Recent progress in thermal/environmental barrier coatings and their corrosion resistance  

作　　者：Hong-Fei Chen Chi Zhang Yu-Chen Liu Peng Song Wen-Xian Li Guang Yang Bin Liu 

机构地区：[1]School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China [2]Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China [3]Institute of Materials,School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China

出　　处：《Rare Metals》2020年第5期498-512,共15页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51602188,51602187,51572166 and 51402183);the Program for Professor of Special Appointment(Young Eastern Scholar and Eastern Scholar)at Shanghai Institutions of Higher Learning(Nos.QD2015028,TP2015040 and TP2014041);the Yunnan Province Science and Technology Major Project(No.2018ZE009)。

摘　　要：Thermal/environmental barrier coatings(T/EBCs)play important roles in jet and/or gas turbine engines to protect the Ni-based superalloys and/or ceramic matrix composite substrates from the high-temperature airflow damage.Great efforts have been contributed to searching for enhanced T/EBC materials to improve the efficiency of the engines,which is the key of improving thrust-to-weight ratio and energy saving.The practical candidates,rare earth-contained materials,are widely used for T/EBCs in gas turbines due to their excellent properties such as low thermal conductivity,high melting point,hightemperature strength and durability as exhibited in yttriastabilized zirconia,pyrochlore oxides and rare earth silicates.In addition to the intrinsic properties,the microstructures obtained by different synthesis processes and the service performances,as well as the underlying failure mechanism,are also significant to this specific application.However,the main challenges for T/EBCs developments are T/EBC materials selection with balanced properties and their anti-corrosion performances at higher operating temperature.In this review,we summarized the progress in their fabrication techniques and mechanical/thermal properties of typically rare earth-contained T/EBCs,together with their anti-corrosion performance under the condition of molten salts or oxides(such as Na2SO4,V2O5and NaVO3),calcium–magnesium–alumina–silicate(CMAS)and high-temperature water vapor.

关 键 词：Thermal/environmental barrier coatings Yttria-stabilized zirconia Rare earth zirconates Rare earth silicates Corrosion resistance 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程] TG174.4[金属学及工艺—金属表面处理]