%0 Journal Article
%T Corrosion Behavior of AlPO4 as Environmental Barrier Coating in Water Vapor Enviroment
%A CHEN Xian-Hong
%A CHENG Lai-Fei
%A WANG Yi-Guang
%A ZHANG Li-Tong
%A HONG Zhi-Liang
%A WU Ya-Hui
%J 无机材料学报
%D 2009
%I Science Press
%R 10.3724/sp.j.1077.2009.00397
%X AlPO4 was synthesized by a Sol-Gel method. Its coefficient of thermal expansion (CTE) was measured by dilatometer. Its corrosion behavior was tested in an environment of 50vol%H2O/50vol%O2 with a flow rate of 0.085cm/s at 1350  The phases and composition of the samples were analyzed by X-ray diffraction and Energy Dispersive Spectroscope. The microstructures of AlPO4 were characterized by Scanning Electron Microscope. The results indicate that the CTE of AlPO4 matches with that of C/SiC composites and its corrosion resistance is much better than that of SiC. However, the decomposition of AlPO4 at high temperatures is the main problem in the water vapor enviroment￡  which will be accelerated in combination with silica.
%K environmental barrier coating￡  AlPO4￡  compatibility￡  water vapor corrosion
%U http://www.jim.org.cn/fileup/PDF/20090241.pdf