摘要
采用压力浸渗凝固成型方法制备了树脂碳化碳 /碳纤维 /铜 (C/CF/Cu)复合材料 ,借助于抗拉强度测试以及扫描电镜下复合界面、组成物分布和断口形貌观察 ,探讨了树脂碳化温度、C/CF先驱丝表面镀铜以及铜液浸渗凝固压力对C/CF/Cu基复合材料的影响。结果表明 ,随着真空碳化温度的提高 ,C/CF先驱丝的抗拉强度降低。 60 0℃真空碳化处理可使C/CF先驱丝有较高的抗拉强度 (12 0 7MPa) ,同时有利于先驱丝导电和表面镀铜。在C/CF先驱丝表面镀铜厚度为 40～ 60 μm ,有助于制备界面结合良好和抗拉强度较高的C/CF/Cu基复合材料。随着铜液浸渗凝固压力的提高 ,C/CF/Cu基复合材料的抗拉强度升高 ,当压力为2 8.5MPa时 ,复合材料的界面结合良好 ,组成相分布均匀 ,抗拉强度达到 5 95MPa ,是纯铜的 3倍以上。
Carbon/Carbon fibers/Cu(C/CF/Cu) composites was prepared by squeezing casting. The effects of resin carbonated temperature, C/CF wire preform with copper plating and squeezing pressure on C/CF/Cu matrix composites were studied by tensile strength test and morphology observation of composite interface, constituent distribution and fracture appearance by SEM. The results showed that the tensile strength of C/CF wire preform decreased with carbonated temperature increase in vacuum condition. The C/CF wire preform exhibited a higher tensile strength (1 207 MPa), better electric conductivity and copper plating at carbonated temperature of 600 ℃ in vacuum condition. The prepared C/CF reinforced Cu matrix composites with good sound interface and higher tensile strength may be obtained,preferably with C/CF wire preform in 40～60 μm copper plating thickness.With squeezing pressure increase, the tensile strength of the composites distinctly increased and reached up to 595 MPa , equivalent to more than three times of pure Cu with 28.5 MPa squeezing pressure.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2004年第6期20-22,共3页
Special Casting & Nonferrous Alloys
基金
广东省自然科学基金资助项目 (0 32 1 0 2 )
