کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1473938 991070 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal shock resistance of air plasma sprayed thermal barrier coatings
ترجمه فارسی عنوان
مقاومت در برابر شوک حرارتی پوشش های حرارتی پاشش هوا
کلمات کلیدی
پوشش های مانع حرارتی، پختن لایه لایه شدگی، شکستگی، پوشش پاشش پلاسما هوا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

The spallation resistance of an air plasma sprayed (APS) thermal barrier coating (TBC) to cool-down/reheat is evaluated for a pre-existing delamination crack. The delamination emanates from a vertical crack through the coating and resides at the interface between coating and underlying thermally grown oxide layer (TGO). The coating progressively sinters during engine operation, and this leads to a depth-dependent increase in modulus. Following high temperature exposure, the coating is subjected to a cooling/reheating cycle representative of engine shut-down and start-up. The interfacial stress intensity factors are calculated for the delamination crack over this thermal cycle and are compared with the mode-dependent fracture toughness of the interface between sintered APS and TGO. The study reveals the role played by microstructural evolution during sintering in dictating the spallation life of the thermal barrier coating, and also describes a test method for the measurement of delamination toughness of a thin coating.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 34, Issue 11, September 2014, Pages 2687–2694
نویسندگان
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