摘要
以炭纤维无纬布/网胎针刺整体毡为增强体,采用化学气相浸渗(CVI)法制备不同密度的炭/炭(C/C)多孔体,并进一步加压浸渗铜合金制备炭/炭-铜(C/C-Cu)复合材料,研究C/C多孔体密度对C/C-Cu复合材料压缩性能的影响。结果表明:C/C-Cu复合材料压缩强度在平行和垂直方向差异小;随C/C多孔体密度升高,C/C-Cu复合材料压缩强度提高,各向异性得到改善;多孔体密度为1.65 g/cm3时,材料在平行和垂直两个方向的压缩强度都达到最大值,分别为323.8 MPa和326.6 MPa;平行方向以多层复合剪切破坏形式为主;垂直方向基本沿45°对角线方向剪切破坏。
Carbon fiber reinforced carbon and copper （C/C-Cu） composites were prepared by a combination of chemical vapor infiltration （CVI） and melt copper impregnation by pressure. 3 kinds of C/C-Cu composites with different densities of porous carbon/carbon composites （C/C substrates） were prepared and their compressive properties were tested on CSS-44100 electronic tensile testing machine. The effect of C/C substrate density on compressive property of C/C-Cu composites was studied. The results show that C/C-Cu composites have high compressive strengths, which have small differences between parallel and vertical direction. With the increase of the C/C substrate density, the compressive strength of C/C-Cu composites increases and the anisotropy improves. The one with highest density has the highest compressive strength of 323.8 and 326.6 MPa. The composites are shearing along with 45° diagonal line in vertical direction, while destroyed by delaminating split in parallel direction.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2014年第6期989-993,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金(51302322)
中央高校基础科研业务(2009QZJ008)
湖南省自然科学基金(No.11JJ6043)
