以聚硅氧烷为先驱体,采用先驱体转化法制备SiCf/Si-O-C复合材料,同时测试所得复合材料的弯曲强度、韧性、剪切强度、密度、热膨胀系数、导热系数、耐烧蚀性能。结果表明,SiCf/Si-O—C复合材料具有良好的综合性能。对所得材料微观结构进行分析讨论,发现界面结构与致密度是SiCf/Si-O-C复合材料具有高性能的主要原因。
Abstract
Silicon carbide fiber reinforced siliconoxycarbide(Si-O-C) composites were fabricated via precursor infiltration and pyrolysis using polysiloxane.Flexural strength, tensile strengths, shear strength, dentsity, thermal expansion coefficient, thermal conduction coefficient, ablative properties of SiCf/Si-O-C composites were tested .The results indicated that SiCf/Si-O-C composites had fairly excellent properties.Microstructure and properties of SiCf/Si-O-C composites was discussed, the high properties were mainly attributed to ideal interface structure and density.
关键词
Si-O-C /
聚硅氧烷 /
先驱体转化 /
陶瓷基复合材料 /
烧蚀性能
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Key words
silicon oxycarbide /
polysiloxane /
precursor infiltrati /
ceramic matrix compo /
ablative property
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参考文献
徐永东,成来飞,张立同.三维碳化硅/碳化硅陶瓷基编织体复合材料[J].无机材料学报,2001,2(16):344-348.
SCHOLZ R,DOS SANTOS MARQUES.Electrical conductivity of silicon carbide composite and fibers[J].Journal of Nuclears,2002,307-311:1098-1101.
MIRIYALA N,LIAW P K.The mechanical behavior of a Nicalon/SiC composite at room temperature and 1000℃[J].Journal of Nuclears,1998,253:1-9.
MA Qing-song,CHEN Zhao-hui.Processing and characterization of three-dimensional carbon fiber reinforced Si-O-C composite via precursor pyrolysis[J].Material Science and Engineering,2003,A352:213-216.
马青松,陈朝辉.聚硅氧烷/二乙烯基苯的交联与裂解[J].国防科技大学学报,2001,23(5):40-44.
LEE S P,PARK J S.Process,microstructure and flexural propertises of reaction sintered Tyranno SA/SiC composites[J].Journal of Nuclear Materials,2002,307-311:1191-1195.
YASMIN A,BOWEN P.Fatigue behavior of cross-ply Nicalon/CAS-Ⅱ glass-ceramic matrix composites at room and elevated temperatures[J].Composites:Part A,2004,35:83-94.
RICE R W.Effects of amount,location,and character of porosity on stiffness and strength of ceramic fiber composites via different processing[J].Journal Materials Science,1999,34(12):2769-2772.
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脚注
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