摘要
以聚碳硅烷(PCS)/二乙烯基苯(DVB)为先驱体制备了3D-B Cf/S iC复合材料,研究了不同浸渍工艺对材料力学性能的影响。结果表明:采用加热加压浸渍可以大大提高先驱体的浸渍效率,提高所制备材料的密度,从而明显提高Cf/S iC复合材料的力学性能。选用加热加压浸渍条件所制备的材料密度达到1.944 g/cm3,室温弯曲强度达到662MPa,在1650℃(真空)和1800℃(真空)下测试,材料的弯曲强度分别为647MPa和609MPa。
Three-dimensional carbon fibres reinforced SiC composites （3D-B C r/SiC） were fabricated via infiltration and pyrolysis of polycarbosilane（ PCS）/divinylbenzene （DVB）. The effects of infiltration processes on the microstrueture and mechanical properties of the Cf/SiC composites were investigated. The results showed that comparison with the vacuum infiltration, heating and pressure infiltration could improve the infiltration efficiency and density so that the Cf/SiC composites exhibited higher flexural strength, reached 662MPa at room temperature. Furthermore, when tested at 1650℃ and 1800℃ in vacuum ,the flexural strengths of the samples were 647MPa and 609MPa respectively.
出处
《航空材料学报》
EI
CAS
CSCD
2005年第5期38-41,共4页
Journal of Aeronautical Materials
