کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476611 991157 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reaction of TiC with SiCl4 vapor with formation of SiC–TiC composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Reaction of TiC with SiCl4 vapor with formation of SiC–TiC composites
چکیده انگلیسی

The reaction of TiC grains with SiCl4 vapor was carried out in Ar at 1000–1600 °C to produce TiC–SiC composite powders. The compositions of these powders were controlled by controlling the conversion to SiC, which depends on the reaction temperature. The phases formed by the solid–gas reaction were identified by X-ray analysis (XRD) and the molar ratio of SiC to TiC in the powder was estimated from the area ratios of the respective XRD peaks. The reaction begins at about 1100 °C and its rate increases with temperature to 1600 °C, at which 92% SiC is formed. The morphology of the TiC–SiC composites was observed by scanning electron microscopy and transmission electron microscopy and a reaction mechanism is deduced from the above results and thermodynamic considerations. TiC–SiC composites were densified by spark plasma sintering at 1750 °C and 40 MPa to the relative density 92–96% and a Vickers hardness of 1700–1900 Hv.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 29, Issue 11, August 2009, Pages 2403–2409
نویسندگان
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