利用电磁成形技术制备连续碳纤维增强铝基复合材料,解决了传统制备工艺中界面反应严重、制备周期长、设备要求高等问题。在碳纤维预热温度为380℃,熔炼温度为900℃,最终保温温度为750℃等工艺参数下,研究了电磁成形过程中放电电压对复合材料微观组织和力学性能的影响。结果表明,当放电电压为2 500V时,复合材料界面平整,结合良好,界面处未见Al4C3脆性相的生成,且相比基体,复合材料的抗拉强度从91.10 MPa提高到了101.76 MPa,增加了11.7%,硬度(HBW)达到35.8。
Continuous carbon reinforced aluminum matrix composites were prepared through electromagnetic forming technology to improve serious interface reaction,long preparation period and high device requirement in traditional methods.The effects of discharge voltage on microstructure and mechanical properties of the composites prepared by the optimized parameters,such as the preheating temperature of carbon fiber of 380 ℃,smelting temperature of aluminum alloy of 900 ℃ and heat preservation temperature of 750 ℃.The results reveal that with the charging voltage of 2 500 V,interfaces of the composites exhibits well-bonded with absence of Al4C3 brittle phases in the interfaces.Compared with those of the matrix,the tensile strength and Brinell hardness of Cf/Al composites are increased from 91.10 MPa to 101.76 MPa,increased by 11.7%,and 35.8HBW.