The Experts below are selected from a list of 3021 Experts worldwide ranked by ideXlab platform
Mehmet Z. Baykara - One of the best experts on this subject based on the ideXlab platform.
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The Potential of Ti3C2TX Nano-sheets (MXenes) for Nanoscale Solid Lubrication Revealed by Friction Force Microscopy
Applied Surface Science, 2021Co-Authors: A. Rodriguez, M.s. Jaman, Ogulcan Acikgoz, Wang Bidou, P.g. Grutzmacher, Andreas Rosenkranz, Mehmet Z. BaykaraAbstract:Abstract Ti3C2TX nano-sheets (MXenes) are an emerging class of two-dimensional materials with outstanding potential to be employed in energy storage, catalysis, and triboelectric applications, on length scales ranging from the nano- to macroscopic. Despite rapidly accelerating interest in this new class of materials, their nanoscale frictional properties and in particular, their potential for Solid Lubrication on the nanoscale, have not been explored in detail yet. In this short communication, we present the first results on the nanoscale frictional characteristics of MXenes, in the form of a friction map obtained on an isolated Ti3C2Tx nano-sheet deposited on a silicon dioxide substrate via friction force microscopy. Our experiments reveal that few-layer Ti3C2Tx nano-sheets indeed act as Solid lubricants on the nanoscale, reducing friction on the silicon dioxide substrates, although not as effectively as few-layer graphene. The results reported here pave the way for further studies focusing on nanoscale Solid Lubrication achieved by Ti3C2TX (MXene) nano-sheets.
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The Potential of Ti$_3$C$_2$T$_X$ Nano-sheets (MXenes) for Nanoscale Solid Lubrication Revealed by Friction Force Microscopy
arXiv: Applied Physics, 2020Co-Authors: A. Rodriguez, M.s. Jaman, Ogulcan Acikgoz, Wang Bidou, P.g. Grutzmacher, Andreas Rosenkranz, Mehmet Z. BaykaraAbstract:Ti$_3$C$_2$T$_X$ nano-sheets (MXenes) are an emerging class of two-dimensional materials with outstanding potential to be employed in energy storage, catalysis, and triboelectric applications, on length scales ranging from the nano- to macroscopic. Despite rapidly accelerating interest in this new class of materials, their nanoscale frictional properties and in particular, their potential for Solid Lubrication on the nanoscale, have not been explored in detail yet. In this short communication, we present the first results on the nanoscale frictional characteristics of MXenes, in the form of a friction map obtained on an isolated Ti$_3$C$_2$T$_x$ nano-sheet deposited on a silicon dioxide substrate via friction force microscopy. Our experiments reveal that few-layer Ti$_3$C$_2$T$_x$ nano-sheets indeed act as Solid lubricants on the nanoscale, reducing friction on the silicon dioxide substrates, although not as effectively as few-layer graphene. The results reported here pave the way for further studies focusing on nanoscale Solid Lubrication achieved by Ti$_3$C$_2$T$_X$ (MXene) nano-sheets.
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Solid Lubrication with MoS2: A Review
Lubricants, 2019Co-Authors: Mohammad R. Vazirisereshk, Ashlie Martini, David A. Strubbe, Mehmet Z. BaykaraAbstract:Molybdenum disulfide (MoS2) is one of the most broadly utilized Solid lubricants with a wide range of applications, including but not limited to those in the aerospace/space industry. Here we present a focused review of Solid Lubrication with MoS2 by highlighting its structure, synthesis, applications and the fundamental mechanisms underlying its lubricative properties, together with a discussion of their environmental and temperature dependence. The review also includes an extensive overview of the structure and tribological properties of doped MoS2, followed by a discussion of potential future research directions.
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Solid Lubrication with MoS$_2$: A Review
arXiv: Materials Science, 2019Co-Authors: Mohammad R. Vazirisereshk, Ashlie Martini, David A. Strubbe, Mehmet Z. BaykaraAbstract:Molybdenum disulfide (MoS$_2$) is one of the most broadly utilized Solid lubricants with a wide range of applications, including but not limited to those in the aerospace/space industry. Here we present a focused review of Solid Lubrication with MoS$_2$ by highlighting its structure, synthesis, applications and the fundamental mechanisms underlying its lubricative properties, together with a discussion of their environmental and temperature dependence. An effort is made to cover the main theoretical and experimental studies that constitute milestones in our scientific understanding. The review also includes an extensive overview of the structure and tribological properties of doped MoS$_2$, followed by a discussion of potential future research directions.
Hai-dou Wang - One of the best experts on this subject based on the ideXlab platform.
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FeS Solid Lubrication Layer Prepared by Other Methods
Micro and Nano Sulfide Solid Lubrication, 2012Co-Authors: Hai-dou Wang, Jiajun LiuAbstract:The FeS Solid Lubrication layer prepared by low temperature ion sulfuration technique has been described in Chapters 2 and 3. Although its tribological properties are excellent, the applications are subject to a certain limitation due to the disadvantages of ion sulfuration technology. The costs of ion sulfuration are relatively high; meanwhile, the process must be completed in the vacuum chamber of a certain size, in other words, it can only deal with some smaller and easily transported parts, such as cylinder piston rings, nozzles, pistons, and roller bearings, etc. In order to extend the application of Solid Lubrication layer, it is very necessary to develop new processes for preparing low-cost FeS layers. In this chapter, other methods for preparing FeS coatings will be introduced.
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Solid Lubrication Materials
Micro and Nano Sulfide Solid Lubrication, 2012Co-Authors: Hai-dou Wang, Jiajun LiuAbstract:Solid Lubrication is an important component of Lubrication. It overcomes some inherent drawbacks for liquid Lubrication. Solid Lubrication can be adopted in very harsh conditions such as high temperature, heavy load, ultralow temperature, ultrahigh vacuum, strong oxidation, and intense radiation, etc. In above conditions, liquid Lubrication will lose its lubricating function. Solid Lubrication materials are divided into four categories, i.e., soft metals, metal compounds, inorganic and organic materials. They have different lubricating mechanisms and can be applied to different situations.
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Micron-nano ZnS Solid Lubrication Film
Micro and Nano Sulfide Solid Lubrication, 2012Co-Authors: Hai-dou Wang, Jiajun LiuAbstract:The researches on the MoS2 film as the representative of Solid Lubrication has been paid great attention. Until now, a large number of methods have been developed to prepare MoS2 films, such as RF sputtering, pulsed DC sputtering, magnetron sputtering, reactive sputtering, ion-beam assisted deposition, pulsed laser deposition, chemical vapor deposition, electrochemical deposition, and electro-deposition. In addition to the deposition films, MoS2 bonding films are also applied extensively.
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characterization and tribological properties of plasma sprayed fes Solid Lubrication coatings
Materials Characterization, 2005Co-Authors: Hai-dou Wang, Jiajun Liu, Daming ZhuangAbstract:Plasma sprayed technology has been utilized to prepare Solid Lubrication FeS coatings with thicknesses of 0.3 mm, 0.8 mm and 1.5 mm. Their tribological properties were comparatively investigated under oil Lubrication. An SEM equipped with EDS, and XRD were employed to analyze the surface and worn scar morphologies of the coatings, as well as the surface phase structures. A scratch testing machine was utilized to measure the bond strength between substrate and coating. The results showed that the tribological properties of the sprayed FeS coatings were superior to the original 1045 steel. The 0.8 mm thick coating possessed the best tribological properties. The differences in tribological properties of the three coatings were determined by the differences of their thickness and structure.
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Microstructures and friction-reduction performances of the graphite coatings
Materials Letters, 2005Co-Authors: Hai-dou Wang, Daming Zhuang, Xian-cheng Zhang, Bin-shi Xu, Yi JiangAbstract:Abstract A sol–gel method was employed to prepare the graphite Solid Lubrication coating on the 1045 steel with 0.35 mm thick. SEM equipped with EDS was utilized to observe and analyze the coating morphologies and energy spectrum of the surface and worn scars. XRD was used to detect the phase structure of the coating. The friction-reduction performances of the coatings were tested on a friction tester. The results show that the coatings are well bonded with substrate and possessed excellent friction-reduction ones.
A. Rodriguez - One of the best experts on this subject based on the ideXlab platform.
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The Potential of Ti3C2TX Nano-sheets (MXenes) for Nanoscale Solid Lubrication Revealed by Friction Force Microscopy
Applied Surface Science, 2021Co-Authors: A. Rodriguez, M.s. Jaman, Ogulcan Acikgoz, Wang Bidou, P.g. Grutzmacher, Andreas Rosenkranz, Mehmet Z. BaykaraAbstract:Abstract Ti3C2TX nano-sheets (MXenes) are an emerging class of two-dimensional materials with outstanding potential to be employed in energy storage, catalysis, and triboelectric applications, on length scales ranging from the nano- to macroscopic. Despite rapidly accelerating interest in this new class of materials, their nanoscale frictional properties and in particular, their potential for Solid Lubrication on the nanoscale, have not been explored in detail yet. In this short communication, we present the first results on the nanoscale frictional characteristics of MXenes, in the form of a friction map obtained on an isolated Ti3C2Tx nano-sheet deposited on a silicon dioxide substrate via friction force microscopy. Our experiments reveal that few-layer Ti3C2Tx nano-sheets indeed act as Solid lubricants on the nanoscale, reducing friction on the silicon dioxide substrates, although not as effectively as few-layer graphene. The results reported here pave the way for further studies focusing on nanoscale Solid Lubrication achieved by Ti3C2TX (MXene) nano-sheets.
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The Potential of Ti$_3$C$_2$T$_X$ Nano-sheets (MXenes) for Nanoscale Solid Lubrication Revealed by Friction Force Microscopy
arXiv: Applied Physics, 2020Co-Authors: A. Rodriguez, M.s. Jaman, Ogulcan Acikgoz, Wang Bidou, P.g. Grutzmacher, Andreas Rosenkranz, Mehmet Z. BaykaraAbstract:Ti$_3$C$_2$T$_X$ nano-sheets (MXenes) are an emerging class of two-dimensional materials with outstanding potential to be employed in energy storage, catalysis, and triboelectric applications, on length scales ranging from the nano- to macroscopic. Despite rapidly accelerating interest in this new class of materials, their nanoscale frictional properties and in particular, their potential for Solid Lubrication on the nanoscale, have not been explored in detail yet. In this short communication, we present the first results on the nanoscale frictional characteristics of MXenes, in the form of a friction map obtained on an isolated Ti$_3$C$_2$T$_x$ nano-sheet deposited on a silicon dioxide substrate via friction force microscopy. Our experiments reveal that few-layer Ti$_3$C$_2$T$_x$ nano-sheets indeed act as Solid lubricants on the nanoscale, reducing friction on the silicon dioxide substrates, although not as effectively as few-layer graphene. The results reported here pave the way for further studies focusing on nanoscale Solid Lubrication achieved by Ti$_3$C$_2$T$_X$ (MXene) nano-sheets.
Jiajun Liu - One of the best experts on this subject based on the ideXlab platform.
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Solid Lubrication Materials
Micro and Nano Sulfide Solid Lubrication, 2012Co-Authors: Hai-dou Wang, Jiajun LiuAbstract:Solid Lubrication is an important component of Lubrication. It overcomes some inherent drawbacks for liquid Lubrication. Solid Lubrication can be adopted in very harsh conditions such as high temperature, heavy load, ultralow temperature, ultrahigh vacuum, strong oxidation, and intense radiation, etc. In above conditions, liquid Lubrication will lose its lubricating function. Solid Lubrication materials are divided into four categories, i.e., soft metals, metal compounds, inorganic and organic materials. They have different lubricating mechanisms and can be applied to different situations.
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FeS Solid Lubrication Layer Prepared by Other Methods
Micro and Nano Sulfide Solid Lubrication, 2012Co-Authors: Hai-dou Wang, Jiajun LiuAbstract:The FeS Solid Lubrication layer prepared by low temperature ion sulfuration technique has been described in Chapters 2 and 3. Although its tribological properties are excellent, the applications are subject to a certain limitation due to the disadvantages of ion sulfuration technology. The costs of ion sulfuration are relatively high; meanwhile, the process must be completed in the vacuum chamber of a certain size, in other words, it can only deal with some smaller and easily transported parts, such as cylinder piston rings, nozzles, pistons, and roller bearings, etc. In order to extend the application of Solid Lubrication layer, it is very necessary to develop new processes for preparing low-cost FeS layers. In this chapter, other methods for preparing FeS coatings will be introduced.
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Micron-nano ZnS Solid Lubrication Film
Micro and Nano Sulfide Solid Lubrication, 2012Co-Authors: Hai-dou Wang, Jiajun LiuAbstract:The researches on the MoS2 film as the representative of Solid Lubrication has been paid great attention. Until now, a large number of methods have been developed to prepare MoS2 films, such as RF sputtering, pulsed DC sputtering, magnetron sputtering, reactive sputtering, ion-beam assisted deposition, pulsed laser deposition, chemical vapor deposition, electrochemical deposition, and electro-deposition. In addition to the deposition films, MoS2 bonding films are also applied extensively.
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characterization and tribological properties of plasma sprayed fes Solid Lubrication coatings
Materials Characterization, 2005Co-Authors: Hai-dou Wang, Jiajun Liu, Daming ZhuangAbstract:Plasma sprayed technology has been utilized to prepare Solid Lubrication FeS coatings with thicknesses of 0.3 mm, 0.8 mm and 1.5 mm. Their tribological properties were comparatively investigated under oil Lubrication. An SEM equipped with EDS, and XRD were employed to analyze the surface and worn scar morphologies of the coatings, as well as the surface phase structures. A scratch testing machine was utilized to measure the bond strength between substrate and coating. The results showed that the tribological properties of the sprayed FeS coatings were superior to the original 1045 steel. The 0.8 mm thick coating possessed the best tribological properties. The differences in tribological properties of the three coatings were determined by the differences of their thickness and structure.
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Study on Solid Lubrication Property of Mos2-Containing Ni Base and Ni-P Base Composite Brush Plating Layers
Tribology Series, 1993Co-Authors: Xian-hua Zhang, Jiajun Liu, Bao–liang ZhuAbstract:Abstract Using brush plating technique 1 to realize Solid Lubrication is one of new methods of Solid Lubrication with great vitality. The newly developed Ni/MoS 2 and Ni-P/ MoS 2 composite brush plating layers have been widely applied on numerous machine parts with success. In order to evaluate their Solid Lubrication property and approach the mechanism of thier effect this paper conducted systematic investigations and comparisons of their tribological behaviors on a “ball-on-disc” testing machine under Lubrication, and discussed their mechanism through microscopic anlayses of TEM, SEM, and X-ray diffraction. The results of research showed that the friction coefficient of both composite brush plating layers can reach generally 0.05~0.06, and the wear-resistance of Ni-P/MoS 2 is 4~ 6 times that of Ni/MoS 2 .
Liping Wang - One of the best experts on this subject based on the ideXlab platform.
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functional regulation of pb ti mos2 composite coatings for environmentally adaptive Solid Lubrication
Applied Surface Science, 2017Co-Authors: Siming Ren, Mingjun Cui, Liping WangAbstract:The Lubrication of molybdenum disulfide coatings has commonly been limited by the application environments, for instance, the crystal MoS2 are easily affected by water to form MoO3 that causes a higher friction coefficient and short lifetime. Therefore, to improve the tribolgical performance of MoS2 in high humidity condition, the co-doped Pb-Ti/MoS2 composite coatings are deposited by unbalanced magnetron sputtering system. The design of the co-doping elements in MoS2-based coatings can not only maintain the characteristic of low humidity-sensitivity as the Ti/MoS2 coating but also improve the mechanical properties and tribological performance of coatings as a comparison with single-doped ones. Moreover, the ultra-low friction coefficient with a minimum value of 0.006 under the vacuum condition is achieved for Pb-Ti/MoS2 composite coating containing about 4.6 at.% Pb, depending on the densification structure of coating. Intriguingly, the wear behaviours of Pb-Ti/MoS2 composite coatings are in accordance with the variation in H/E (hardness to the elastic modulus) ratio that the coating with higher H/E exhibits lower wear rate. These results demonstrate that the lubricating properties of MoS2 coatings in both humid environment and vacuum condition can be achieved through the Pb and Ti co-doped, which is of great significant for developing MoS2 coatings as the environmentally adaptive lubricants.
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TiC/a-C:H nanocomposite coatings as substitute for MoS2-based Solid Lubrication in helium atmosphere
Journal of Non-Crystalline Solids, 2012Co-Authors: Liping Wang, Guangan Zhang, Yongxin Wang, Yunfeng Wang, Xiaojun Sun, Qunji XueAbstract:Abstract The existing challenges due to the extremely wear condition and variable serving environments require urgent improvements in the performance of Solid Lubrication coatings in helium atmosphere applications. In this paper, TiC/a-C:H and Ti–MoS2 coatings were deposited using magnetron sputtering process. The tribological performance of TiC/a-C:H and MoS2-based coatings were comparatively investigated under helium gas atmospheres. Results show that TiC/a-C:H coatings exhibit a super-low friction coefficient of around 0.02, and the wear rate of the TiC/a-C:H coatings was nearly one order of magnitude lower than Ti-MoS2 coatings. While the Ti–MoS2 coatings were characterized by severe adhesion wear and plastic deformation. The significant improvement in the tribological performance of TiC/a-C:H coatings can be attributed to the higher hardness and the large extent coverage of transferred carbon films on counterfaces. The good balance between hardness and toughness, super-low friction and excellent anti-wear properties of TiC/a-C:H coatings make them good substitution as Solid lubricating coating for helium applications.
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tic a c h nanocomposite coatings as substitute for mos2 based Solid Lubrication in helium atmosphere
Journal of Non-crystalline Solids, 2012Co-Authors: Liping Wang, Guangan Zhang, Yongxin Wang, Yunfeng Wang, Xiaojun Sun, Qunji XueAbstract:Abstract The existing challenges due to the extremely wear condition and variable serving environments require urgent improvements in the performance of Solid Lubrication coatings in helium atmosphere applications. In this paper, TiC/a-C:H and Ti–MoS2 coatings were deposited using magnetron sputtering process. The tribological performance of TiC/a-C:H and MoS2-based coatings were comparatively investigated under helium gas atmospheres. Results show that TiC/a-C:H coatings exhibit a super-low friction coefficient of around 0.02, and the wear rate of the TiC/a-C:H coatings was nearly one order of magnitude lower than Ti-MoS2 coatings. While the Ti–MoS2 coatings were characterized by severe adhesion wear and plastic deformation. The significant improvement in the tribological performance of TiC/a-C:H coatings can be attributed to the higher hardness and the large extent coverage of transferred carbon films on counterfaces. The good balance between hardness and toughness, super-low friction and excellent anti-wear properties of TiC/a-C:H coatings make them good substitution as Solid lubricating coating for helium applications.