عنوان انگلیسی: ZrB2/SiC as a protective coating for C/SiC composites: Effect of high temperature oxidation on mechanical properties and anti-ablation property
سال نشر: ۲۰۱۳
نویسنده: Xiang Yang,Li Wei,Wang Song,Zhang Bi-feng,Chen Zhao-hui
تعداد صفحه فارسی: ۱۵ – تعداد صفحه انگلیسی: ۶
دانشگاه: Science and Technology on Advanced Ceramic Fibers and Composites, College of Aerospace and Materials Engineering, National University of Defense Technology, Changsha 410073, People’s Republic of China
نشریه: Process Safety and Environmental Protection
کیفیت ترجمه: ترجمه پلاس
چکیده
کامپوزیت های C / SiC به عنوان محافظ حرارتی برای کاربردهای هوا فضا توجه زیادی دارند ، مشروط بر اینکه با پوشش های مناسب در برابر اکسیداسیون محافظت شوند. در مقابل، سرامیک‌های دمای بسیار بالا و به ویژه ZrB۲، در میان بهترین مواد مقاوم در برابر اکسیداسیون شناخته شده‌اند. نوع جدیدی از پوشش محافظ اکسیداسیون (پوشش ZrB۲ / SiC ) بر روی کامپوزیت
Abstract
C/SiC composites are raising great interest as a thermal shielding for aerospace applications, provided that they are protected from oxidation by suitable coatings. Conversely, ultra high temperature ceramics, and in particular ZrB2, is among the best oxidation resistant materials as known. A new type of oxidation protective coating (ZrB2/SiC coating) was produced on C/SiC composites. The composites were produced by precursor infiltration and pyrolysis (PIP), which is a simple and low cost method; the coating was ZrB2 mixed with SiC, which was fabricated by painting slurry on the surface of the composite followed by chemical vapor deposition (CVD) SiC on the top. Mechanical tests were conducted before and after oxidation test. Anti-ablation property was tested under oxy-acetylene torch. Oxidation test shows that the uncoated samples are oxidized quickly and the weight loss reaches 29.2% and the reservation of original flexural strength is only 6.74%, while the weight loss of ZrB2/SiC c
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