Yaqing Xue, Hong Yu, Hongwei Liang, Xiaomei Wang, Conghui Meng, Shiyao Lei, Haochen Wang, Long Wang, Cheng-Feng Du
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引用次数: 0
摘要
MAX相陶瓷是高温条件下最有前途的固体润滑剂之一。在此基础上，基于高熵（HE）类似物合成了两个具有可调节过渡金属成分的新季max （Cr1Ti0.75Mo0.75V0.5AlC2和Cr1.25Ti0.75Mo0.75V0.25AlC2）。系统研究了Cr- ti- mo -V max在800℃的空气中对Si3N4摩擦偶的摩擦学性能，并阐明了Cr和V含量对Cr- ti- mo -V max的润滑和抗磨性能的影响。在800℃的极端工作温度下，Cr1.25Ti0.75Mo0.75V0.25AlC2表现出优异的自润滑性能，平均COF为0.20，平均磨损率低至3.6 × 10−7 mm3 N−1 m−1。
Optimizing the Cr and V content in quaternary MAX phase for high-temperature lubricity and wear resistance
The MAX phase ceramics are one of the most promising solid lubricants for high-temperature (HT) conditions. Herein, two new quaternary MAXs with regulatable transition-metal constituents (Cr1Ti0.75Mo0.75V0.5AlC2 and Cr1.25Ti0.75Mo0.75V0.25AlC2) are synthesized based on an high-entropy (HE) analogue. Their tribological properties against the Si3N4 tribocouple in a wide temperature up to 800 ºC in the air are systematically studied, the impacts of the Cr and V contents on lubricity and anti-wear performance of the Cr-Ti-Mo-V MAXs are illuminated as well. At an extreme operating temperature of 800 °C, Cr1.25Ti0.75Mo0.75V0.25AlC2 presents excellent self-lubrication performance with a mean COF of 0.20 and a mean wear rate as low as 3.6 × 10−7 mm3 N−1 m−1.
期刊介绍：
Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International.
Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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