等离子喷涂纳米结构氧化锆涂层硬度研究
Research on Hardness of Nano-structured ZrO2 Ceramic Coating Prepared by Plasma Spraying
陈进武1, 曹轶杰1, 李 强2
点击：2947次 下载：0次
作者单位：(1. 桂林航天工业高等专科学校 机械工程系, 广西 桂林 541004; 2. 福州大学 材料科学与工程学院, 福建 福州 350108)
中文关键字：等离子喷涂； 纳米氧化锆； 显微硬度； 韦伯统计； 双态分布
英文关键字：plasma spraying; nano-structured zirconia; microhardness; Weibull statistic; bimodal distribution
中文摘要：采用等离子喷涂技术制备纳米结构氧化锆陶瓷涂层，通过扫描电镜观察发现涂层中存在两种相，即熔化相和未熔相，利用定量金相分析法计算两相的含量。在统计分析的基础上，研究了纳米氧化锆涂层断面的Vickers显微硬度。从硬度分布的Weibull图中可以看出，纳米氧化锆涂层的显微硬度存在双态分布，与涂层的两相组织一致。
英文摘要：Nano-structured ZrO2 ceramic coating was prepared by plasma spraying. Two phases were observed in the coating using scanning electronic microscope, which were described as molten and non-molten phases. The percentage of two kinds of material was determined using quantitative image analysis. The vickers microhardness of nano-structured ZrO2 coating was investigated following the statistical analysis. It is observed that the microhardness presents a bimodal distribution in their Weibull plots, indicating the presence of the bimodal microstructure.