等离子喷涂纳米Al_2O_3-13%TiO_2涂层组织与性能  

Microstructure and Properties of Nano-Structured Al_2O_3-13%TiO_2 Coating by APS

作　　者：王全胜[1] 王富耻[1] 柳彦博[1] 李轶昳[1] 马壮[1] 

机构地区：[1]北京理工大学材料科学与工程学院材料加工系,北京100081

出　　处：《稀有金属材料与工程》2007年第A02期530-532,共3页Rare Metal Materials and Engineering

摘　　要：采用大气等离子喷涂方法制备了纳米结构Al_2O_3-13%TiO_2(质量分数,下同)涂层,进行了SRV滑动磨损试验,通过扫描电镜对涂层的断口显微组织及磨损表面形貌进行了观察,并测定了涂层的显微硬度。结果表明,该纳米涂层具有独特的显微组织结构特征,层片间具有冶金结合特征的界面较多,界面结合得到明显改善,其显微硬度明显高于微米涂层,具有优良的耐磨性能,其磨损面积仅为常规微米涂层的1/5,界面结合改善是耐磨性提高的主要原因。Nano-structured Al2O3-13% TiO2 coating was manufactured by APS （Air Plasma Spraying）. The resistance to sliding wear was tested by SRV frictional wear instrument. The fracture microstructure and worn-out surface morphology of specimens were observed by SEM （Scanning Electron Microscope） and the hardness of coatings was measured. The results show that the nanostructured coating is possessed of a unique microstructure, and more interfaces with metallurgical bonding appear among the splats, which lead to the obvious improvement of interface bonding. The resistance to sliding wear is excellent due to the higher micro-hardness. The worn area is only 1/5 of that of the conventional coating. The enhancement of interface bonding is mainly attributed to improving of resistance to sliding wear.

关 键 词：纳米Al2O3-13% TIO2涂层 滑动磨损 断口组织 

分 类 号：TG174.4[金属学及工艺—金属表面处理]