(Mg_2Si+SiC_p)/Mg复合材料的耐磨性  

Wear resistance of(Mg_2Si+SiC_p)/ Mg composites

作　　者：刘晓波[1,2] 赵宇光[1] 杨雯[1] 张家陶[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]北华大学机械学院,吉林吉林132021

出　　处：《吉林大学学报（工学版）》2011年第6期1618-1624,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50671044)

摘　　要：利用SEM等技术观察了(Mg2Si+SiCp)/Mg复合材料和纯镁的磨损表面,对比研究了几种材料在不同载荷、不同磨粒尺寸情况下的磨粒磨损行为。结果表明:复合材料中的Mg2Si和SiC增强颗粒能够起到较强的支撑作用,且不易破碎和脱落,很大程度上抑制了塑形变形的出现,抗磨损能力有了明显的提高;随着碳化硅含量的增加,磨损性能成上升趋势,且经过热挤压的复合材料要比铸态的磨损性能好;(Mg2Si+SiCp)/Mg复合材料的失效机制主要是磨粒磨损。A study on the abrasive wear behaviors of pure Mg and（Mg2Si＋SiCp）/Mg composites in the conditions of different loads and abrasive sizes has been presented.Their worn surfaces have been observed by SEM and extracted technology.The results show that the wear resistance of（Mg2Si＋SiCp）/Mg composites is much higher than that of pure Mg,because the firm Mg2Si and SiCp reinforced phases could restrain the occurring of plastic deformation,enhancing the ability of wear resistance.The wear resistance of（Mg2Si＋SiCp）/Mg composites increases with increasing the content of SiC particle.After hot-extrusion,（Mg2Si＋SiCp）/Mg composites exhibits the better wear resistance.And the failure mechanism of（Mg2Si＋SiCp）/ Mg composites mainly is abrasive wear.

关 键 词：金属材料 (Mg2Si+SiCp)/Mg复合材料 Mg2Si、SiC颗粒 磨粒磨损 耐磨性 

分 类 号：TG113[金属学及工艺—物理冶金]