摘要
以碳纤维整体毡为预制体,采用化学气相渗透法(CVI)制备出低密度碳/碳复合材料,再分别采用液相硅渗透工艺(LSI)制备出密度为2.1g/cm3的碳/碳-碳化硅复合材料(C/C-SiC),及先驱体转化工艺(PIP)制备出密度为1.9g/cm3的C/C-SiC。对2种工艺制备的C/C-SiC力学性能进行了比较,结果表明:PIP工艺制备的C/C-SiC弯曲强度为287MPa,明显高于LSI工艺制备的弯曲强度155MPa。
The C/C composites of low density are fabricated by chemical vapor infiltration(CVI) with integral carbon felts with carbon fiber as prefab.On the basis of the low density C/C composites,the C/C-SiC composites with the density of 2.1g/cm3 are prepared by liquid silicon infiltration(LSI),and the C/C-SiC composites with the of density 1.9g/cm3 are prepared by precursor infiltration and pyrolysis(PIP).The result shows that bend strength of the C/C-SiC composites prepared by PIP is 287MPa,which is better than that of 155MPa of the composites prepared by LSI.
出处
《航空制造技术》
2009年第S1期118-121,共4页
Aeronautical Manufacturing Technology
