新型热障涂层材料研究进展(英文)  

Development on New Thermal Barrier Coating Materials

作　　者：曹学强[1] CAO Xueqiang(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学,硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《硅酸盐学报》2020年第10期1622-1635,共14页Journal of The Chinese Ceramic Society

基　　金：国家科技重大专项(2017-VI-0010-0081);中央高校基本科研业务费专项资金(203134004)。

摘　　要：热障涂层是高温下具有良好隔热性能的陶瓷涂层,在燃气轮机、内燃机、火箭发动机和其他高温热防护方面有重要应用。稀土或碱土金属氧化物稳定的氧化锆热障涂层材料已应用近60 a,其中最常用的是氧化钇稳定的氧化锆(YSZ)。近20 a,国内外发现了许多新材料,如稀土锆酸盐、铝酸盐和钽酸盐等。与YSZ相比,新材料在高温稳定性、热导率、抗烧结或热膨胀性能方面有优势,但断裂韧性低、成分复杂、单一陶瓷层的热循环寿命短。为了提高新型热障涂层的寿命,要严格控制涂层的制备过程、保持化学计量比,采用双陶瓷层结构的涂层。Thermal barrier coatings(TBCs) are ceramic coatings with a good thermal barrier effect at high temperatures, and have some important applications in the thermal protection of gas turbines, internal combustion engines, rocket engines and other high-temperature environments. Zirconia stabilized by rare-earth or alkaline earth oxides are used for nearly 60 a, and yttria stabilized zirconia(YSZ) is the mostly used material. Since last two decades, many materials are developed, i.e., nano-YSZ, rare earth zirconates, rare-earth aluminates, rare-earth tantanates, alkaline earth zirconates, etc.. New TBC materials have lower thermal conductivities, better sintering resistances and similar or larger thermal expansion coefficients, but much lower fracture toughness, more complicated compositions and therefore much shorter thermal cycling life rather than YSZ. In order to improve the durability of the TBC materials for high-temperature applications, the coating deposition process should be controlled effectively to keep a stoichiometric composition and the double-ceramic-layer(DCL) coatings could be applied.

关 键 词：热障涂层 稀土 氧化锆 锆酸盐 铝酸盐 

分 类 号：TB321[一般工业技术—材料科学与工程]