کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7967153 | 1514191 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermophysical characterisation of ZrCxNy ceramics fabricated via carbothermic reduction-nitridation
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Thermophysical properties of ZrCxNy ceramics prepared from powders produced via a two-step carbothermic reduction-nitridation of zirconia were characterised to 2200 K. Preliminary evidence for the mechanism of nitridation shows a gas-solid phase reaction at the ZrC particle surface which is the first such observation with this system. Electrical and thermal conductivities were higher than commercially available ZrC and ZrN. Thermal conductivity values of the ZrCxNy phases at room temperature were between 35 and 43 Wmâ1 Kâ1, increasing with nitrogen content due to increased electronic contribution to thermal conduction and increased to 40-50 Wmâ1 Kâ1 with temperature. Electrical conductivity also increased with nitrogen content and values were in the range of 100-450 Ã 104Ω-1 m1, but decreased with increasing temperature showing metallic behaviour.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 454, Issues 1â3, November 2014, Pages 46-53
Journal: Journal of Nuclear Materials - Volume 454, Issues 1â3, November 2014, Pages 46-53
نویسندگان
R. Harrison, O. Ridd, D.D. Jayaseelan, W.E. Lee,