8YSZ纳米粉(晶粒度为20nm)在800～1200℃范围内煅烧12h(温度间隔100℃),然后用大气等离子喷涂方法制备相应的涂层.对涂层的相成分、结构、结合强度、弹性模量和热震性能进行了详细分析.分析结果表明:当粉末的煅烧温度高于1000℃时,8YSZ晶粒度明显增大;涂层为双模式结构即熔化区和未熔化区,涂层的密度和熔化程度随温度升高而增加,并导致硬度和弹性模量增大;1200℃煅烧粉末所制备的涂层由于微裂纹或微孔缺陷增加,导致涂层的弹性模量减小.涂层的失效原因主要归因于热膨胀系数不匹配,涂层的热震寿命与其弹性模量呈反比关系.
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