摘要
以NiCrAlY为金属黏结层材料、以Al_2O_3和ZrO_2为陶瓷层材料,采用等离子喷涂技术在304不锈钢表面制备了3种热障涂层,通过扫描电子显微镜(SEM)和X射线衍射仪(XRD)分别对涂层的微观形貌和晶相进行了表征,并研究了涂层的抗高温氧化性能和抗热震性能。结果表明:NiCrAlY/Al_2O_3/ZrO_2复合结构热障涂层表面无孔洞和裂纹等缺陷,高温氧化后该涂层主要包括Mg_2Zr_5O_(12)和(Fe,Mg)(Cr,Fe)_2O_4两种晶相;由于Al_2O_3的阻氧作用,NiCrAlY/Al_2O_3/ZrO_2涂层具有最佳的抗高温氧化性能;NiCrAlY/ZrO_2涂层层间材料的热膨胀系数呈梯度变化,表现出最佳的抗热震性能。
Three kinds of thermal barrier coating were prepared on the surface of 304 stainless steel by plasma spraying method with NiCrAlY served as metal bonding layer material and Al2O3 and ZrO2 served as the ceramic layer materials.The microscopic morphology and crystalline phase of the coating was characterized by scanning electron microscope（SEM）and X-ray diffractometer（XRD）.The high temperature oxidation resistance and thermal shock resistance of the coating were also studied.The results show that NiCrAlY/Al2O3/ZrO2 composite structural thermal barrier coating surface did not have any hole and crack,and there were Mg2Zr5O（12） and（Fe,Mg）（Cr,Fe2O4 crystalline phase in the coating after high temperature oxidation.NiCrAlY/ZrO2 coating had the best high temperature oxidation resistance because of the oxygen barrier effect of Al2O3.The thermal expansion coefficient of interlayer material in NiCrAlY/ZrO2 coating had a gradient trend and the coating exhibited the best thermal shock resistance.
作者
杨宏波
刘朝辉
易童彬
刘娜
舒心
罗平
YANG Hongbo;LIU Zhaohui;YI Tongbin;LIU Na;SHU Xin;LUO Ping(,Department of Military Facility, ALUP, Chongqing 401311, China;No.59 Institute of China Weapons Industry, Chongqing 401311, China)
出处
《机械工程材料》
CSCD
北大核心
2017年第11期63-67,72,共6页
Materials For Mechanical Engineering
基金
重庆市研究生科研创新项目(CYS16238)
全军后勤科研计划重点项目(BX110C016)
关键词
等离子喷涂
热障涂层
抗高温氧化性能
抗热震性能
plasma spraying
thermal barrier coating
high temperature oxidation resistance
thermal shock resistance
