水热腐蚀老化对热障涂层的摩擦磨损性能的影响

周文晖, 宋健, 陈泽浩, 杨兰兰, 王金龙, 陈明辉, 朱圣龙, 王福会

Effect of Low Temperature Degradation on Tribological Properties of YSZ Thermal Barrier Coatings

ZHOU Wenhui, SONG Jian, CHEN Zehao, YANG Lanlan, WANG Jinlong, CHEN Minghui, ZHU Shenglong, WANG Fuhui

图8 H组试样反复相变示意图

Fig.8 Schematic representations of phase transition of H group of samples (a) as-deposited coating; (b) water penetration in the ceramic top coating, the phase transformation of some YSZ grains from t-phase to m-phase happened, resulting in the volume expansion of the grains; (c) the m-phase transfomed to t-phase at high temperature and then the volume of the grains decreased. During this process, the accumulation of irreversible volume change induced the initiation of cracks