Performance of thermal barrier coatings in high heat flux environments

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41646

Title: Performance of thermal barrier coatings in high heat flux environments
Author(s): Miller, Robert A.; Berndt, Christopher C.
Abstract: Thermal barrier coatings were exposed to the high temperature and high heat flux produced by a 30 kw plasma torch. Analysis of the specimen heating rates indicates that the temperature drop across the thickness of the 0. 038 cm ceramic layer was about 1100 degree C after 0. 5 s in the flame. An as-sprayed ZrO//2-8wt%Y//2O//3 specimen survived 3000 of the 0. 5 s cycles without failing. A coated specimen with no surface modification but which was heat treated in argon also did not surface spall. Heat treatment in air led to spalling in as early as one cycle from heating stresses. Failures at edges were investigated and shown to be a minor source of concern.
Publication type: Journal article
Source: Thin Solid Films, Vol. 119, no. 2 (Sep 1984), pp. 195-202
Publication year: 1984
Keyword(s): Protective coatings; Refractory materials; Surface spalling; TBCs; Thermal barriers; Thermal insulation; Yttria; Zirconia
Publisher: Elsevier
ISSN: 0040-6090
Publisher URL: http://dx.doi.org/10.1016/0040-6090(84)90534-0
Peer reviewed