کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1473356 991038 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Compressive deformation of liquid phase-sintered porous silicon carbide ceramics
ترجمه فارسی عنوان
تغییر شکل فشرده سرامیک کاربید سیلیس متخلخل مایع فاز مایع
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی


• Compressive strength of porous SiC increased with decreasing specific surface area.
• Porous SiC was fractured by shear deformation under the compressive test.
• Strength of the grain boundary of porous SiC was far weaker than that of Al2O3.

Porous silicon carbide ceramics were fabricated by liquid phase sintering with 1 wt% Al2O3–1 wt% Y2O3 additives during hot-pressing at 1400–1900 °C. The longitudinal strain at compressive fracture increased at a higher porosity and was larger than the lateral strain. The compressive Young's modulus and the strain at fracture depended on the measured direction, and increased with the decreased specific surface area due to the formation of grain boundary. However, the compressive strength and the fracture energy were not sensitive to the measured direction. The compressive strength of a porous SiC compact increased with increasing grain boundary area. According to the theoretical modeling of the strength–grain boundary area relation, it is interpreted that the grain boundary of a porous SiC compact is fractured by shear deformation rather than by compressive deformation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asian Ceramic Societies - Volume 2, Issue 4, December 2014, Pages 422–428
نویسندگان
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