等离子喷涂氧化锆纳米涂层显微结构研究  

Microstructure of Nanostructured Zirconia Coating Prepared by Atmospheric Plasma Spraying

作　　者：陈煌[1] 丁传贤[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2002年第4期882-886,共5页Journal of Inorganic Materials

摘　　要：利用大气等离子喷涂（APS）技术,在不锈钢基体上制备了氧化锆纳米结构涂层.运用XRD、SEM与TEM等分析手段对喷涂用粉末原料和涂层的显微结构、物相组成进行了观察和确定.实验结果表明,纳米氧化锆粉末经喷雾造粒后的颗粒粒径主要分布在15～40μm之间,流动性好,适合于等离子喷涂用.等离子喷涂氧化锆纳米涂层颗粒分布在60～120nm之间,晶粒发育良好.涂层物相由四方和立方相氧化锆所组成.氧化锆纳米涂层的气孔率约为7％,结合强度为45MPa。A nanostructured zirconia coating was fabricated successfully by atmospheric plasma spraying (APS). The microstructure and phase composition of the coating were characterized with SEM, TEM and XRD, respectively. The granulated powders with sizes in the range of 15 to 40mum have excellent flowability and are suitable for plasma spraying process. The grain size of the as-sprayed zirconia coating has a distribution range from 60 to 120nm, and the grain boundary is clear. The as-sprayed nanostructured ZrO2 coatings are composed of tetragonal and cubic phases of zirconia, and their porosity and tensile strength are about 7% and 45MPa respectively.

关 键 词：等离子喷涂 氧化锆涂层 显微结构 喷雾造粒 纳米结构 不锈钢 

分 类 号：TG174.442[金属学及工艺—金属表面处理]