Effects of Carbon Fiber Architecture on the Microstructure and Mechanical Property of C/C-SiC Composites
Effects of Carbon Fiber Architecture on the Microstructure and Mechanical Property of C/C-SiC Composites
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DOI：
10.4028/www.scientific.net/msf.658.133
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发表时间：
2010-07
期刊：
影响因子：
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通讯作者：
Ji Ping Wang;Jianyong Lou;Zhuo Xu;Z. Jin;Guanhao Qiao
中科院分区：
文献类型：
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作者：
Ji Ping Wang;Jianyong Lou;Zhuo Xu;Z. Jin;Guanhao Qiao
采用两步法快速制备了C/C- sic复合材料。首先以汽化煤油为前驱体，采用热梯度化学蒸汽渗透法（CVI）将短段碳纤维毡（SC）和2D碳纤维毡（2D）分别在2h、3h、4h和5h致密化成C/C复合材料。然后将C/C复合材料浸渍，与熔融硅反应得到C/C- sic复合材料。结果表明：随着CVI时间的延长，两种C/C- sic复合材料的密度在2.28g/cm3 ~ 2.00g/cm3范围内减小；孔隙率增加1.3% ~ 7.5%；复合材料中β-SiC和未反应Si相的含量下降。在相同条件下制备的2D_C/C-SiC复合材料的抗弯强度远高于SC_C/C-SiC复合材料。
C/C-SiC composites were rapidly fabricated by a two-steps processing. Firstly a short-cut carbon fiber felt (SC) and a 2D carbon fiber felt (2D) were densified to C/C composites by a thermal gradient chemical vapor infiltration (CVI) method with vaporized kerosene as a precursor in 2h, 3h, 4h and 5h, respectively. Then the C/C composites were infiltrated and reacted with melting silicon to obtain C/C-SiC composites. The results show that, with increase of the CVI time, the densities of the two types of C/C-SiC composites decrease in the range of 2.28g/cm3 to 2.00g/cm3; their porosities increase ranging from 1.3% to 7.5%; the contents of the β-SiC and the unreacted Si phases in the composites decline. The flexural strength of the 2D_C/C-SiC composite is much higher than that of the SC_C/C-SiC composite when prepared in the same condition.