纤维状态对碳纤维-铜基复合材料性能的影响

Influences of Fiber Condition on Properties of Copper Matrix Composite Material Reinforced by Carbon Fiber

以电解铜粉和碳纤维等为原料,采用冷压烧结法制备碳纤维-铜基复合材料并研究了纤维质量分数、纤维长度以及纤维电镀等对其性能的影响。结果表明,1）碳纤维-铜基复合材料的相对密度和导电性能都随着纤维质量分数的增加不断下降,强度和耐磨性却随着纤维质量分数的增加先上升后下降,当碳纤维质量分数在3.0%~4.5%之间时,复合材料具有较好的综合性能。2）随着纤维长度的增加,碳纤维-铜基复合材料的相对密度、导电性和耐磨性等会由于孔隙率的升高和界面结构变差而下降,强度却随着纤维长度的增加而先上升后下降。3）与预镀镍相比,采用碳纤维预镀铜的方法制备的碳纤维-铜基复合材料,导电性能提高,机械性能下降。

In this paper, using electrolytic copper powder and carbon fiber as raw material, copper ma- trix composite material reinforced by carbon fiber was prepared by cold-pressing sintering method, and the influences of carbon fiber content, carbon fiber length and carbon fiber plating on performance of the composite material were studied. Results showed that ： （ 1 ） with the increase of fiber content, density and electrical conductivity of the copper matrix composite material reinforced by carbon fiber would decrease continuously, while strength and wear resistance of the composite material would increase at first and then decreased, when the carbon fiber content was in 3% -4.5wt%, the composite material has better com- prehensive properties. （2） with the increase of fiber length, density, electrical conductivity and wear re- sistance of the copper matrix composite material reinforced by carbon fiber would decrease due to the po- rosity increasing and interface structure variation, while strength of the composite material would increase at first and then decreased. （3）compared with nickel pre-plating method, the electrical conductivity of carbon fiber reinforced copper matrix composite material prepared by copper pre-plating method was in- creased, but the mechanical property was decreased.