Investigation of stress field and failure mode of plasma sprayed Al2O3-13%TiO2 coatings under thermal shock

Y. Wang; W. Tian; Y. Yang; C. G. Li; L. Wang

doi:10.1016/j.msea.2009.03.041

Investigation of stress field and failure mode of plasma sprayed Al₂O₃-13%TiO₂ coatings under thermal shock

Y. Wang^*
, W. Tian
, Y. Yang
, C. G. Li
, L. Wang

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

The stress field and failure mode of plasma sprayed Al₂O₃-13%TiO₂ coatings under thermal shock were analyzed by experimental and numerical investigations in this paper. Two kinds of nanostructured coatings were derived from reconstituted nanostructured feedstocks and one kind of conventional coating was deposited with commercial fused and crushed feedstock. Testing results showed that the nanostructured coatings exhibited improved thermal shock resistance than the conventional coating. The failure modes of coatings predicted by numerical analysis had a good consistency with the experimental results. The effects of interface morphology and coating defects on thermal stresses were also discussed in this paper. The improved thermal shock resistance of nanostructured coatings was related to their pre-existing spherical pores, reduced cracks and microstructures.

Original language	English
Pages (from-to)	103-110
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	516
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2009.03.041
State	Published - 15 Aug 2009

Keywords

AlO-13%TiO coating
Finite element method
Plasma spray
Thermal shock

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10.1016/j.msea.2009.03.041

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title = "Investigation of stress field and failure mode of plasma sprayed Al2O3-13\%TiO2 coatings under thermal shock",

abstract = "The stress field and failure mode of plasma sprayed Al2O3-13\%TiO2 coatings under thermal shock were analyzed by experimental and numerical investigations in this paper. Two kinds of nanostructured coatings were derived from reconstituted nanostructured feedstocks and one kind of conventional coating was deposited with commercial fused and crushed feedstock. Testing results showed that the nanostructured coatings exhibited improved thermal shock resistance than the conventional coating. The failure modes of coatings predicted by numerical analysis had a good consistency with the experimental results. The effects of interface morphology and coating defects on thermal stresses were also discussed in this paper. The improved thermal shock resistance of nanostructured coatings was related to their pre-existing spherical pores, reduced cracks and microstructures.",

keywords = "AlO-13\%TiO coating, Finite element method, Plasma spray, Thermal shock",

author = "Y. Wang and W. Tian and Y. Yang and Li, \{C. G.\} and L. Wang",

year = "2009",

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doi = "10.1016/j.msea.2009.03.041",

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TY - JOUR

T1 - Investigation of stress field and failure mode of plasma sprayed Al2O3-13%TiO2 coatings under thermal shock

AU - Wang, Y.

AU - Tian, W.

AU - Yang, Y.

AU - Li, C. G.

AU - Wang, L.

PY - 2009/8/15

Y1 - 2009/8/15

N2 - The stress field and failure mode of plasma sprayed Al2O3-13%TiO2 coatings under thermal shock were analyzed by experimental and numerical investigations in this paper. Two kinds of nanostructured coatings were derived from reconstituted nanostructured feedstocks and one kind of conventional coating was deposited with commercial fused and crushed feedstock. Testing results showed that the nanostructured coatings exhibited improved thermal shock resistance than the conventional coating. The failure modes of coatings predicted by numerical analysis had a good consistency with the experimental results. The effects of interface morphology and coating defects on thermal stresses were also discussed in this paper. The improved thermal shock resistance of nanostructured coatings was related to their pre-existing spherical pores, reduced cracks and microstructures.

AB - The stress field and failure mode of plasma sprayed Al2O3-13%TiO2 coatings under thermal shock were analyzed by experimental and numerical investigations in this paper. Two kinds of nanostructured coatings were derived from reconstituted nanostructured feedstocks and one kind of conventional coating was deposited with commercial fused and crushed feedstock. Testing results showed that the nanostructured coatings exhibited improved thermal shock resistance than the conventional coating. The failure modes of coatings predicted by numerical analysis had a good consistency with the experimental results. The effects of interface morphology and coating defects on thermal stresses were also discussed in this paper. The improved thermal shock resistance of nanostructured coatings was related to their pre-existing spherical pores, reduced cracks and microstructures.

KW - AlO-13%TiO coating

KW - Finite element method

KW - Plasma spray

KW - Thermal shock

UR - https://www.scopus.com/pages/publications/67649795733

U2 - 10.1016/j.msea.2009.03.041

DO - 10.1016/j.msea.2009.03.041

M3 - 文章

AN - SCOPUS:67649795733

SN - 0921-5093

VL - 516

SP - 103

EP - 110

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2

ER -

Investigation of stress field and failure mode of plasma sprayed Al₂O₃-13%TiO₂ coatings under thermal shock

Abstract

Keywords

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