【摘要】 在干摩擦条件下,对SiC颗粒含量20%的铝基复合材料在2~20 MPa载荷和200r/min、400r/min的滑动摩擦速度下进行摩擦系数及磨损率变化分析,并结合对磨损表面的SEM和EDS分析,探讨了SiC颗粒增强铝基复合材料的性能,并建立了在不同载荷和速度下的摩擦磨损机理图。研究表明,当载荷和摩擦速度都相对较低时,磨损表面主要为轻微的磨粒磨损,并伴随氧化磨损。当载荷达到10 MPa时,会发生轻微磨损向严重磨损转变,逐渐出现剥层磨损。最后在载荷为20 MPa、摩擦速度为400r/min时,材料表面产生严重的粘着磨损。更多还原

【Abstract】 Under the condition of dry friction,the friction coefficient and wear rate of the aluminum metal matrix composites with 20vol% silicon carbide particle were measured over a load range of 2-20 MPa at sliding velocities of 200r/min and 400r/min.In addition,the wear performance is studied and the mechanism diagram of friction and wear at different loads and sliding friction speed is established through microstructure analysis by SEM and elemental analysis by EDS.The results show that when loads and friction speed were relatively low,the main wear mechanism was slight particle wear,accompanied by oxidation wear.When load reached 10 MPa,the process turned from slight wear to severe wear,and delamination wear appeared gradually.At last,severe adhesive wear occured on the surface of the material with the load of 20 MPa and sliding speed of 400r/min.更多还原