کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7899197 1510142 2013 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of substrate curvature on residual stresses and failure modes of an air plasma sprayed thermal barrier coating system
ترجمه فارسی عنوان
اثر انحنای سوبسترا بر تنش های باقی مانده و حالت های شکست یک سیستم پوشش محافظ حرارتی پاشش پلاسما هوا
کلمات کلیدی
پلاسمای هوا پاشی پوشش حرارتی حرارتی، انحنای بستر، استرسهای باقی مانده، حالت های شکست مواجهه،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
A set of aerofoil shaped air plasma sprayed thermal barrier coated (APS-TBC) specimens were adopted in this paper to investigate the stress distributions in the ceramic top coat (TC) and the thermally grown oxide (TGO), the mechanism of local crack generation and propagation at the TC/BC (bond coat) interface. The failure mode of the TBC system, the distribution of asperities at TC/BC interface, thickness of the TC and BC, and the TC microstructure were found to be influenced by substrate curvature. Residual stress was therefore measured across the thickness of the TC, along the undulating TGO and mapped at locations of asperities where failure tended to occur to interpret the initiation of local failure. The role of the TGO was investigated via its chemical bonding with the TC and the decohesion occurring at the TGO/BC interface. The crack propagation at the interface has been discussed with respect to the macro-failure of the TBC system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 33, Issues 15–16, December 2013, Pages 3345-3357
نویسندگان
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