Simulation of thermal stresses in SiC-Al2O3 composite tritium penetration barrier by finite-element analysis
Simulation of thermal stresses in SiC-Al2O3 composite tritium penetration barrier by finite-element analysis
复制标题
SiC−Al2O3复合氚渗透屏障热应力有限元模拟
DOI：
10.1016/j.matdes.2009.01.025
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发表时间：
2009-09-01
影响因子：
8.4
通讯作者：
Xu, Jiang
中科院分区：
文献类型：
--
作者：
Liu, Hongbing;Tao, Jie;Xu, Jiang
为提高316L不锈钢衬底的抗氚穿透性能，提出了在316L不锈钢表面设置由Al_2O_3和碳化硅组成的氚穿透阻挡层。同时，应用功能梯度材料(FGM)的概念来降低由于热膨胀系数不匹配而导致的Al_2O_3与316L不锈钢之间的残余应力。采用有限元分析方法，数值研究了系统结构对复合涂层残余应力的影响。模拟结果表明，涂层中梯度性能和成分的存在确实减少了涂层与基材界面处的应力不连续性。涂层表面和涂层/基材界面上的残余应力大小与涂层厚度有关。(C)2009爱思唯尔有限公司。保留所有权利。
Tritium penetration barrier (TPB) composed of Al2O3 and SiC on 316L stainless steel was proposed to improve the tritium penetration resistance of the substrate in this work. At the same time, the concept of functionally graded materials (FGM) was applied to manage to decrease residual stresses between Al2O3 and 316L stainless steel substrate due to the mismatch of their thermal expansion coefficients. The effects of system architecture on the residual stresses developed in the composite coatings were investigated numerically by means of finite-element analysis (FEA). Modeling results showed that the presence of the graded properties and the compositions within the coating did reduce the stress discontinuity at the interfaces between the coating and the substrate. Also, the magnitudes of the residual stresses on the coating surface and at the coating/substrate interface were dependent on the Al2O3 and SiC coating thickness. (C) 2009 Elsevier Ltd. All rights reserved.