کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10629276 991051 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of wound SiCBNx/SiNx/SiC with near stoichiometric SiC matrix via LSI process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Development of wound SiCBNx/SiNx/SiC with near stoichiometric SiC matrix via LSI process
چکیده انگلیسی
In order to develop SiC/SiC ceramic matrix composites with a low porosity, liquid silicon infiltration (LSI) was chosen as a technique, characterized by short processing times. To create the matrix, a tailored phenolic resin containing ß-naphthol units was synthesized and infiltrated in wound fiber preforms, thermally cured, pyrolysed and siliconized. The aim is to obtain a high carbon yield during pyrolysis and to create a dense carbon foam between the SiC fibers. Instead of a classic liquid silicon infiltration via capillary forces through a carbon block-like microstructure, this foam promotes a softer infiltration with less fiber degradation and a maximized carbon conversion to near stoichiometric SiC. To protect the SiC fibers from an attack of the liquid silicon and to simultaneously provide a weak fiber matrix bonding, a BNx/SiNx fiber coating was chosen. The coating was applied by means of low-pressure chemical vapor deposition (LPCVD) using gaseous chlorine free precursors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 7, June 2016, Pages 1571-1580
نویسندگان
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