کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898380 | 1510135 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Substrate-constrained effect on the stiffening behavior of lamellar thermal barrier coatings
ترجمه فارسی عنوان
اثر محدود شده بر روی رفتار سخت افزاری پوششهای حرارتی لامالر
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کلمات کلیدی
محدودیت بستر، درمان با محدودیت سخت شدن پوشش های مانع حرارتی، تکامل ساختاری،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Thermal exposure would compromises the compliance and thermal insulating performance of thermal barrier coatings (TBCs). However, most publications were based on free-standing coatings in which the stress resulting from substrate is essentially different from TBCs on superalloy substrate. In this paper, the constrained effect of substrate on the ceramic top-coat of plasma sprayed lamellar TBCs was investigated. Results showed that the structural changes evolve from micro-scale to macro-scale during thermal exposure. In a relatively shorter thermal exposure stage, the inter-splat pores became narrowed, whereas the intra-splat cracks became widened. Consequently, the healing kinetics of inter-splat pores was much faster than that of the intra-splat cracks. In a relatively longer thermal exposure stage, some macroscale cracks appeared in coating surface owing to the gradually stiffening coatings. As a result, the microscale intra-splat cracks near the macroscale cracks were healed rapidly. In brief, the substrate constraint induced structural changes were stage sensitive.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 6, June 2018, Pages 2579-2587
Journal: Journal of the European Ceramic Society - Volume 38, Issue 6, June 2018, Pages 2579-2587
نویسندگان
Guang-Rong Li, Juan Lei, Guan-Jun Yang, Cheng-Xin Li, Chang-Jiu Li,