Abstract: The aluminum matrix composites reinforced by short carbon fiber were prepared in non-vacuum furnace by the method of liquid state mechanical stirring casting.The C/Cu composite fiber was treated with H₃BO₃ after the carbon fiber was coated with copper in the electroless plating and electro plating process.The effects of dispersion of carbon fiber in the composite, existing state of copper plating and tensile properties of the composite were investigated. The results showed that the oxidation rate of copper decreased obviously and carbon fiber was uniformly dispersed and undamaged in the composite.The mechanical properties of the composite were not influenced by the H₃BO₃ added.The tensile strength of the composite increased with the increasing content of carbon fiber, which was 50% higher than that of the matrix material. However, the plasticity of the composite decreased obviously.

摘要： 通过化学镀再电镀的方法，在碳纤维表面镀上Cu镀层，制备C/Cu复合丝，并在硼酸的保护下，利用非真空条件下的液态机械搅拌法制备短碳纤维增强铝基复合材料，研究了碳纤维在复合材料中的分散程度，铜镀层存在状态及C/Al复合材料的拉伸性能.实验结果表明：在硼酸存在下，大大降低了铜的氧化程度，碳纤维分散均匀且没有损伤，少量硼酸的加入，对复合材料的力学性能没有影响，该复合材料的抗拉强度随碳纤维含量的增加而增加，其抗拉强度较基体材料提高50%以上，但塑性指标却明显下降.