Failure mechanisms of thermal barrier coatings at high temperature

Xi CHEN

doi:10.1115/IMECE2003-43161

Failure mechanisms of thermal barrier coatings at high temperature

Research output: Book Chapters | Papers in Conference Proceedings › Conference paper (refereed) › Referred Conference Paper › peer-review

2 Citations (Scopus)

Abstract

Thermal barrier coatings (TBCs) are widely used in turbine engines. They are regarded as one of the most successful innovations and applications of coatings in industry. Thermal barrier system comprise thermally insulating materials having sufficient thickness and durability that they can sustain an appreciable temperature difference between the load bearing alloy and the coating surface. TBC exhibit multiple failure modes. Among them, the Foreign Object Damage (FOD) and mechanical erosion are the most prevalent failure modes of TBC at high temperature. In this study, based on a new scaling analysis of impact mechanics, FOD and erosion of TBCs are analyzed by using the finite element method. Impact and material variables are grouped into the smallest possible parameter set to provide explicit results. Microstructural effects are factored into the approach. Three different domains have been explored governed by particle size, velocity, temperature and TBC composition. Numerical simulations show that crack initiation is activated by transient stresses and delamination is governed by residual stresses. The transient stresses occurring near the free surface lead to crack initiation and material removal. Failure criterions are derived which provide useful insights on how to improve FOD and erosion resistances.

Original language	English
Title of host publication	Proceedings of the ASME Materials Division 2003 : presented at the 2003 ASME International Mechanical Engineering Congress & Exposition : November 15-21, 2003, Washington, D.C.
Publisher	The American Society of Mechanical Engineers(ASME)
Pages	159-167
Number of pages	9
ISBN (Print)	9780791837191
DOIs	https://doi.org/10.1115/IMECE2003-43161
Publication status	Published - 2003
Externally published	Yes
Event	ASME 2003 International Mechanical Engineering Congress and Exposition - Washington, United States Duration: 15 Nov 2003 → 21 Nov 2003

Congress

Congress	ASME 2003 International Mechanical Engineering Congress and Exposition
Abbreviated title	ASME 2003
Country/Territory	United States
City	Washington
Period	15/11/03 → 21/11/03

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CHEN, X. (2003). Failure mechanisms of thermal barrier coatings at high temperature. In Proceedings of the ASME Materials Division 2003 : presented at the 2003 ASME International Mechanical Engineering Congress & Exposition : November 15-21, 2003, Washington, D.C. (pp. 159-167). Article 43161 The American Society of Mechanical Engineers(ASME). https://doi.org/10.1115/IMECE2003-43161

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abstract = "Thermal barrier coatings (TBCs) are widely used in turbine engines. They are regarded as one of the most successful innovations and applications of coatings in industry. Thermal barrier system comprise thermally insulating materials having sufficient thickness and durability that they can sustain an appreciable temperature difference between the load bearing alloy and the coating surface. TBC exhibit multiple failure modes. Among them, the Foreign Object Damage (FOD) and mechanical erosion are the most prevalent failure modes of TBC at high temperature. In this study, based on a new scaling analysis of impact mechanics, FOD and erosion of TBCs are analyzed by using the finite element method. Impact and material variables are grouped into the smallest possible parameter set to provide explicit results. Microstructural effects are factored into the approach. Three different domains have been explored governed by particle size, velocity, temperature and TBC composition. Numerical simulations show that crack initiation is activated by transient stresses and delamination is governed by residual stresses. The transient stresses occurring near the free surface lead to crack initiation and material removal. Failure criterions are derived which provide useful insights on how to improve FOD and erosion resistances.",

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year = "2003",

doi = "10.1115/IMECE2003-43161",

language = "English",

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address = "United States",

note = "ASME 2003 International Mechanical Engineering Congress and Exposition, ASME 2003 ; Conference date: 15-11-2003 Through 21-11-2003",

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CHEN, X 2003, Failure mechanisms of thermal barrier coatings at high temperature. in Proceedings of the ASME Materials Division 2003 : presented at the 2003 ASME International Mechanical Engineering Congress & Exposition : November 15-21, 2003, Washington, D.C.., 43161, The American Society of Mechanical Engineers(ASME), pp. 159-167, ASME 2003 International Mechanical Engineering Congress and Exposition, Washington, District of Columbia, United States, 15/11/03. https://doi.org/10.1115/IMECE2003-43161

Failure mechanisms of thermal barrier coatings at high temperature. / CHEN, Xi.
Proceedings of the ASME Materials Division 2003 : presented at the 2003 ASME International Mechanical Engineering Congress & Exposition : November 15-21, 2003, Washington, D.C.. The American Society of Mechanical Engineers(ASME), 2003. p. 159-167 43161.

Research output: Book Chapters | Papers in Conference Proceedings › Conference paper (refereed) › Referred Conference Paper › peer-review

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BT - Proceedings of the ASME Materials Division 2003 : presented at the 2003 ASME International Mechanical Engineering Congress & Exposition : November 15-21, 2003, Washington, D.C.

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Failure mechanisms of thermal barrier coatings at high temperature

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