Microstructure and properties of thermal-sprayed NiCrWRE coatings

作     者：ZHANG Zhenyu WANG Zhiping LIANG Bunv ZHANG Zhenyu~(a,b) WANG Zhiping~b LIANG Bunv~a ~a Mechanical Engineering Department,Lanzhou Polytechnic College,Lanzhou 730050,China ~b State Key Laboratory of New Nonferrous Metal Materials,Lanzhou University of Technology,Lanzhou 730050,China

作者机构：Mechanical Engineering Department Lanzhou Polytechnic College Lanzhou 730050 China State Key Laboratory of New Nonferrous Metal Materials Lanzhou University of Technology Lanzhou 730050 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2008年第27卷第3期

页      面：261-265页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：This study was financially supported by the Natural Science Foundation of Gansu Province China(No.0710RJZA071) 

主　　题：NiCrWRE microstructure thermal-sprayed coatings wear resistance 

摘      要：The powders of NiCrW and NiCrWRE alloys were flame sprayed on a medium-carbon steel substrate by thermal spray welding. The micro- structure and tribological behavior of coatings were studied experimentally by means of scanning electron microscopy （SEM）, field emission gun scanning electron microscope （FEGSEM）, and wear tests. The addition of CeO2 modifies the coating morphology from a needle-like structure to a roughly cubic morphology; the refining and purifying effect of rare earth elements makes the microstmcture more compact and finer. Analysis of the worn surfaces reveals that the coatings with CeO2 addition show improved abrasive wear resistance over those without CeO2. By adding CeO2, the hardness of the coatings is significantly increased, and the wear resistance of the coatings is enhanced.