Effect of Catalyst on Densification of Carbon/carbon Composites by Impregnation
When coal—tar pitch is used as a matrix precursor of carbon/carbon (C/C) composites, improving carbonization yield and decreasing the closed porosity are key factors. In this paper, the C/C composites fabricated from activated preforms by solution of nickel nitrate and parent preforms were compared by apparent densities and microstructures from experiments. The results show that the nickel reduced from nickel nitrate during carbonization of composite can leads to (1) the higher densification efficiency, (2) the more ordered and denser structure of matrix, (3) the well-bonded interface between reinforcing carbon fibers and matrix, (4) the lower amount of closed porosity.
Carbon/carbon composites Catalyst Microstructure
SONG Faju LI Tiehu REN Chengqiang WANG Dawei
School of Materials Science and Engineering, Northwestern Polytechnical University, Xian 710072, P. R. China
国际会议
上海
英文
476-478
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）