کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475522 1510143 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation on the indentation hardness of precursor derived Si–B–C–N ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Experimental investigation on the indentation hardness of precursor derived Si–B–C–N ceramics
چکیده انگلیسی

The elasto-plastic response of the precursor derived Si–B–C–N ceramics upon contact loading was determined by depth sensing nanoindentation technique. The indentation response of as-thermolyzed Si–B–C–N ceramic was compared with the heat-treated counterpart. The as-thermolyzed ceramic was X-ray amorphous and the heat-treated ceramic was phase separated and crystallized. The hardness and reduced elastic modulus values of the as-thermolyzed ceramic were ∼16 GPa and ∼172 GPa, respectively. The reduction in hardness to ∼9 GPa in the heat-treated ceramic was attributed to phase separation and crystallization of SiC and Si3N4. Furthermore, high elastic recovery with a plastic work ratio of ∼0.3 was observed and ascribed to volume controlled deformation mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 33, Issues 13–14, November 2013, Pages 2399–2405
نویسندگان
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