Ce对高铝青铜超音速等离子喷涂层组织结构的影响  

Effect of Ce on microstructure of high-aluminum-bronze coating prepared with supersonic plasma spraying

作　　者：杨效田[1] 李霞[2] 路阳[1] 杨晓伟[1] 施晓雨[1] 王鹏春 

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州交通大学化学与生物工程学院,甘肃兰州730070

出　　处：《兰州理工大学学报》2015年第6期17-21,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51165021);国家国际科技合作项目(2013DFR50790)

摘　　要：将稀土Ce和高铝青铜粉体通过研磨混合,采用超音速等离子喷涂技术制备含稀土Ce的高铝青铜合金粉体涂层,采用XRD、SEM、EDS等手段对不同铈含量的高铝青铜合金粉体喷涂层表面组织、微观应力和界面元素扩散进行观察和分析,研究微量稀土元素铈对高铝青铜合金粉体涂层组织结构和界面元素扩散的影响.结果表明:粉体研磨后,铈粉以片状和碎块状方式粘结在高铝青铜粉体颗粒表面,并且出现微合金化现象.高铝青铜合金粉体的喷涂流动性和熔覆性随含铈量的增加而变大,涂层表面存在微观压应力,并随着含铈量的增加压应力呈现先降低后增加的趋势.随铈含量的增加,涂层合金与基体表面润湿性能增强,界面处Cu、Al元素贫化现象减弱.The rare-earth element Ce and high-aluminum-bronze powder were mixed after grinding and the coating of high-aluminum-bronze alloy powder was prepared with supersonic plasma spraying technique.XRD,SEM,EDS was used to observe and analyse the microstructure,microstress and interface element diffusion of coating surface with different cerium content in the coating.More over,the effect of rare-earth cerium on microstructure and interface elements diffusion of the coating was researched.The results showed that after grinding,the cerium powders would adhere to the particle surface of high-aluminumbronze powder in the form of flake and fragment,and the phenomenon of microalloying would occur.The liquidity and fusion-covering property of the coating of high-aluminum-bronze alloy powder would increase with cerium content.In the surface of the coating would exist compressive stress and it would decrease first and then increase with cerium content.The wettability can enhance between coating and substrate surface,and the impoverishment phenomenon of the elements Cu and Al reduce in the interface region.

关 键 词：高铝青铜粉体 稀土 涂层 扩散距离 

分 类 号：TG146[一般工业技术—材料科学与工程]