کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1475522 | 1510143 | 2013 | 7 صفحه PDF | دانلود رایگان |

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.
Journal: Journal of the European Ceramic Society - Volume 33, Issues 13–14, November 2013, Pages 2399–2405