摘要
利用粉末冶金法制备纳米碳管/铝基复合材料,研究不同纳米碳管含量对复合材料硬度和稳态摩擦磨损行为的影响,采用扫描电子显微镜观察复合材料的磨损表面形貌,并对其磨损机制进行探讨.结果表明:随着纳米碳管质量分数的增加,复合材料的硬度呈现先增大而后减小的趋势,含质量分数为2%的纳米碳管复合材料硬度比铝增加约80%;复合材料的摩擦系数逐渐降低,磨损率先减小而后增大;含质量分数为1%的纳米碳管复合材料磨损机制为磨粒磨损和粘着磨损,而含质量分数为2%的纳米碳管复合材料以剥层磨损和疲劳磨损为主.
Carbon nanotubes reinforced aluminum matrix composites were fabricated by powder metallurgy method. The influence of different carbon nanobube content on hardness, the friction and wear behavior under steady-state conditions of the composites were investigated. The worn surfaces of composites were observed by scanning electron microscope, and worn mechanism of composites was discussed. The results indicated that the Vikers hardness of composites increased first and then decreased with carbon nanotube content increasing. 2.0% addition by mass of carbon nanotubes to the aluminum matrix of caused increases in the Vikers hardness of about 80%. The friction coefficient of composites was low and decreased with increasing carbon nanotube content. On the other hand, wear rate of composites decreased firstly and then increased. For composite of 1.0% CNTs, the wear mechanism was characterized as abrasive wear and adhesive wear, while the delamination wear and surface fatigue were the mainly mechanism for composite of 2.0% CNTs.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2007年第3期219-223,共5页
Tribology
基金
甘肃省自然科学基金资助项目(3ZS061-A25-039)
兰州理工大学科研发展基金资助项目(SB10200416)
关键词
纳米碳管
金属基复合材料
摩擦磨损性能
carbon nanotube, metal matrix composite, wear and friction behavior
