MN+1AXN相及其复合材料的摩擦学性能研究进展

材料导报, 2009, 23(1): 12-15.

MN+1AXN相及其复合材料的摩擦学性能研究进展

任书芳 ^1, , 孟军虎 ^2, , 吕晋军 ^3, , 杨生荣 ^4,

1.中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州,730000;中国科学院研究生院,北京,100039

2.中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州,730000

3.中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州,730000

4.中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州,730000

基金项目: 国家自然科学基金(50675216) 中国科学院西部博士项目

关键词： MN+1AXN相 , 氧化物薄膜 , 摩擦磨损

Research Progress in Tribological Properties of MN+1AXN Phases and Their Composites

MN+1AXN相是一类三元层状化合物,其特殊的价键结构和晶体结构使其同时具备了金属和陶瓷的优异性能.然而其摩擦学性能受多种因素影响,例如滑动速率、载荷、温度、偶件种类等.常温较低滑动速率下,其摩擦学性能较差,较高的摩擦系数和磨损率源于多晶态MN+1AXN中MN+1AXN晶粒的断裂和脱落,并且多数情况下伴随着材料的转移与粘附.而在较高的滑动速率或者较高的温度下,MN+1AXN也能表现出较优异的摩擦学特性,这主要是因为摩擦过程中其表面生成了光滑致密的氧化物润滑薄膜.这层氧化物薄膜起到了减摩抗磨作用.综述了目前MN+1AXN相及其复合材料摩擦学方面的研究,提出了使MN+1AXN相在宽温度范围具有优异摩擦磨损性能的方法.

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