Microstructure and properties of Al_2O_3-13%TiO_2 coatings sprayed using nanostructured powders

作     者：ZHANG Jianxin HE Jining DONG Yanchun LI Xiangzhi YAN Dianran ZHANG Jianxin, HE Jining, DONG Yanchun, LI Xiangzhi, and YAN Dianran School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China

作者机构：School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2007年第26卷第4期

页      面：391-397页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：surface coating nanostructured coating plasma spray microhardness wear resistance 

摘      要：The microstructure and wear performance of M203-13% TiO2 coatings prepared by plasma spraying of agglom- erated nanoparticle powders were investigated. SEM analysis showed that the as-sprayed Al2O3-TiO2 coatings comprise of two kinds of typical region： fully melted region and unmelted/partially melted nanostructured region, which is different than the conventional coating with lamellar structure. It is shown that the microhardness of the nanostructured coatings was about 15%-30% higher than that of the conventional coating and the wear resistance is significantly improved, especially under a high wear load. The nanostructured coating sprayed at a lower power shows a lower wear resistance than the coatings produced at a higher power, because of the presence of pores and microstructural defects which are detrimental to the fracture toughness of the coatings.