为了改善抗高温复合陶瓷涂层的抗氧化性能,提高其使用寿命,将氧化钇-氧化铝溶胶复合亚微米级YSZ(YSZ为5%Y2O3部分稳定的ZrO2)与纳米α-Al2O3粉体制备成料浆,涂覆于MCrAlY合金基体表面,经过热压7滤、压滤微波烧结技术形成α-Al22O3/YSZ复合陶瓷涂层.采用X射线衍射(XRD)、场发射扫描电镜(FE-SEM)、静态循环氧化试验等研究了涂层的结构和性能.结果表明:涂层结构致密无微裂纹,呈现Al2O3颗粒包覆YSZ颗粒的复合结构;1 000℃循环氧化200h后涂层与基体结合紧密,没有剥落现象;压滤微波烧结后相组成主要为α-Al2O3,m-ZrO2,t-ZrO2.该复合陶瓷涂层具有优异的抗高温氧化和抗剥落性能.
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