摘要
采用3kW射频电源在经真空电弧镀涂敷了NiCrAlY过渡层的涡轮和导向叶片上沉积ZrO2陶瓷层。对NiCrAlY涂层进行喷丸形变处理,研究了喷丸工艺对NiCrAlY涂层显微结构、相结构、残余应力和高温氧化性能的影响。结果表明:喷丸形变处理使涂层表面拉应力变为压应力;消除了NiCrAlY涂层气孔等缺陷,表面粗糙度Rz值由16.4μm减小到3.3μm;喷丸后涂层抗氧化性提高3倍。
Thermal barrier coating (TBC) was obtained by radio frequency (RF) magnetron sputtering on the turbine and blades deposited with NiCrAlY coating. Then the NiCrAlY coating was treated by shot blasting, and the effect of blasting process on the microstructure, phase structure, residual stress and high temperature oxidation resistance of coating was studied. The gas porosity in the NiCrAlY bond coating was eliminated and the whole depth profile was residual compressive stress after blasting. Surface roughness Rz value was increased from 16.4 μm to 3.3 μm. The oxidation resistance of blasting coating was improved 3 times.
出处
《材料保护》
CAS
CSCD
北大核心
2003年第7期11-12,共2页
Materials Protection
关键词
热障涂层
残余应力
射频磁控溅射
喷丸形变
thermal barrier coating
residual stress
RF magnetron sputtering
shot blasting
