摘要
以7055Al为基体,通过粉末冶金法分别制备碳化硅(SiC)颗粒、碳纳米管(CNT)以及SiC和CNT混杂增强7055Al复合材料,并对三种复合材料的干滑动摩擦磨损行为进行研究。结果表明:随着载荷提高,复合材料磨损失重增加,摩擦因数略有降低。在0.5 MPa与1.0 MPa载荷条件下,SiC-CNT/7055Al复合材料磨损失重低于单一SiC/7055Al和单一CNT/7055Al复合材料。2.0 MPa时,SiC-CNT/7055Al复合材料磨损失重急剧增加。随着载荷提高,CNT/7055Al复合材料耐磨性逐渐增加,在中、高载荷下,材料具有更为优异的耐磨性。SiC/7055Al复合材料磨损量则随着载荷提高,磨损失重逐渐增加,当载荷为2.0 MPa时,材料磨损量增加幅度较小。
Silicon carbide(SiC)particles,carbon nanotubes(CNT),SiC and CNT hybrid reinforced 7055Al composites were prepared by powder metallurgy with 7055Al as matrix.The dry sliding friction and wear behavior of the three composites were studied.The results show that the wear mass loss increases and the friction coefficient decreases slightly with the increase of the load.The wear mass loss of the SiC-CNT/7055Al composite is lower than that of the single SiC/7055Al and CNT/7055Al reinforced composites at 0.5 MPa and 1.0 MPa.The wear mass loss of the SiC-CNT/7055Al composite increases rapidly at 2.0 MPa.With the increase of the load,the wear resistance of CNT/7055Al composite increases gradually;under medium and high load,the composite owns better wear resistance.The wear amount of SiC/7055Al composite increases gradually with the increase of the load,and the wear mass loss increases little at load of 2.0 MPa.
作者
张军
刘崇宇
ZHANG Jun;LIU Chong-yu(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,Guangxi,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2020年第11期131-139,共9页
Journal of Materials Engineering
基金
广西科技重大专项资助项目(桂科AA17202007)。
关键词
粉末冶金
混杂增强铝基复合材料
干滑动摩擦磨损
磨损机制
powder metallurgy
hybrid reinforced aluminum matrix composite
dry sliding friction and wear
wear mechanism
