考虑化学氧化效应时热障涂层氧化物的生长规律

柴怡君; 林晨; 李跃明

doi:10.3879/j.issn.1000-0887.2015.04.008

考虑化学氧化效应时热障涂层氧化物的生长规律

doi: 10.3879/j.issn.1000-0887.2015.04.008

机械结构强度与振动国家重点实验室(西安交通大学),西安 710049

基金项目: 国家重点基础研究发展计划（973计划）(2013CB035704); 国家自然科学基金(11472206)

详细信息

作者简介:
柴怡君(1991—),女,河南新乡人,硕士生(E-mail: cyj1991@stu.xjtu.edu.cn);李跃明(1961—),男,江苏无锡人,教授,博士生导师(通讯作者. E-mail: liyueming@mail.xjtu.edu.cn).

中图分类号: O344
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出版历程
- 收稿日期: 2014-09-24
- 修回日期: 2015-01-06
- 刊出日期: 2015-04-15

Growth Trend of Thermal Grown Oxide in TBCs Under Chemical Oxidation Effect

State Key Laboratory for Strength and Vibration of Mechanical Structures (Xi’an Jiaotong University), Xi’an 710049, P.R.China

Funds: The National Basic Research Program of China(973 Program)(2013CB035704); The National Natural Science Foundation of China(11472206)

摘要

摘要: 基于考虑氧化效应的Fick定律以及Voigt均匀性假设的氧化区两相材料的本构关系，开发了ABAQUS用户单元子程序.并基于重构的可反映热障涂层界面真实形貌的二维有限元模型，计算分析了氧化效应对TGO生长规律的影响，以及TC-TGO和BC-TGO界面的应力场分布.结果表明，未考虑氧化效应仅能获得TGO均匀生长的模拟结果，而考虑氧化效应得到了TGO的非均匀生长结果；且考虑氧化效应相对于不考虑氧化效应时的界面应力处于较高水平. 此外，探索了氧化效应大小对TGO生长的影响规律，发现氧化效应大则能促进TGO的不规则生长，氧化效应小则相反.
- 热障涂层 /
- 热生长氧化物 /
- 扩散-氧化模型 /
- 氧化效应
Abstract: A user element subroutine of ABAQUS was developed, based on the Fick’s law involving the oxidation effect and the constitutive relationship of the 2-phase material in the oxidation zones according to the Voigt model. With a 2D element model which was constructed to reflect the real interface morphology of the thermal barrier coatings, numerical analysis of the oxidation effect on the growth trend of thermal grown oxide (TGO) and the stresses along the top coat (TC)-TGO and the bond coat (BC)-TGO interfaces was made. The numerical results show that, without the oxidation effect only uniform growth of TGO is predicted, while with the oxidation effect non-uniform growth of TGO is achieved. The stresses along the TC-TGO and BC-TGO interfaces with the oxidation effect are at higher levels compared to those without the oxidation effect. Moreover, the greater the oxidation effect is, the more irregular the growth of TGO becomes.
- thermal barrier coating /
- thermal grown oxide /
- diffusion-oxidation reaction model /
- oxidation effect

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参考文献(20)

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