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2009 , Vol. 24 >Issue 2: 397 - 401

DOI: https://doi.org/10.3724/SP.J.1077.2009.00397

研究论文

AlPO4环境障碍涂层材料水氧腐蚀性能研究

  • 陈贤鸿 ,
  • 成来飞 ,
  • 王一光 ,
  • 张立同 ,
  • 洪智亮 ,
  • 吴雅惠
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  • 西北工业大学 超高温结构复合材料国防科技重点实验室， 西安 710072

收稿日期: 2008-06-02

  修回日期: 2008-08-21

  网络出版日期: 2009-03-20

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Corrosion Behavior of AlPO4 as Environmental Barrier Coating in Water Vapor Enviroment

  • CHEN Xian-Hong ,
  • CHENG Lai-Fei ,
  • WANG Yi-Guang ,
  • ZHANG Li-Tong ,
  • HONG Zhi-Liang ,
  • WU Ya-Hui
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  • National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi’an 710072, China

Received date: 2008-06-02

  Revised date: 2008-08-21

  Online published: 2009-03-20

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摘要

采用溶胶凝胶法合成了一种AlPO4环境障碍涂层材料，测定了其热膨胀系数，在1350℃、50vol% H2O/50vol%O2、1.013×105 Pa、气体流速0.085cm/s的水氧耦合环境中研究了其抗水氧腐蚀性能，并利用X射线衍射仪、能谱分析仪和扫描电子显微镜分析了材料组成和微观结构.结果表明，AlPO4与C/SiC复合材料热膨胀基本匹配，抗水氧腐蚀性能良好.主要存在的问题是AlPO4分解引起的失重，二氧化硅会加速其分解.

关键词： 环境障碍涂层; AlPO4; 相容性; 水氧腐蚀

本文引用格式

陈贤鸿 , 成来飞 , 王一光 , 张立同 , 洪智亮 , 吴雅惠 . AlPO4环境障碍涂层材料水氧腐蚀性能研究[J]. 无机材料学报, 2009 , 24(2) : 397 -401 . DOI: 10.3724/SP.J.1077.2009.00397

Abstract

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.

Key words： environmental barrier coating; AlPO4; compatibility; water vapor corrosion

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