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Lifetime Assessment for Thermal Barrier Coatings: Tests for Measuring Mixed Mode Delamination Toughness: Lifetime Assessment for Thermal Barrier Coatings

Hutchinson, Robert G. ; Hutchinson, John W.

Journal of the American Ceramic Society, 06/2011, Vol.94, supplement s1, pp.s85-s95 [Tạp chí có phản biện]

DOI: http://dx.doi.org/10.1111/j.1551-2916.2011.04499.x

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  • Nhan đề:
    Lifetime Assessment for Thermal Barrier Coatings: Tests for Measuring Mixed Mode Delamination Toughness: Lifetime Assessment for Thermal Barrier Coatings
  • Tác giả: Hutchinson, Robert G. ; Hutchinson, John W.
  • Chủ đề: Thermal Barrier Coatings ; Durability ; Lifetime Assessment ; Interface Toughness ; Delamination Toughness ; Mode Ii Delamination Toughness
  • Là 1 phần của: Journal of the American Ceramic Society, 06/2011, Vol.94, supplement s1, pp.s85-s95
  • Mô tả: Mechanisms leading to degradation of the adherence of thermal barrier coatings (TBC) used in aircraft and power generating turbines are numerous and complex. To date, robust methods for the lifetime assessment of coatings have not emerged based on predictions of the degradation processes due to their complexity. In the absence of mechanism-based predictive models, direct measurement of coating adherence as a function of thermal exposure must be a component of any practical approach toward lifetime assessment. This paper outlines an approach to lifetime assessment of TBC that has taken shape in the past few years. Most TBC delaminations occur under a mix of mode I and mode II cracking conditions, with mode II delamination being particularly relevant. Direct measurement of TBC delamination toughness has been challenging, but recent progress has made this feasible. This paper surveys a range of potentially promising tests for measuring the mode dependence of delamination toughness with particular emphasis on toughness under mode II conditions.
  • Ngôn ngữ: English
  • Số nhận dạng: DOI: http://dx.doi.org/10.1111/j.1551-2916.2011.04499.x

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