Ni60/高铝青铜多元多相复合涂层制备及其微观结构特征  

Preparation of multivariate multiphase composite coatings of Ni60/high aluminum bronze and its microstructure characteristics

作　　者：杨效田[1] 李霞[2] 杨晓伟[1] 路阳[1] 王鹏春 李文生[1] 

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730050

出　　处：《哈尔滨工程大学学报》2016年第3期461-467,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51365024;51361020;51165021);国家国际科技合作项目(2013DFR50790);甘肃省有色金属新材料省部共建国家重点实验室开放基金资助项目(SKL1301);兰州理工大学博士基金资助项目

摘　　要：为了研究Ni基/Cu基复合合金涂层的微观结构特征,采用超音速等离子喷涂技术在45#钢基体上制备了高铝青铜质量分数30%的镍基合金/高铝青铜多元多相复合涂层。对复合涂层的组织结构特征、元素分布、相结构组成以及涂层的微观缺陷进行研究分析。结果表明:所制备的复合涂层中2种合金微结构呈叠加层状分布,组织结构具有梯度复合涂层特征,致密度高,微界面结合良好。高铝青铜合金和Ni60合金元素呈交错分布,相互之间出现互扩散特点。高铝青铜合金具有对Ni基合金微粒包裹作用和对微界面填充作用,并且2种合金之间发生了冶金反应,微界面结合牢靠。相对于纯Ni60合金涂层,高铝青铜的加入有效降低了复合涂层缺陷率,减小了缺陷尺寸。To investigate the microstructure characteristics of a multiphase composite coating of Ni-based / Cu-based alloys,we prepared multivariate multiphase composite coatings of Ni60 / high-aluminum bronze by supersonic plasma spraying technology on a #45 steel substrate,in which the content of high-aluminum bronze is 30%. We then analyzed the organizational structure,element distribution,phase composition,and micro-defects of the composite coatings. The results show that the microstructure of the composite coating of two kinds of alloys was distributed as a stacked layer arrangement,the organization structure had the characteristics of a gradient composite coating,the coating structure was compact,and the micro-interface integration was favorable. The elements of two types of alloys of high-aluminum bronze alloy and Ni60 were distributed in a staggered form,and mutual diffusion occurred. The high-aluminum bronze alloy cladded the Ni60 alloy particles and filled the micro-interface of the organizational structure. At the same time,a metallurgical reaction took place between the two kinds of alloys. As a result,the micro-interface bond was stable. Compared with the coating of pure Ni60 alloy,the addition of high-aluminum bronze can effectively reduce the coating defects and thus decrease the size of the defects of multivariate multiphase composite coatings.

关 键 词：超音速等离子喷涂 NI60 高铝青铜 多元多相复合涂层 微观结构 

分 类 号：TG146[一般工业技术—材料科学与工程]