摘要
众所周知,热障涂层(TBC)主要包括粘接层和面层两部分。该文采用空气助燃超音速火焰喷涂(HVAF)和氧气助燃超音速火焰喷涂(HVOF)两种方法制备粘接层,大气等离子喷涂(APS)方法制备面层,来研究不同制备方法对TBC涂层微观结构和性能的影响。试验结果表明,HVAF和APS制备的TBC涂层,粘接层中氧化现象较少,热生长氧化物(TGO)生长相对致密均匀,以α-Al_2O_3为主,其它复合氧化物(NiO、CrNi、CoNi等)较少,表现出较好的高温性能。YSZ陶瓷面层隔热效果良好,是一种成本低廉的新型制备TBC涂层技术。
Thermal barrier coating （TBC） consists of an oxidation-resistant metallic bond coat and a zirconia-based top coat as everyone knows. In this work, the microstructure and general properties of thermal barrier coating（TBC） having bond coats prepared by High Velocity Air FueI（HVAF） and High Velocity Oxygen FueI（HVOF） thermal spraying and ceramic top coats prepared by Air Plasma Spray（APS） are studied. The result shows that the less degree of oxidation of bond coat in thermal barrier coating prepared by HVAF and APS, the growth of thermally grown oxide （TGO）, which consists of α-Al2O3 layer, are uniformity and densification, there is less mix oxide layer （mixture of NiO, CrNi, CoNi and so on） and exhibits excellent high temperature properties. The YSZ ceramic top coat hase good performance of heat insulation, furthermore, it is a low cost and new process and new technique for preparing the thermal barrier coating.
出处
《东方汽轮机》
2011年第3期66-74,共9页
Dongfang Turbine
