کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10629400 991063 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Consolidation and conversion of carbon powders into TiC by reactive chemical vapour infiltration
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Consolidation and conversion of carbon powders into TiC by reactive chemical vapour infiltration
چکیده انگلیسی
Ceramic samples were prepared using a hybrid process in which the ceramic powder route was combined with reactive chemical vapour infiltration, a new gas phase route. In this technique, a carbide growth occurs from the conversion of a carbon-bearing powder and slows down with increase in carbide thickness due to solid-state diffusion limitation. This self-limitation is expected to allow a self-regulation of the growth between the interior and the surface of the sample and thus a better homogeneity. The chosen carbide was TiC obtained by reacting H2 and TiCl4 with a carbon powder introduced by slurry impregnation in felts. At 950 °C, the carbide infiltration is homogeneous with depth but the powder is not consolidated, while at 1050 °C the better conversion rate of carbon into carbide allows the consolidation but the infiltration is limited to only about 250 μm. The consolidation depth can be improved with time-temperature steps between both temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 3, February 2016, Pages 481-488
نویسندگان
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