| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-insulating film capable of prolonging thermal fatigue life by self-repairing micro cracks due to repeated heating and cooling, and its production. SOLUTION: As to this self-repairing heat-insulating film, a ZrO2 type ceramic film is formed as a top coating layer 13 and a bond coating layer 12 to be a ground coat is formed into a gradient layer composed of NiCrAlY alloy and ZrO2 Y2 O3 , and further, the component concentration of Zr is decreased on the base material 11 side and is made gradient so that it is increased with the approach to the top coating layer 13 side. By this method, the heat-insulating film having self-repairing property can be obtained and thermal fatigue life can be prolonged. |
