کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1492391 | 992379 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cost effective combustion synthesis of silicon nitride
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
The feasibility of mechanical activation (MA)-assisted combustion synthesis (CS) of Si3N4 was demonstrated by using Si/NH4Cl as reactants under a nitrogen pressure of 2 MPa. MA treatment significantly enhances the reactivity of Si powders, which effectively promotes the nitridation of silicon. The NH4Cl had the same effect as Si3N4 diluent in preventing extensive melting of Si within the combustion wave zone. Full nitridation of Si was achieved at diluent levels as low as 5 wt%. Si3N4 powders with α-phase contents of up to 90.6 wt% were obtained. The temperature gradient induced by heat release through radiation was responsible for discrepancies in the phase composition and morphologies of the as-synthesized product at different locations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 43, Issue 6, 3 June 2008, Pages 1598–1606
Journal: Materials Research Bulletin - Volume 43, Issue 6, 3 June 2008, Pages 1598–1606
نویسندگان
Yi-Xiang Chen, Jiang-Tao Li, Ji-Sheng Du,