摘要
采用等离子喷涂方法在304不锈钢表面制备NiCoCrAlY2O3/(ZrO2+25%CeO2+3%Y2O3)耐高温涂层,模拟铸造模具表面的工作环境,涂层在1350℃铁水液中加热热震和在炉中大气环境下加热热震后,对涂层组织结构和物相变化进行了对比研究。结果表明:涂层在铁水中热震后,涂层内部的大量裂纹交联在一起,在陶瓷层与粘结层界面靠近陶瓷层一侧出现尺寸近10μm宽的裂纹,陶瓷层中的部分四方相向单斜相和立方相转变,铁水中部分元素与陶瓷元素发生了扩散并生产新相。
The NiCoCrAlY2O3/（ZrO2＋25 % CeO2＋3 % Y2O3） ceramic coating was prepared on the surface of 304 stainless steel,working environment of casting die was simulated and thermal shock resistance of coating was studied under the conditions of heating in the 1350 ℃ molten iron and the air,then reaching the organization structure and performance.The experimental results showed that,after thermal shock in molten iron,lots of cracks in the ceramic have been cross linked,the size of nearly 10 μm wide crack can be observed near the side of the ceramic coating of the ceramic coating and bond coating interface,part of the tetragonal ceramic transited into monoclinic phase and cubic phase,some elements of molten iron and ceramic have been diffused and produced a new phase in the coating.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2010年第3期10-13,共4页
China Surface Engineering
