کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1474269 991084 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Micromechanics modeling of creep fracture of zirconium diboride–silicon carbide composites at 1400–1700 °C
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Micromechanics modeling of creep fracture of zirconium diboride–silicon carbide composites at 1400–1700 °C
چکیده انگلیسی

The creep deformation of the ultra-high temperature ceramic composite ZrB2–20%SiC at temperatures from 1400 to 1700 °C was studied by a micromechanical mode in which the real microstructure was adopted in finite element simulations. Based on the experiment results of the change of activation energy with respect to the temperature, a mechanism shift from diffusional creep-control for temperatures below 1500 °C to grain boundary sliding-control for temperatures above 1500 °C was concluded from simulations. Also, the simulation results revealed the accommodation of grain rotation and grain boundary sliding by grain boundary cavitation for creep at temperatures above 1500 °C which was in agreement with experimental observations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 34, Issue 16, December 2014, Pages 4145–4155
نویسندگان
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