کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1661231 1008420 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal fracture resistance of a functionally graded coating with periodic edge cracks
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Thermal fracture resistance of a functionally graded coating with periodic edge cracks
چکیده انگلیسی

This work investigates the thermal fracture resistance of a functionally graded coating with an array of periodic edge cracks. The integral equation method is used to analyze the thermal stress intensity factors (TSIFs) at the crack tips and the critical thermal shocks that cause crack initiation. The effects of crack density (crack spacing) and thermal property gradients on the critical thermal shocks and TSIFs are examined using an Al2O3/Si3N4 graded coating on a Si3N4 substrate. Numerical results show that for a given crack density, the graded Al2O3/Si3N4 coating exhibits higher critical thermal shocks than the homogeneous Al2O3 coating, and hence higher thermal fracture resistance. For a given material gradation profile, a higher crack density (smaller crack spacing) enhances the critical thermal shock significantly.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 202, Issue 17, 25 May 2008, Pages 4189–4197
نویسندگان
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