Design of functionally graded thermal barrier coatings based on a nonlinear micromechanical approach

Tsukamoto, Hideaki (2010) Design of functionally graded thermal barrier coatings based on a nonlinear micromechanical approach. Computational Materials Science, 50 2: 429-436. doi:10.1016/j.commatsci.2010.08.035


Author Tsukamoto, Hideaki
Title Design of functionally graded thermal barrier coatings based on a nonlinear micromechanical approach
Journal name Computational Materials Science   Check publisher's open access policy
ISSN 0927-0256
Publication date 2010-12
Sub-type Article (original research)
DOI 10.1016/j.commatsci.2010.08.035
Volume 50
Issue 2
Start page 429
End page 436
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2011
Language eng
Formatted abstract
This study presents the methodology of analysis and design of functionally graded thermal barrier coatings
(FG TBCs) consisting of ceramics and metals based on a mean-field micromechanical approach taking
into account the time-independent and dependent inelastic deformation, such as plasticity of metals,
creep of metals and ceramics, and diffusional mass flow at the ceramic/metal interface. Ni–ZrO2 systems
were numerically studied and the effect of the compositional gradation patterns and time-dependent
inelastic deformation on the micro- and macro-stress states in the FG TBCs were examined. The suitable
compositional gradation patterns were proposed for typical thermo-mechanical boundary conditions. It
was shown that the creep deformation near the ceramic surface can introduce large tensile stresses,
potentially leading to thermal fracture, which is possibly reduced by controlling the ability of creep of
the ceramics.
2010 Elsevier B.V. All rights reserved.
Keyword Functionally graded thermal barrier coating
Stress relaxation
Creep
Interface diffusion
Mean-field micromechanics
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2011 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 20 Feb 2011, 00:05:03 EST