粘结层表面预处理对EB-PVD热障涂层循环氧化的影响  

The effect of the pre-treatment of bond coat on the cyclic oxidation of EB-PVD TBCs

作　　者：徐前岗[1] 唐建新[1] 王宁[1] 陆峰[1] 吴学仁[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2004年第4期30-34,共5页Journal of Aeronautical Materials

基　　金：中俄合作项目(2002DFBA0002)

摘　　要：研究了在Ni3Al基高温合金基底上采用阴极电弧镀方法制备NiCoCrAlYHf粘结层、电子束物理气相沉积(EB PVD)方法制备Y2O3 ZrO2陶瓷层的热障涂层(TBCs)在1150～30℃之间的热循环氧化行为。通过对热循环过程中热障涂层界面韧性的测试和氧化行为的研究,分析了粘结层表面预处理工艺(喷丸和吹砂)对热障涂层使用寿命的影响。由于喷丸和吹砂会降低热障涂层的界面韧性,同时又促进了热生长氧化物(TGO)的生长,这些预处理工艺不利于提高热障涂层的寿命。The thermal cyclic oxidation behavior of a thermal barrier coatings, which is composed of a Ni_3Al-based superalloy substrate, NiCoCrAlYHf bond coat prepared by cathode vacuum arc deposition and Y_2O_3-ZrO_2 coating prepared by EB-PVD, was studied between 1150℃ and 30℃. On the basis of the measured interfacial toughness and investigation on the oxidation behavior of TBCs, the effect of the pre-treatment (shot peening and grit blast) of bond coat on the life of TBCs was analyzed. Shot peening and grit blast of bond coat, which decreased the interfacial toughness of TBCs and accelerated the growth of thermally grown oxide(TGO),were not benificial to improve the life of TBCs.

关 键 词：热障涂层 预处理 热循环氧化 粘结层 阴极电弧镀 使用寿命 失效行为 

分 类 号：TG174.46[金属学及工艺—金属表面处理]