Oxidation happened on the surface of infiltrated layer when thermal cycling times was less than 20, and no cracks was observed.
结果表明：热循环次数小于20次时，渗层表面主要产生氧化，无裂纹产生；
Oxidation happened on the surface of infiltrated layer when thermal cycling times was less than 20, and no cracks was observed.
结果表明：热循环次数小于20次时，渗层表面主要产生氧化，无裂纹产生；
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