摘要
采用热压烧结法制备Cf/TiC/Cu复合材料,研究Cf/TiC/Cu复合材料的界面反应原理及微观形貌,以及碳纤维(Cf)含量对复合材料密度、强度等性能的影响。结果表明:Cu-C-Ti三元体系在低于1100℃时,溶解在铜液中的钛原子与碳纤维接触发生反应,在碳纤维表面形成以TiC为主相的过渡层。该过渡层靠近铜液的一侧可能覆盖着一层钛铜化合物膜,TiC通过该膜层与铜紧密结合在一起,改善铜与碳纤维的界面结合,因此有利于提高Cf/TiC/Cu复合材料的性能。在钛含量不变的情况下,随碳纤维含量(质量分数)的增加,材料性能有所降低,当碳纤维含量为5%时,Cf/TiC/Cu复合材料的综合性能最好,其电阻率低达0.054μΩ·m,平行于压力方向的抗弯强度为237.90MPa,垂直于压力方向的抗弯强度为237.44MPa。
The Cf/TiC/Cu composites were prepared by the hot-pressed sintering.The mechanism of interface reaction between copper and carbon fiber（Cf） and the microstructure of composites were studied.The effects of Cf content on the density and bending strength of Cf/TiC/Cu composites were investigated.The results indicate that the transition layer with TiC as the main phase surrounding the carbon fiber is generated due to the reaction between titanium dissolved in the liquid copper and carbon in the ternary system of Cu-C-Ti.A film of Ti-Cu compounds maybe covers the side of the transition layer near the liquid copper,which tightly combines TiC with copper and improves the combination between copper and carbon fiber,thus the properties of Cf/TiC/Cu composites are improved.When the Ti content is certain,the properties of Cf/TiC/Cu composites get worse with the Cf content（mass fraction） increasing.When the Cf content is 5%,the synthetic properties of Cf/TiC/Cu composites are the best,the resistivity is 0.054 μΩ·m,the bending strength parallel to the pressure direction is 237.90 MPa,and the bending strength perpendicular to the pressure direction is 237.44 MPa.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第8期1605-1611,共7页
The Chinese Journal of Nonferrous Metals
基金
福州大学科技发展基金资助项目(2006-XQ-01)
福州大学人才基金资助项目(XJY-0305)
关键词
短碳纤维
复合材料
热压烧结
抗弯强度
short carbon fiber
composite materials
hot-pressed sintering
bending strength
