钛合金基类金刚石梯度薄膜的生物摩擦学性能评价

通过与钛合金／超高分子量聚乙烯摩擦副的对比，研究了DLC／UHMWPE摩擦副分别在干摩擦、生理盐水^L和Hank's溶液润滑下的摩擦磨损特性。用二次离子质谱和声波反射划痕仪分别测定了DLC梯度薄膜的组分分布和附着强度，并用扫描电子显微镜观察试样表面形貌，探讨其磨损机理。结果表明：用PSII-IBED法制备的DLC薄膜的组分由内向外呈梯度变化，膜的附着强度较高。DLC梯度薄膜是一种减摩耐磨材料，其摩擦系数随载荷的增大而减小。     

超高分子量聚乙烯/金属复合材料的摩擦磨损性能

用MM-200型摩擦磨损试验机研究了Ag、Cu、Co、Cr、Fe、Mo、W、Ni、Zn、Pb、Sn、Al等金属粉末填充超高分子量聚乙烯(UHMWPE)复合材料的摩擦磨损性能,利用扫描电子显微镜观察了复合材料磨损表面形貌.结果表明:在低速条件下,金属填料可降低UHMWPE复合材料的摩擦系数;在高速条件下,金属填料对UHMWPE复合材料的摩擦系数影响不尽相同.Ag、Cu、Co、Cr、Fe、Mo、W、Ni、Zn、Pb等金属填料可使UHMWPE的耐磨性显著提高, 而Sn、Al导致UHMWPE的磨损率增大;Ag的减摩抗磨效果最佳.     

低缠结超高分子量聚乙烯制备技术及应用EI北大核心CSCD

超高分子量聚乙烯(UHMWPE)具有优异的使用性能,但是现有的商品化UHMWPE加工异常困难,严重限制了UHMWPE的大规模应用。低缠结UHMWPE相对于现有的商品化UHMWPE,分子链间的缠结更少,可加工性更好,为UHMWPE的生产、加工、应用开辟了一条全新的道路。文中综述了使用均相和非均相UHMWPE催化剂,制备低缠结UHMWPE的最新进展,并对低缠结UHMWPE在固态拉伸、烧结/挤压成型等方面的研究进展和应用前景进行了分析。     

低缠结超高分子量聚乙烯制备技术及应用EI

超高分子量聚乙烯(UHMWPE)具有优异的使用性能,但是现有的商品化UHMWPE加工异常困难,严重限制了UHMWPE的大规模应用。低缠结UHMWPE相对于现有的商品化UHMWPE,分子链间的缠结更少,可加工性更好,为UHMWPE的生产、加工、应用开辟了一条全新的道路。文中综述了使用均相和非均相UHMWPE催化剂,制备低缠结UHMWPE的最新进展,并对低缠结UHMWPE在固态拉伸、烧结/挤压成型等方面的研究进展和应用前景进行了分析。     

复合电沉积技术制备颗粒增强耐磨复合材料及其在汽车轴瓦中的应用 …

综述了复合沉积技术用于制行颗粒增强耐磨材料的研究发展概况,复合电沉积机理及用复合电沉积法制备ＰＭＭＣ的特点,介绍了复合电沉积在制备耐磨材料特别是铜基耐磨材料方面的发展应用,对铜基颗粒增强复合镀层在汽车轴瓦中的应用作了展望。     

一种可用子粗糙表面的新型耐磨材料

超高分子量聚乙烯(UHMWPE)是一性能优良的耐磨材料。实验发现在对磨面粗糙情况下它也具极好的抗磨性能,因而很适用于铁路领域。但 UHMWPE 耐热性较差,因此通过适当的物理化学方法对其进行了改性得到了一种耐磨耐热性大为改善的新材料。和现有几种常用耐磨塑料的耐磨对比试验,证明其耐磨性远优于目前使用的耐磨塑料,而且也能满足使用温度要求。     

UHMWPE共混改性聚烯烃的研究进展

主要介绍了国内外利用少组分的超高分子量聚乙烯(UHMWPE)对普通聚烯烃HDPE、LDPE和PP的共混改性,指出少组分的UHMWPE共混改性聚烯烃,既可以有效解决UHMWPE加工难的问题,又可以在某些方面提高聚烯烃的性能,指出了UHMWPE应用新的方向.     

一种新型耐磨材料——高熵合金

介绍了几种新型钢铁耐磨材料的研究现状,以及粉末冶金和表面处理技术在耐磨材料研究中的应用,重点介绍了近几年来出现的高熵合金耐磨材料.提出基于高熵设计理念,结合新型表面处理或粉末冶金技术,研究开发新型耐磨材料的思路.     

Ti6Al4V表面离子束辅助沉积DLC薄膜及其摩擦学性能研究

利用离子束辅助沉积(IBAD)的方法来制备含氢DLC薄膜,在球-盘微摩擦试验仪上对DLC薄膜及Ti6Al4V分别与超高分子量聚乙烯(UHMWPE)组成的摩擦副的摩擦学性能进行了研究.结果表明:在Ti6Al4V球表面用离子束辅助沉积技术可以沉积DLC薄膜,所制备的DLC薄膜能有效地减小摩擦系数,改善摩擦学性能,在干摩擦下DLC薄膜表现出一定的减摩作用,在生理盐水润滑的条件下,DLC薄膜具有优异的减摩作用.     

复合电沉积技术制备颗粒增强耐磨复合材料及其在汽车轴瓦中的应用展望

综述了复合电沉积技术用于制备颗粒增强耐磨材料的研完发展概况,复合电沉积机理及用复合电沉积法制备PMMC的特点.介绍了复合电沉积在制备耐磨材料特别是铜基耐磨材料方面的发展应用,对铜基颗粒增强复合镀层在汽车轴瓦牛的应用作了展望.     

纳米铜颗粒作为润滑油添加剂的研究进展

综述了纳米铜颗粒作为润滑油添加剂的分散稳定性、摩擦学作用机理及自修复性能的研究进展,阐述了粒径、添加量、摩擦条件、润滑介质及材料特性等因素对其摩擦学性能的影响,指出了当前研究中存在的主要问题,并对今后的研究提出了几点建议.     

海洋环境下关键摩擦副材料的摩擦学研究现状与展望

海洋是人类生存的基本空间,也是保证人类社会持续发展的宝库。关于海洋环境下材料的摩擦学研究,不仅促进了海洋工程装备的开发,而且也为海洋工程装备的关键摩擦副材料提供了有力支撑。但海洋环境下的摩擦磨损严重制约了海洋专用材料的应用与发展,主要原因是海水介质复杂,以及腐蚀与摩擦的交互作用等。因此,研究和探讨海洋环境下关键摩擦副材料的摩擦学是提高我国海洋工程装备整体水平的重要途径。对海洋环境下关键摩擦副材料的摩擦学研究进行汇总与分析,着重介绍了金属与金属配副、陶瓷与金属配副、聚合物与金属配副、聚合物与陶瓷配副等在海水环境下的摩擦学研究现状,并结合摩擦副材料的摩擦学研究现状及发展趋势,对海洋环境下关键摩擦副材料的摩擦学研究进行了展望。     

Mechanotribological Aspects of MXene-Reinforced Nanocomposites

MXenes are recently discovered 2D nanomaterial with superior mechanical, thermal, and tribological properties, being commonly employed in a wide variety of critical research areas, ranging from cancer therapy to energy and environmental applications. Due to their special properties, such as mechanoceramic nature with excellent mechanical performance, thermal stability and rich surface properties, MXenes have tremendous potential as advanced composite structures, especially those based on polymers due to a great affinity between macromolecules and the terminating groups of 2D MXenes. MXenes have been extensively explored in metal matrix nanocomposites as well as in solid- or liquid-based lubrication systems owing to the 2D structure and antifriction characteristics. The purpose of the this paper is to provide a comprehensive insight into the material, mechanical, and tribological properties of the MXene nanolayers with discussions on the recent advancements attained from MXene-reinforced nanocomposites starting with the synthesis, fabrication techniques, intricacies of the underlying physics and mechanisms, and finally focusing on the progress in computational studies. This analysis of MXene-based composites will stimulate an emerging field with innumerable opportunities and ample potentials to produce newfangled materials and structures with targeted properties.     

Electrochemical behaviour of molybdenum coated with flame CVD polycrystalline diamond film

Although natural diamond is a complete chemically-inert material for a wide range of aggressive environments, its comparative scarcity and problems for coating design have hampered its utility as a corrosion protective coating. The recent discovery and development of chemical vapour deposition methods for growing diamond crystals and polycrystalline diamond films has opened up a wide range of applications thanks to their excellent tribological, electronic and optical properties. Various applications are in progress for corrosion and combined wear and corrosion protection. This paper presents the first study of the corrosion behaviour of continuous polycrystalline diamond films using electrochemical impedance electroscopy. Diamond films have been deposited on molybdenum substrates by means of the acetylene flame combustion method (FCVD). Electrochemical behaviour has been studied in a 0.6 M NaCl solution, it being seen that despite the inert character and apparent continuity of the film, there are areas of the base material which are exposed to the electrolyte. This behaviour has been modelled by means of an equivalent circuit which allows for the corroboration of the proposed mechanism.     

应用于摩擦学领域的涂层研究现状与展望

利用涂层改善工件的摩擦学特性已经得到日益广泛的重视.分析了应用于摩擦学领域涂层的现状,介绍了涂层在摩擦和磨损中的损伤、涂层的摩擦学设计、结构设计等情况,就涂层在摩擦学领域中的应用进行了论述.     

Tribological Performance of Bioimplants: A Comprehensive Review

Total joint replacements(TJR) have been a huge success for orthopaedic surgery in the past century and are gaining increasing importance today due to the aging population. However, the short longevity of artificial joints is one of the major problems in bioimplant industry and needs to be rectified since an increasing number of young people, with more active lifestyles, must receive TJR. Wear mechanisms are discussed in this paper to describe the root causes of the failures and to give some general ideas to increase the lifespan of artificial joints. The suitable material combination is of great importance for the wear resistance of bioimplants, and bioceramics will exert a crucial effect in their future progress. Other materials, such as metal alloys and polymers, are also discussed in this paper. Surface finish is another factor affecting the tribological performance of bioimplants. In recent years, surface texture technology has fascinated many researchers, and a good design of texture pattern requires a comprehensive understanding of wear mechanisms, material properties, and dynamic fluid theory. This review also covers a summary of in vitro wear tests, including simulators, lubricant, and testing parameters.     

Einfluss der Mikrostruktur auf das Verschleiß‐ verhalten der hartanodisierten Aluminium‐legierungen EN AW‐6082 und EN AW‐7075

Microstructural effect on the wear behaviour of the hard‐anodised aluminium alloys EN AW‐6082 and EN AW‐7075 The suitability of hard‐anodising of high‐strength Al alloys (EN AW‐7075‐T651) for the fabrication of protective coatings which are also applicable on screws was investigated. A medium‐strength AlSi1MgMn alloy (AA60682‐T6), generally rated as applicable for anodising, was used as reference material. After possible setting phenomena of a screw joint, the load‐bearing surface of the screw can be subjected to an oscillating relative movement. The damaging tribological load was simulated in an oscillation wear test. The resulting wear appearances have revealed that the untreated oxide coatings on the EN AW‐6082 substrate are not capable of providing protection against tribological load. Since hot‐water sealing increases the hardness of the coating but also contains the technology‐induced risk of softening the substrate material, other tribological protection methods have been looked for. The analysis of the tribological tests (characterisation of the structure and the resulting properties of the material, measurement of the wear amount and analysis of the wear appearance) have shown that the films sealed with wax emulsion on both substrate materials are the most promising candidates for the application of devices under oscillation wear. The obtained roughness, friction coefficients and hardness values confirm the positive behaviour of the anodically oxidised EN AW‐7075‐T651 alloy under the chosen tribological load.     

列车制动摩擦材料研究进展

简单概述了各类列车制动摩擦材料的发展历史及现状;阐述了它们各自的性能和特点,并据此分析了它们的适用条件与范围。介绍了高速列车制动元件及其材质优化组合与工艺技术的发展趋势     

Nanometer‐Thick Ionic Liquids as Boundary Lubricants

Ionic liquids (ILs) are fascinating materials with unique combination of solid and liquid properties. Due to high thermal stability and promising tribological properties, there have been increasing research interests in applying ILs as boundary lubricants. In this review, the authors will discuss the recent progress on this topic with the emphasis on the relationship between the molecular arrangement of ILs confined to a solid and the tribological properties. First, the fundamentals on boundary lubrication and the state‐of‐the‐art lubricants will be reviewed briefly. Second, the progress on the molecular structure of ILs confined to a solid surface will be discussed. Afterward, the experimental and computational efforts on the ILs as boundary lubricants will be discussed in details with emphasis on the effect of IL structure, solid substrates, and IL‐soild interaction. Finally, the future research directions will be discussed.

     

碳/碳复合材料摩擦学性能及摩擦机制研究进展

碳/碳复合材料是一种性能优异的高温摩擦材料,作为刹车材料在航空工业已得到成功应用.但碳/碳复合材料的摩擦磨损性能强烈地依赖于试验条件和制备工艺.综述了各种因素对碳/碳复合材料摩擦磨损性能的影响,总结了碳/碳复合材料摩擦磨损机理,并指出了碳/碳复合材料摩擦学需进一步深入研究的问题及新的研究方向.