将纳米ZrO2-8wt%Y2O3和纳米ZrO2-8wt%Y2O3中掺杂25wt%纳米CeO2(CeO2/ZrO2-8wt%Y2O3)的两种粉末进行团聚处理,用等离子喷涂方法在GH30高温合金表面分别制备了两种材料热障涂层.用扫描电镜、透射电镜和X射线衍射仪对掺杂了25wt%纳米CeO2的团聚体粉末和涂层的微观组织结构进行分析研究,测试比较了两种涂层在900、1100和1300℃时的热震性能,并试验了两种涂层在1050℃、保温100h后的抗氧化能力.结果表明,纳米粉末经团聚处理后为多孔的球形结构,掺杂纳米CeO2涂层组成相为稳定的t相(t-ZrO2、t-Zr0.82Y0.18O1.91、t-Zr0.82Ce0.8O2)和c相(c-CeO2),并保持纳米组织结构,平均晶粒尺寸为45nm,其抗热震性能和氧化性能要高于纳米ZrO2-8wt%Y2O3涂层.
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