【摘要】 采用机械搅拌与高能超声处理法制备了纳米SiCp增强AZ91D镁基复合材料(n-SiCp/AZ91D),研究了n-SiCp含量及温度对材料摩擦磨损性能的影响。结果表明,AZ91D镁合金中加入n-SiCp能够改善材料的耐磨损性能,并随着n-SiCp添加量的增加,耐磨损性逐渐增加。基体和复合材料在室温至300℃范围内,经历了从轻微摩擦磨损到严重磨损的转变。复合材料从轻微摩擦磨损到严重磨损的转变温度比基体提高了50℃,另外,复合材料还表现出较好的耐高温磨损性能。更多还原

【Abstract】 Nano-sized SiC particles reinforced magnesium matrix composites(n-SiCp/AZ91D) were fabricated by mechanical stirring combining with high intensity ultrasonic dispersion processing.Influences of n-SiCp content and temperature on the friction and wear behavior of the composites prepared were investigated by a ball-on-disc testing.The results show that the resistant friction and wear behavior of the nano-composites is improved greatly with nano-SiC particle,and with the increase of n-SiCp content,it is gradually enhanced.Temperature plays important roles in controlling resistant friction and wear behavior of the nano-composites prepared.From room temperature to 300 ℃,both the AZ91D alloy and its composites undergo mild-to-severe wear regime change.The transition temperature of the nano-composites prepared from mild to sever wear is increased by 50 ℃,compared with that of AZ91D matrix.In addition the nano-composites exhibit better high-temperature resistant friction and wear bahvior.更多还原