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材料工程  2015, Vol. 43 Issue (4): 37-41    DOI: 10.11868/j.issn.1001-4381.2015.04.007
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
新型Yb2SiO5环境障涂层1400℃高温氧化行为
贺世美1,2, 熊翔1, 何利民2
1. 中南大学 粉末冶金国家重点实验室, 长沙 410083;
2. 北京航空材料研究院, 北京 100095
High Temperature Oxidation Behavior of New Yb2SiO5 Environmental Barrier Coatings at 1400℃
HE Shi-mei1,2, XIONG Xiang1, HE Li-min2
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095, China
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摘要 采用电子束物理气相沉积和等离子喷涂工艺在Cf/SiC基体上制备出Si/3Al2O3·2SiO2+BSAS(1-xBaO-xSrO-Al2O3-2SiO2,0≤x≤1)/Yb2SiO5环境障涂层,研究该涂层在1400℃恒温环境下的抗氧化性能。结果表明:涂覆环境障涂层的Cf/SiC试样,在氧化实验进行到80h时开始出现失重。3Al2O3·2SiO2+BSAS中间层内的Ba和Al元素向外扩散,并在Yb2SiO5面层中发生反应生成BaO2和Al2Yb4O9,BSAS在1400℃恒温氧化环境下发生烧结和收缩,以及由于热膨胀系数差异造成的环境障涂层内残余应力的产生均是导致涂层过早剥落失效的主要原因。
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贺世美
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关键词 Yb2SiO5环境障涂层高温氧化失效    
Abstract:Si/3Al2O3·2SiO2+BSAS(1-xBaO-xSrO-Al2O3-2SiO2,0≤x≤1)/Yb2SiO5 environmental barrier coating(EBC) was prepared, based on Cf/SiC substrate by electron beam physical vapor deposition(EB-PVD)and plasma spraying(PS). High temperature oxidation behavior of EBC was studied at 1400℃ constant temperature environment. The results indicate that the mass loss of Cf/SiC specimens with EBC coating occurs when exposure to 80h under oxidation experimental conditions. Ba and Al contained in the 3Al2O3·2SiO2+BSAS middle layer diffuse outward to Yb2SiO5 top coating, then two new phases of BaO2 and Al2Yb4O9 are formed. The early sintering and volume shrinkage of BSAS at 1400℃, and the residual stresses induced by the mismatch of thermal expansion coefficients among mullite, all are the primary factors leading to the spallation of EBC.
Key wordsYb2SiO5    environmental barrier coating    high temperature oxidation    failure
收稿日期: 2013-07-23     
1:  TG174  
通讯作者: 熊翔(1963-),男,教授,博士生导师,主要从事C/C复合材料、金属基和陶瓷基复合材料的研究,联系地址:湖南省长沙市中南大学粉末冶金国家重点实验室(410083),xiongx@csu.edu.cn     E-mail: xiongx@csu.edu.cn
引用本文:   
贺世美, 熊翔, 何利民. 新型Yb2SiO5环境障涂层1400℃高温氧化行为[J]. 材料工程, 2015, 43(4): 37-41.
HE Shi-mei, XIONG Xiang, HE Li-min. High Temperature Oxidation Behavior of New Yb2SiO5 Environmental Barrier Coatings at 1400℃. Journal of Materials Engineering, 2015, 43(4): 37-41.
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http://jme.biam.ac.cn/jme/CN/10.11868/j.issn.1001-4381.2015.04.007      或      http://jme.biam.ac.cn/jme/CN/Y2015/V43/I4/37
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