激光-等离子束复合制备热障涂层高温性能试验研究  

A Study on Elevate Temperature Characteristics of Laser-plasma Prepared Thermal Barrier Coatings

作　　者：张罡[1] 武颖娜[1] 梁勇[1] 冯钟潮[1] 张炳春[1] 李家麟[1] 刘方军[2] 

机构地区：[1]中国科学院金属研究所 [2]高能束流加工技术重点实验室,北京100024

出　　处：《材料工程》2003年第2期19-22,26,共5页Journal of Materials Engineering

基　　金：国防科技重点实验室基金资助 ( 99JS5 0 .4.1.ZK0 60 1)

摘　　要：在GH536高温合金基材上,采用矩形积分透镜,激光重熔等离子喷涂NiCrAlY/8YSZ热障涂层。1050℃的静态氧化试验和热震试验的结果表明:激光重熔可以改善热障涂层的抗氧化性能,能量密度33J·mm-2的激光重熔试样具有高于等离子喷涂试样的热震寿命,氧化阻力的改善与重熔层致密组织有关,微细网状裂纹释放热震应力的作用是热震寿命提高的主要原因。A CO2 continuous wave laser with BIZ transmissive beam integrators was used for laser remelting (LR) the surface of plasma sprayed (PS) ZrO28(mass fraction/%) Y2O3 (8YSZ) /Ni22Cr10AlY thermal barrier coatings (TBCs) on GH536 superalloy substrate The uniform energy distribution of beam with rectangular profiles of 9mm×3mm was obtained The thermal shock test and static oxidation test were conducted to both PS samples and LR samples at 1050℃ With the different failure criteria, the mechanism of failure was discussed The results show that oxidation resistance and thermal shock resistance are improved with laser specific energy density input of 33 J·mm2

关 键 词：热障涂层 激光重熔 等离子喷涂 热震试验 静态氧化试验 矩形积分透镜 陶瓷层 金属 

分 类 号：TG174.453[金属学及工艺—金属表面处理]