摘要
采用纳米掺杂（5%-30%）方法制备出纳米包覆微米级粒子的AT13等离子喷涂粉末,并利用大气等离子喷涂技术制备出了含有纳米复相结构的陶瓷涂层。在MM-200型磨损试验机上进行了常温干摩擦试验,比较了纳米复相结构涂层和传统陶瓷涂层的耐磨性能,利用扫描电镜观察了磨损后的磨痕形貌。结果表明,纳米复相涂层的耐磨性能明显好于传统陶瓷涂层,且随着磨损载荷的增大,纳米复相涂层和传统涂层的磨损机制的变化是不同的,传统涂层的磨损机理主要是微裂纹和颗粒的剥落,而相同条件下纳米复相涂层则由于涂层韧性的提高,主要表现为涂层的粘着磨损与局部剥落,并对纳米掺杂等离子喷涂涂层对AT13涂层磨损机制的影响进行了探讨。
Micrometer particle ATl3 plasma spraying powder coated by nano particles was prepared by nano-doping method, also the ceramic coatings of multi-phase structure were prepared by arc plasma spraying. Room-temperature dry friction experiment was carried out on MM-200 wear test machine, wear resistance of the nano multi-phase coatings was compared with that of the traditional ceramic coating, and worn surface of the coatings was observed using SEM. The results shows that the wear resistance of nano multi-phase coating is superior than that of the conventional one, however, as the increase of wear loading their wear mechanisms are different, the wear mechanism of conventional coating is micro crack and flaking of particles, and the mechanism of nano multi-phase coating is adhesion wear, part peel off in the same conditions for the increase of its impact strength. The influence of nano doped plasma coating on wear mechanism is also discussed.
出处
《金属热处理》
CAS
CSCD
北大核心
2008年第10期57-62,共6页
Heat Treatment of Metals
基金
国家自然科学基金资助项目(50372054)
