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

CHAI Yi-jun; LIN Chen; LI Yue-ming

doi:10.3879/j.issn.1000-0887.2015.04.008

Volume 36 Issue 4

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CHAI Yi-jun, LIN Chen, LI Yue-ming. Growth Trend of Thermal Grown Oxide in TBCs Under Chemical Oxidation Effect[J]. Applied Mathematics and Mechanics, 2015, 36(4): 404-413. doi: 10.3879/j.issn.1000-0887.2015.04.008

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

doi: 10.3879/j.issn.1000-0887.2015.04.008

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)

Received Date: 2014-09-24
Rev Recd Date: 2015-01-06
Publish Date: 2015-04-15

Abstract

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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References(20)

References

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