کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475524 1510143 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new approach for the net-shape fabrication of porous Si3N4 bonded SiC ceramics with high strength
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
A new approach for the net-shape fabrication of porous Si3N4 bonded SiC ceramics with high strength
چکیده انگلیسی

In this study, Si3N4 bonded porous SiC ceramics with high strength had been net-shapely fabricated by a new approach. In this approach, we proposed a two-step processing route composed of freeze casting and carbothermal reduction reactions in which carbon aerogels, derived from sol infiltration and pyrolysis, involved. The phase components, microstructures and properties of the prepared ceramics were investigated. The results showed that carbon aerogels with high apparent surface area had been completely reacted and new SiC and Si3N4 grains had been produced. The porous ceramics with flexural strength of 164.3 MPa at 33% porosity and 80.5 MPa at 46% porosity were obtained, whose linear shrinkages were only 1.06% and 1.94% during the whole processing respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 33, Issues 13–14, November 2013, Pages 2421–2427
نویسندگان
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