کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1473520 | 991048 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of C/SiC ceramics using a preceramic polycarbosilane synthesized via hydrosilylation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper deals with the preparation of C/SiC powders via the pyrolysis of a novel polycarbosilane, synthesized by hydrosilylation. The preceramic polymer structure was studied by 1H, 13C and 29Si NMR, and in situ dynamic IR analysis. A pyrolysis up to 1800 °C of this low molecular weight polymer led to β-SiC particles dispersed in a carbon matrix. The excess of free carbon was revealed by elemental analysis and High-Resolution TEM. The ceramization behavior was discussed thanks to TGA/DTA-MS, and XRD analyses. Thus, the crystallization was effective for pyrolysis temperatures above 1200 °C, and the ceramic yield reached a value of 62%. This present study highlights the potential of hydrosilylation to prepare C/SiC powders.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 12, September 2016, Pages 2913–2921
Journal: Journal of the European Ceramic Society - Volume 36, Issue 12, September 2016, Pages 2913–2921
نویسندگان
Fabien Bouzat, Alexandra-Raluca Graff, Romain Lucas, Sylvie Foucaud,