for MgO damage annealing was found to result in a eduction of the radiation-induced hardening above 473K. The surface softening and stress relief accompanying amorphisation at higher doses was found to be strongly temperature dependent. Thus, the recrystallisation of amorphous material is important in determining the final mechanical properties of the implanted specimens. The tribological properties of the implanted ceramics were investigated using single pass scratch tests. Friction coefficients were found to increase with dose up to the onset of amorphisation, even when visible scratch tracks were produced. This increse is due to changes in adhesion between the slider and the flat induced by ion implantation. The reasons for these changes are as of yet unclear, though a possible explanation could be the removal of surface adsorbates which has been observed for MgO. Similar mechanical and tribological property changes observed for the polycrystalline ceramics as for the single crystal systems, but some extra effects were observed.
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Izadi, Sina. "Al/Ti Nanostructured Multilayers: from Mechanical, Tribological, to Corrosion Properties." Scholar Commons, 2016. https://scholarcommons.usf.edu/etd/6265.

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Nanostructured metallic multilayers (NMMs) are well-known for their high strength in smaller bilayer thicknesses. Six Al/Ti (NMM) with different individual layer thickness were tested for their mechanical hardness using a nanoindentation tool. Individual layer thicknesses were chosen carefully to cover the whole confined layer slip (CLS) model. Nano-hardness had a reverse relation with the square root of individual layer thickness and reached a steady state at ~ 5 nm bilayer thickness. Decreasing the layer bilayer thickness from ~ 104 nm to ~ 5 nm, improved the mechanical hardness up to ~ 101%. Residual stresses were measured using grazing incident X-ray diffraction (GIXRD). Effect of residual stress on atomic structure and dislocation propagation was then investigated by comparing the amount and type of stresses in both aluminum and titanium phases. Based on the gathered data from GIXRD scans tensile stress in Ti phases, and compressive stress in Al would increase the overall coherency of structure. Wear rate in coatings is highly dependent on design and architect of the structure. NMM coatings are known to have much better wear resistance compare to their monolithic constituent phases by introducing a reciprocal architect. In current study wear rate of two Al/Ti NMMs with individual layer thicknesses of ~ 2.5 nm and ~ 30 nm were examined under normal loads of 30 µN, 60 µN, and 93 µN. Wears strokes were performed in various cycles of 1, 2, 3, 4 5 and 10. Wear rates were then calculated by comparing the 3D imaging of sample topology before and after tests. Nano-hardness of samples was measured pre and post each cycle of wear using a nanoindentation tool. The microstructure of samples below the worn surface was then characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), focus ion beam (FIB) and an optical profilometer. Orientation mapping was performed to analyze the microstructure of layers beneath the nano indents. TEM imaging from the cross section of worn samples indicated severely plastically deformed layer (SPDL) below the worn surface. Shear bands and twins are visible after wear and below the worn surface. Decreasing the layer thickness from 30 nm to 2.5 nm resulted in ~ 5 time’s better wear resistance. Nanowear caused surface hardening which consequently increased nano hardness up to ~ 30% in the sample with 2.5 nm individual layer thickness. Increasing the interfaces density of NMMs will significantly improve the corrosion resistance of coating. Reciprocal layers and consequently interfaces will block the path of aggressive content toward the substrate. Corrosion rate evolution of Al/Ti multilayers was investigated through DC corrosion potentiodynamic test. Results seem to be very promising and demonstrate up to 30 times better corrosion resistance compared to conventional sputtered monolithic aluminum. Corrosion started in the form of pitting and then transformed to the localized galvanic corrosion. Decreasing the bilayer thickness from ~ 10.4 nm to ~ 5 nm will decrease the corrosion current density (icorr) of ~ 5.42 × 10-7 (A/cm2) to ~ 6.11 × 10-10 (A/cm2). No sign of corrosion has been seen in the sample with ~ 2.5 nm individual layer thickness. Further AFM and TEM analysis from surface and cross section of NMMs indicate that a more coherent layer by layer structure improves the corrosion rate. Interfaces have a significant role in blocking the pores and imperfections inside coating.
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Luo, Huan. "Study of the plasma phenomenon in HiPIMS discharge. : Application to the reactive deposition of tantalum and hafnium carbide nanocomposite coatings and characterization of their physicochemical, structural, mechanical and oxidation resistance propertie." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCA010.

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La technologie de pulvérisation magnétron par impulsions de haute puissance (HiPIMS) a été développée et est considérée comme une méthode efficace pour la préparation des films. La technologie HiPIMS permet une bien plus grande flexibilité pour ajuster la structure et les performances du film, conduisant à des films avec des propriétés uniques qui sont souvent irréalisables dans les autres approches PVD. Cependant, le mécanisme sous-jacent du plasma pour soutenir la croissance du film impliqué est actuellement flou. De plus, la technologie HiPIMS est limitée au laboratoire, de nombreux films aux propriétés souhaitables n'ont pas été explorés dans le cadre de la pulvérisation HiPIMS. Dans ce travail, (i) le l’origine de la structure cohérente du plasma haute densité (les « spokes ») dans la décharge HiPIMS et (ii) comment la structure et les propriétés des films de TaC/a-C:H et HfC/a-C:H sont gérées par HiPIMS ont été étudiés. Dans l'étude du mécanisme de formation des « spokes », basée sur la relation de dispersion du plasma HiPIMS et l'évolution du couplage entre deux ondes azimutales, un modèle d'onde induit par couplage a été proposé. Dans l'étude des films TaC/a-C:H et HfC/a-C:H, les états des liaisons chimiques, la structure, la morphologie, les propriétés mécaniques et tribologiques, la stabilité thermique ainsi que la résistance à l'oxydation des films ont été étudiés. En comparaison avec ces films déposés par pulvérisation magnétron DC, il est démontré que la technologie HiPIMS permet une stratégie potentielle pour préparer des films TaC/a-C:H et HfC/a-C:H plus performants en termes de dureté, de coefficient de frottement et de résistance à l'usure, de résistance à l'oxydation et de stabilité thermique en modulant l'état de liaison chimique et la structure nanocomposite des films à travers un plasma réactif
High Power Impulse Magnetron Sputtering technology (HiPIMS) has been developed and considered as an effective method for film preparation. HiPIMS technology allows for much greater flexibility for manipulating film structure and performance, leading to films with unique properties that are often unachievable in the other PVD approaches. However, the underlying plasma mechanism for supporting film growth is currently blurred. Moreover, HiPIMS technology is still stationed in the laboratory, many films with desirable properties have not been explored under HiPIMS framework. In this work, (i) the driven mechanism of high density plasma coherent structure (i.e., spokes) in the HiPIMS discharge and (ii) how the structure and properties of the TaC/a-C:H and HfC/a-C:H films are regulated by HiPIMS were investigated. For the driven mechanism of spokes, based on the dispersion relationship of HiPIMS plasma and the evolution of the coupling between two azimuthal waves, the coupling-induced wave model was proposed. For the TaC/a-C:H and HfC/a-C:H films, the chemical bond states, structure, morphology, mechanical and tribological properties, thermal stability as well as oxidation resistance of the films were investigated. By comparison with DC deposited films, it is demonstrated that HiPIMS technology provides a potential strategy for preparing higher performance TaC/a-C:H and HfC/a-C:H films in terms of hardness, friction coefficient and wear resistance, oxidation resistance and thermal stability by modulating the chemical bonding state and nanocomposite structure of the films through HiPIMS reactive plasma
10

Wang, Shuo, and 王硕. "Tribological behaviour of anodised alumina nanohoneycombs." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49618131.

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Anodic alumina nanohoneycombs (AAO) have been widely used because of its convenient fabrication and controllable pores’ geometry. A lot of investigations have been conducted to study its physical and chemical properties. However, the mechanical properties, especially tribological properties, of such a popular nanomaterial still remain almost unknown. In this project, a series of scratch experiments were conducted on AAO films fabricated by a two-step anodisation method. The testing system is a G200 Nanoindenter provided by Agilent Corporation. A standard diamond Berkovich tip is used as the scratch tip. A scanning electron microscope was used to image the microstructure of the material deformation after scratching. Strengths of AAO domains with different pore regularities were compared by performing the scratch tests at constant normal loads crossing the boundaries separating these domains. Ramping load tests were carried out to show the effects of the normal load on the deformation and friction of the AAO. Scratch cycles and velocities were also varied to see their influence on friction and wear. The results show that the more ordered AAO structure has higher strength than disordered counterparts under scratch testing. The friction coefficient reduces rapidly on increasing normal load, and an explanation of this unusual behaviour is offered by considering the row-by-row deformation of the AAO structure. In multicycle scratch tests, the friction reaches a maximum at the fourth cycle. A step-like deformation behaviour was observed when the scratch velocity became extremely large, and this is probably due to the dynamic response of the instrument.
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Books on the topic "Mechanical et Tribological properties":

1

A, Glaeser William, ed. Characterization of tribological materials. Boston: Butterworth-Heinemann, 1993.

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Davim, J. Paulo, and Rajnesh Tyagi. Processing techniques and tribological behavior of composite materials. Hershey PA: Engineering Science Reference, 2015.

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Ronkainen, Helena. Tribological properties of hydrogenated and hydrogen-free diamond-like carbon coatings. Espoo [Finland]: Technical Research Centre of Finland, 2001.

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Barton, James. Le verre, science et technologie. Les Ulis: EDP sciences, 2005.

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Poubanne, Philippe. Etude et modelisation du comportement mecanique d'un superalliage monocristallin pour aube de turbine. Chatillon, France: Office national d'etudes et de recherches aerospatiales, 1989.

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International, Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading (7th 2003 Porto Portugal). 7th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading =: 7e Congrès international sur le comportement mécanique et physique des matériaux sous sollicitations dynamiques : September 8-12, 2003, Porto, Portugal. Les Ulis, France: EDP Sciences, 2003.

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International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading (6th 2000 Kraków, Poland). 6th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading =: 6e Congrès International sur le comportement mécanique et physique des matériaux sous sollicitations dynamiques : September 25-29, 2000, Kraków, Poland. Les Ulis Cedex A, France: EDP Sciences, 2000.

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International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading (6th 2000 Kraków, Poland). 6th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading: Proceedings, September25-29, 2000, Kraków, Poland : DYMAY 2000 = 6e Congrès international sur le comportement mécanique et physique des matériaux sous sollicitations dynamiques. Les Ulis, France: Éditions de physique, 2000.

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International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading (8th 2006 Dijon, France). 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading: 8e Conférence internationale sur le comportement mécanique et physique des matériaux sous sollicitation dynamique : proceedings : DYMAT 2006 : Dijon, France, 11-15 September, 2006. Les Ulis, France: Éditions de physique, 2006.

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International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading (8th 2006 Dijon, France). 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading =: 8e Conférence Internationale sur le Comportement Mécanique et Physique des Matériaux sous Sollicitations Dynamiques : proceedings : September 11-15, 2006, Dijon, France. Les Ulis, France: Éditions de physique, 2006.

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Book chapters on the topic "Mechanical et Tribological properties":

1

Kumar, Ram, and Deepak Jain. "Tribological Properties of Different Micro-abrasives in Friction Materials." In Lecture Notes in Mechanical Engineering, 347–52. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-1859-3_32.

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Rajkumar, K., K. Vishal, and P. Sabarinathan. "Tribological Properties of PEEK Reinforced with Synthetic Diamond Composite." In Lecture Notes in Mechanical Engineering, 371–80. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4745-4_33.

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Belyak, O. A., I. V. Kolesnikov, and T. V. Suvorova. "Modeling of Tribological Properties of Self-lubricating Composite Materials." In Lecture Notes in Mechanical Engineering, 479–88. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-38126-3_48.

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Krishna, P. Vamsi, and A. Prasad Reddy. "Mechanical and Tribological Properties of AA6061-2SiCp-xGr." In Handbook of Polymer and Ceramic Nanotechnology, 1–35. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-10614-0_66-1.

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Lu, Yanhua, Jianmin Chen, Haixia Cui, and Huidi Zhou. "Mechanical and Tribological Properties of Titanium Reinforced Polybenzimidazole." In Advanced Tribology, 812–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03653-8_269.

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Krishna, P. Vamsi, and A. Prasad Reddy. "Mechanical and Tribological Properties of AA6061-2SiCp-xGr." In Handbook of Polymer and Ceramic Nanotechnology, 487–521. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-40513-7_66.

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Wang, Runzi, Ao Li, Minzi Zhou, Jiawei Tong, and Ruitao Peng. "Study on Tribological Properties of ILs-MWCNTs/MoS2 Hybrid Nanofluid." In Advances in Mechanical Design, 1947–67. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7381-8_122.

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Boggarapu, Vasavi, Raghavendra Gujjala, Shakuntala Ojha, Rakesh Kanakam, Somaiah Chowdary Mallampati, and Praveen Kumar Jatothu. "Tribological Properties of Metal Particulate Reinforced Polymeric Functionally Graded Materials." In Lecture Notes in Mechanical Engineering, 463–70. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4606-6_43.

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Gurunagendra, G. R., B. R. Raju, C. Ravi Keerthi, Vijayakumar Pujar, D. P. Girish, and H. S. Siddesha. "Optimization of Tribological Properties of Microparticulate-Reinforced ZA-27 Composites." In Lecture Notes in Mechanical Engineering, 141–55. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1388-4_14.

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Tiwari, Sunil Kumar, Shashank Pal, Abhishek Sharma, Ankit Dasgotra, and Jitendra Kumar Pandey. "Investigation of Tribological Properties of Stir Cast Hybrid Aluminum Composites." In Lecture Notes in Mechanical Engineering, 125–32. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3135-1_14.

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Conference papers on the topic "Mechanical et Tribological properties":

1

Bhushan, Bharat. "Tribology on the Macro- to Nanoscales of MEMS Materials: A Review." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-1252.

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Abstract Silicon-based MEMS devices are made from single-crystal silicon, LPCVD polysilicon films and other ceramic films (Bhushan, 1998). For high temperature applications, SiC films are being developed to replace polysilicon films. Tribology in the MEMS devices requiring relative motion is of importance. Atomic force/friction force microscopy (AFM/FFM) and nanoindentation techniques (Bhushan et al., 1995; Bhushan, 1995, 1998) have been used for tribological studies on micro- to nanoscale on materials of interest. These techniques have been used to study surface roughness, friction, scratching/wear, indentation and boundary lubrication of bulk and treated silicon, polysilicon films and SiC films (Bhushan, 1996a, b; Bhushan et al., 1994, 1997a, b, 1998; Koinkar and Bhushan, 1997; Li and Bhushan, 1998; Sundararajan and Bhushan, 1998; Zhao and Bhushan, 1998). Macroscale friction and wear tests have also been conducted using the ball-on-flat tribometer. (Bhushan and Venkatesan, 1993; Gupta et al., 1993, 1994a, b; Venkatesan and Bhushan, 1993, 1994). Measurements of microscale and macroscale friction forces show that friction values on both scales of all the silicon samples are about the same among different silicon materials and higher than that of SiC. The microscale values are lower than the macroscale values as there is less ploughing contribution in the microscale measurements. Surface roughness has an effect on friction. In microscale and macroscale tests, C+-implanted, oxidized and PECVD oxide-coated single-crystal silicon samples exhibit much larger scratching and wear resistance as compared to untreated samples. Polysilicon films and undoped single-crystal silicon show similar friction and wear characteristics. Doping of polysilicon film does not affect its tribological properties. Microscratching, microwear and nanoindentation, and macroscale friction and wear studies indicate that SiC films are superior when compared to the other materials currently used in MEMS devices. Higher hardness and fracture toughness of the SiC film is believed to be responsible for its superior mechanical integrity and lower friction. Chemically grafted self-assembled monolayers and chemically-bonded liquid lubricants show promising performance for boundary lubrication in MEMS devices.
2

Semenov, Sergey Y., and Baki M. Cetegen. "Experiments on Deposition of Nano-Structured Alumina-Titania Coatings by Normal Detonation Waves." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/htd-24370.

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Abstract Deposition of functional coatings for wear, corrosion and thermal resistance is a commonly employed process in many industries. Coatings are typically applied by spraying powders through a high temperature and high velocity gas jet. Powder particles are heated up and accelerated in the jet and they subsequently impact onto the surface to be coated. The two common means of depositing such coatings are high velocity oxy-fuel (HVOF) torches and plasma jets [1,2]. Typically, materials with lower melting points such as metallics are sprayed by HVOF systems whereas high melting point ceramic materials require higher temperature jets and they are applied using plasma torch systems. The HVOF systems produce combustion jets that can be supersonic at the jet exit (typically greater than kilometer per second velocities) and can reach gas temperatures up to 3000 K using pure oxygen as the oxidant. On the other hand, plasma jets can produce velocities and temperatures of the order of 102 m/s and 104 K respectively. Hence, these processes cover different velocity-temperature regimes for deposition of different types of coatings. While these processes are most commonly used in industry, another technique involves the use of detonation waves (i.e. supersonic premixed flames) for deposition of high density coatings [3–7]. The advantage of using detonation waves to deposit coatings stems from the fact that very high (supersonic) speeds can be sustained and thus this process provides the means to accelerate particles to very high velocities and produce dense coatings. However, the main disadvantage of this process is its discontinuous, repetitive nature. The detonation deposition process had originally been developed as a proprietary technology. Recently, a number of publications have appeared in this field such as references [6,7]. While the detonation process may have its practical limitations, it has the distinct advantage of enabling detailed, systematic study of particle deposition process since it subjects the particles to a well-characterized one dimensional flow field. Plasma and HVOF systems provide a turbulent flow field in which the injected powder particles are accelerated and heated up before impact. Description of particle properties and the control of the particle states (velocity and temperature) in a turbulent flow field are difficult at best. Experimentally, the measurements of particle temperatures and velocities are presented in a statistical form as probability density distributions of particle properties [10]. Computationally, particle properties are computed in a turbulent flow simulation by Lagrangian tracking of particles and developing statistics of particle properties [9] much like those determined experimentally. Because of the dispersion of particle states in a turbulent flow, a systematic study of coating properties as a function of particle processing conditions becomes difficult. In contrast, one dimensional uniform flow behind a detonation wave front subjects the particles to the same flow conditions, thus allowing examination of the deposition process as a function of particle parameters. Furthermore, flow and particle parameters can be computed in a relatively straightforward manner. Earlier work on detonation deposition of coatings have concentrated primarily on comparisons of this process with plasma processing in terms of the coating properties (hardness and wear resistance) and microstructure [3–6]. For example, Kharlamov has studied the relationship between adhesion strength of coatings and the parameters of detonation spraying and compared them with those for plasma spraying [4]. Saravanan et al [7] had performed a full Taguchi design of experiments to investigate the effects of detonation process parameters for alumina coatings. A similar study was conducted by Sundararajan et al [6] for tungsten carbide-cobalt, alumina and nickelchromium coatings. Their study concentrated on the tribological behavior of these coatings under different wear modes and compared both plasma and detonation generated coatings. Semenov and cetegen have recently discussed the deposition of nano-structured coatings by the detonation process [7]. One of the main objectives of this presentation is to use the detonation process to determine if highly nano-structured coatings can be generated with the detonation process that provides higher velocitylower temperature processing conditions compared to the plasma process. Secondly, a more basic understanding of the deposition process is sought using the detonation deposition without the turbulent, dispersive nature of the plasma and HVOF processes. In the following, we first describe the experimental systems used in this study and the features of both nano-structured and conventional alumina-titania coatings created by the detonation process. The effects of high particle kinetic energies, partition of the particle energies between thermal and kinetic and their influence on the deposition process also evaluated.
3

Torres, Ricardo, Paulo Soares, Andressa Almeida, and Steffen Aichholz. "Tribological Properties of Boronized AISI 4140 Steel." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0939.

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Jones, Morgan, Andrew Kustas, Michael Chandross, Ping Lu, and Nicolas Argibay. "Tribological and Mechanical Properties of High Entropy Alloys." In Proposed for presentation at the Society of Tribologists and Lubrication Engineers. US DOE, 2021. http://dx.doi.org/10.2172/1860310.

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5

Stadiniski Hartmann, João Henrique, Carlos Marcus Cruz, Carlos Henrique Silva, and Valquiria borges. "TRIBOLOGICAL PROPERTIES OF UNSATURATED POLYESTER REINFORCED WITH GRAPHITE." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-2823.

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6

Pustan, M., C. Birleanu, C. Dudescu, and O. Belcin. "Temperature effect on tribological and mechanical properties of MEMS." In 2013 14th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems (EuroSimE). IEEE, 2013. http://dx.doi.org/10.1109/eurosime.2013.6529890.

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7

Panin, S. V., D. A. Nguyen, L. A. Kornienko, D. G. Buslovich, and M. I. Lerner. "Mechanical and tribological properties of thermoplastic polyetheretherketone based nanocomposites." In INTERNATIONAL CONFERENCE ON SCIENCE AND APPLIED SCIENCE (ICSAS2020). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0026664.

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Buchanan, Vernon, and Marva Blankson. "Tribological, Mechanical and Physical Properties of Concrete with Rubber Particles." In The 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation, and Infrastructure for Sustainable Cities and Communities”. Latin American and Caribbean Consortium of Engineering Institutions, 2019. http://dx.doi.org/10.18687/laccei2019.1.1.496.

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9

Saad, Najim Abdul Ameer, and Hadeel Basim Mohammed Ridha. "Investigation of tribological and mechanical properties of PEEK-TiO2 composites." In 2017 8th International Conference on Mechanical and Aerospace Engineering (ICMAE). IEEE, 2017. http://dx.doi.org/10.1109/icmae.2017.8038666.

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10

Hu, Jianqiang, Zhanhe Du, and Junbing Yao. "Study on Tribological Properties of Cadmium Dialkyl-Dithiophosphyl-ldithiophosphate Additive." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79888.

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An cadmium dialkyl-dithiophosphyl-dithiophosphate additive was synthesized. A four-ball tester was used to evaluate the tribological performance of the additive in mineral base oil under different loads, compared with commercial additives. The results show that it exhibits excellent antiwear and load-carrying capacities and better than these additives. The surface analytical tools such as Auger Electron Spectrometer (AES), Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray (EDX) were used to investigate the topography, the contents and the depth profile of some typical elements on the rubbing surface of worn scar. Smooth and light topography of worn scar further confirms that the additive showed good antiwear capacities, the results of Auger electron spectrometer and energy dispersive X-ray analysis indicate that tribochemically protective films consists of cadmium compouds, sulfides, sulphates and phosphates were formed on the rubbing surface, which contribute to improving the tribological properties of lubricants. Particularly, the results from depth profile indicate that a large amounts of cadmium are rich in outer layer of surface, which play an important role in improving antiwear properties of oils. Finally, the antiwear mechanism of the additive were proposed.

Reports on the topic "Mechanical et Tribological properties":

1

Kodali, Padma. Mechanical and tribological properties of ion beam-processed surfaces. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/569103.

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