CeO_2对W-2高温搪瓷涂层微观组织与抗热震性能的影响  

Effect of CeO_2 on Microstructure and Thermal Shock Resistance of W-2 High Temperature Enamel Coating

作　　者：安志斌[1] 张佩宇[1] 沈晓骏[1] 汪诚[1] 柴艳[1] 华云峰[2] 

机构地区：[1]空军工程大学等离子体动力学重点实验室,陕西西安710038 [2]西北有色金属研究院,陕西西安710016

出　　处：《热加工工艺》2016年第20期140-142,共3页Hot Working Technology

摘　　要：在镍基合金K403合金表面制备了添加2%CeO_2的W-2高温搪瓷涂层,采用原子力显微镜、扫描电镜和DIL402PC型热膨胀系数仪对涂层的微观组织形貌、热膨胀系数和热震稳定性进行分析。结果表明,相较于原始涂层,添加了CeO_2涂层的微观组织更加均匀致密,同时涂层与基体热膨胀系数差异减小,释放残余应力,显著提高了该搪瓷涂层的热震稳定性。2%CeO2-W-2 enamel coatings were prepared on nickel based alloy K403. SEM, AFM and DIL402PC thermal dilatometer were employed to investigate the microstructure, thermal expansion coefficient and thermal shock stability of the prepared coating. The results show that： compared with original coatings, the microstructure of the coating with CeO2 becomes more dense.The difference of thermal expansion coefficient between coating and matirx decreases, then, the residual stress is released, which can obviously improve the stability of thermal shock resistance of the coating.

关 键 词：氧化铈 搪瓷涂层 热膨胀系数 热震 

分 类 号：TG174.44[金属学及工艺—金属表面处理]