共搜索到5537条信息，每页显示10条信息，共554页。用时：0小时0分0秒390毫秒
is an essential step in the preparation of SiC fibers and the properties of SiC fibers are affected greatly by curing conditions. TG measurement performed in air shows that mass gain starts at approximately... is calculated as 3.07×106. The kinetics model was obtained and the experimental data of PCS fibers show good agreement with the kinetics model. Key words: polycarbosilane; SiC fibers; thermal stability; curing......
Effect of properties of SiC fibers on longitudinal tensile behavior of SiCf/Ti-6Al-4V composites LI Jian-kang(李建康), YANG Yan-qing(杨延清), YUAN Mei-ni(原梅妮), LUO Xian(罗 贤), LI Li-li(李丽丽) School...; Abstract: Three types of SiC fibers with different tensile strength were......
......
......
A review of third generation SiC fibers and SiC_f/SiC compositesPengren Wang,Fengqi Liu,Hao Wang,Hao Li,Yanzi GouCollege of Aerospace Science and Engineering, National University of Defense Technology摘 要:Compared with the first and second generations SiC fibers, the third generation SiC fibers have obvious improvement in heat-resistance, oxidation......
and Si-Al-C-O fibers mentioned above play an important role in inhibition of crystalline grain of β-SiC at very high temperature and thus improve the high temperature resistance. It was reported that materials made from silicon carbide fibers containing Ti or Zr exhibited a reflection attenuation of 40 dB at 10 GHz and may be applied as electromagnetic wave absorbing materials[3]. In addition, SiC......
the ordered deposition of pyrocarbon and adjust the interface bonding between pyrocarbon and carbon fibers during the infiltration.Key words:carbon nanofiber; SiC nanofiber; pyrocarbon; interface...Effect of nanofibers at surface of carbon fibers on microstructure of carbon/carbon composites during chemical vapor infiltrationXIAO Peng(肖鹏), CHEN Jie(陈洁), XU Xian-feng(徐先锋), LU Xue-feng(卢雪峰......
SiC涂层C/C复合材料应力氧化失效行为 肖 鹏1,黄 辉1,栾新刚2,刘持栋2 (1. 中南大学 粉末冶金国家重点实验室,湖南 长沙,410083； 2. 西北工业大学 超高温结构复合材料国防科技重点实验室,陕西 西安,710072) 摘 要:在氧化性气氛(21% O2+79% Ar),不同拉应力下研究SiC涂层C/C复合材料在1 000 ℃和1 300 ℃的氧化失效行为；采用扫描电镜观察SiC涂层C/C复合材料氧化失效后的断口形貌.试验结果表明:当温度为1 000 ℃,拉应力由C/C复合材料拉伸强度的20%增加至50%时,SiC涂层C/C复合材料的应力氧化明显加剧,寿命由大于5.00 h缩短到2.92 h,应力对SiC涂层C/C复合材料的寿命有显著影响；当拉应力为C/C复合材料拉伸强度的50%,温度为1 000 ℃和1 300 ℃时,材料均......
of Defence Technology, Changsha 410073, China) Abstract: Continuous SiC(OAl) fibers, named KD-A fibers, were prepared by the melt-spinning of ceramic precursor polyaluminocarbosilane, air-curing, and pyrolizing at 1300℃. These fibers contained small amount of aluminum and 7%-9% oxygen. The KD-A fibers were converted into sintered SiC(Al) fibers, named KD-SA, by sintering at 1800℃. The fibers were......
Trans. Nonferrous Met. Soc. China 22(2012) 1133-1139 Effect of composition and structure on specific resistivity of SiC fibers WANG De-yin, SONG Yong-cai, LI Yong-qiang State Key Laboratory of Novel Ceramic Fibers and Composites, National University of Defense Technology, Changsha 410073, China Received 13 May 2011; accepted 5 March 2012 Abstract: Four kinds of SiC fibers with different specific......
