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本文研究用冷压成型、高温烧结粉末冶金方法制造非连续碳纤维增强铜基复合材料的工艺,制成了碳纤维的体积含量范围为10—40%的碳铜复合体。通过正交实验,分析了多种因素对碳铜复合材料制作工艺的影响,确定了烧结温度为显著因子,并认为基体中锡的加入造成液相活化烧结,有利于提高复合材料的性能,筛选出来的优化工艺为:碳纤维的体积含量V_f=10—30%,成型压力P=3吨/厘米_2,烧结温度T=950℃,基体内含锡5%。实验表明:单独依靠冷压、烧结难以得到V_f大,致密度高的碳铜复合材料,文章最后就如何采取后续工艺提高冷压烧结碳铜复合材料的性能提出了一些看法。
In this paper, the cold-formed, high-temperature sintering powder metallurgy method of manufacturing non-continuous carbon fiber reinforced copper matrix composite process, made of carbon fiber volume content of 10-40% of the carbon-copper composite body. Through orthogonal experiment, the influence of many factors on the fabrication process of carbon-copper composites was analyzed, the sintering temperature was determined as a significant factor, and it was considered that the addition of tin in the matrix resulted in liquid phase activation sintering, which was beneficial to improve the properties of the composites. The optimization process is as follows: the volume content of carbon fiber V_f = 10-30%, the molding pressure P = 3 tons / cm_2, the sintering temperature T = 950 ° C and the content of tin in the matrix 5%. Experiments show that it is difficult to obtain the carbon-copper composite with large V_f and high density alone by means of cold pressing and sintering. Finally, some suggestions are put forward on how to improve the performance of cold-pressed sintered carbon-copper composites by follow-up process.