Fe_3Al/Al_2O_3梯度复合涂层的摩擦磨损性能  

Friction and Wear Behavior of Fe_3Al/Al_2O_3 Composite Gradient Coating

作　　者：尹衍升 张景德[1] 李嘉[1] 甄玉花[1] 张银燕[1] 陈云[1] 

机构地区：[1]山东大学工程陶瓷山东省重点实验室,山东济南250061

出　　处：《摩擦学学报》2003年第5期376-379,共4页Tribology

基　　金：国家自然科学基金资助项目(50242008);山东省自然科学基金资助重点项目(Z2002F02).

摘　　要：利用等离子喷技术在钢表面制备了Fe3Al/Al2O3梯度涂层以及Fe3Al-Al2O3双层涂层和Fe3Al-Fe3Al/50%Al2O3-Al2O3三层涂层,采用MRH-3型环-块摩擦磨损试验机对比考察了涂层摩擦磨损性能,采用扫描电子显微镜观察分析磨损表面形貌.结果表明,梯度涂层成分沿涂层厚度方向存在差异,相应的耐磨性能和磨损机制亦有所不同,梯度涂层的主要磨损机制包括颗粒脱落、裂纹萌生与扩展、微区脆裂层状脱落、塑性变形和粘着损伤等.Fe3Al/Al2O3 gradient coating, Fe3AlAl2O3 doublelayer coating, and Fe3AlFe3Al/50%Al2O3Al2O3 triplicate coating were prepared on steel substrate by plasma spraying. The friction and wear behaviors of the resulting coatings in dry sliding against MRH3 high speed block were investigated on an MRH3 blockonring test rig at ambient temperature. The worn surfaces of the coatings were observed with a scanning electron microscope. Results indicated that the Fe3Al/Al2O3 gradient coating had better wearresistance than the Fe3AlAl2O3 doublelayer coating and Fe3AlFe3Al/50%Al2O3Al2O3 triplicate coating, which was attributed to the gradient structure of the Fe3Al/Al2O3 gradient coating. The Fe3Al/Al2O3 gradient coating showed variation in the wear mechanisms along its depth, which was related to the changes in the composition of the gradient coating at different friction and wear test durations. The gradient coating was characterized by particulate detachment, microcrack nucleation and propagation, brittle fracture, plastic deformation, and adhesive wear.

关 键 词：Fe3Al/Al2O3复合材料 梯度涂层 摩擦磨损性能 

分 类 号：TB174.442[生物学—生物工程] TH117.3[机械工程—机械设计及理论]