کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1585104 1514909 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal shock residual strength of functionally graded ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Thermal shock residual strength of functionally graded ceramics
چکیده انگلیسی

When subjected to severe thermal shocks functionally graded ceramics (FGCs) suffer strength degradation due to microcrack growth, coalescence and macrocrack propagation induced by the shocks. This paper presents a thermo-fracture mechanics model to study the residual strength behavior of thermally shocked FGCs. It is assumed that thermal shock damage mainly results from the extension of a pre-existing edge crack initially located at the thermally shocked surface of an FGC specimen. Thermal shock threshold, or the critical thermal shock that causes precipitous strength drop, is determined. The paper describes applications of the model to calculate the thermal shock residual strength of FGCs as a function of thermal shock severity. Two FGC systems, i.e., Al2O3/Si3N4 and TiC/SiC FGCs are considered in the numerical studies. The numerical results show that material gradation profile has a pronounced effect on the thermal shock threshold and the thermal shock residual strength of FGCs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 435–436, 5 November 2006, Pages 71–77
نویسندگان
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