Development of Self-crack-healing Coating Technique and its Application for Heat Resistant Superalloy

制备了一种在高温环境下具有自愈合能力的SiNx/SiCy纳米层合膜。研究了愈合条件和膜结构对愈合能力的影响。对于SiN单层薄膜，加热后裂纹愈合较差。另一方面，在SiNx/SiCy纳米层合膜中，裂纹发生了愈合。随着加热温度的升高和加热时间的延长，裂纹的愈合速度加快。在SiNx/SiCy纳米层合膜的自裂纹愈合能力和抗热震性之间存在着一种权衡。

A SiNx/SiCy nano-laminated film with a self-crack-healing ability under high temperature environment was fabricated. The influence of healing condition and film structure on the healing ability was investigated. In the case of the SiN monolayer film, the crack was poorly healed after heating. On the other hand, in the SiNx/SiCy nano-laminated film, crack healing occurred. The crack healing improved on increasing the heating temperature and time. There is a trade-off between the self-crack-healing ability and the thermal shock resistance in SiNx/SiCy nano-laminated film.