Preparation and Properties of SiC Fibers Containing Yttrium and Aluminum

摘要：

　　SiC fibers containing Y and Al were prepared by sintering the amorphous KD-Y fibers at different temperatures from 1200 to 1800 ℃.The tensile strength of fibers increases when the sintering temperature increases from 1200 to 1400 ℃ due to the dispersion strengthening of β-SiC microcrystal and decreases to the lowest point when being sintered at 1600 ℃,then rose again with the further increase of temperature to 1800 ℃.The tensile strength reached to 2.15 GPa.The oxygen content of KD-Y fibers determined the properties of the sintered SiC fibers and sintering process.Through chemical vapor curing (CVC),the oxygen content was controlled below 7.0 wt% and the tensile strength of KD-Y fibers reached to 3.08 GPa.Further-more,the sintering process of KD-Y fibers was discussed and the grain size of β-SiC grew up with the heat treatment temperature.

关键词： Silicon carbide Fibers Sintering Super high-temperature resistance

作者: Daxiang Yang Yongcai Song

作者单位: Key Lab of New Ceramic Fibers and Composites,School of Aerospace and Materials Engineering,National University of Defense Technology,Changsha 410073,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 827-830

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）