【摘要】 采用复合电铸工艺制备了铜基碳纤维粉复合材料,研究了脉冲通电时间、脉冲峰值电流密度对复合材料摩擦磨损性能的影响.结果表明:脉冲通电时间与复合材料摩擦系数呈现负相关性,摩擦系数范围为0.31～0.48,复合材料磨损量在20×10^-3～90×10^-3 mm3之间减增,脉冲通电时间对复合材料摩擦磨损性能的影响较为显著;脉冲峰值电流密度与复合材料摩擦系数呈现负相关性,摩擦系数范围为0.22～0.35,复合材料磨损量在16×10^-3～37×10^-3 mm³之间减增,脉冲峰值电流密度对提高复合材料耐磨性的作用不显著.基于实验结果分析了材料的摩擦磨损机理,得出复合材料中碳纤维粉的存在可使复合材料获得摩擦自润滑能力的结论.更多还原

【Abstract】 The influence of pulse power time and pulse peak current density on the friction and wear properties of copper matrix carbon fiber composite prepared by electroforming is studied.Experimental conclusion is as follows.Pulse current time has negative correlation with friction coefficient of the composite.The range of the composite coefficient of friction is 0.31—0.48,the abrasion loss is 20×10^-3—90×10^-3 mm³.So pulse current time influence on friction and wear properties of the composite is relatively significant.The peak current density is negatively correlated with the friction coefficient of the composite.The range of the composite coefficient of friction is 0.22—0.35,the abrasion loss is 16×10^-3—37×10^-3 mm³.Therefore,the pulse peak current density affection on improve the wear resistance of the composite is not significant.Based on the experimental results,the friction and wear mechanism of the composite is analyzed,and the composite materials can obtain self-lubricating ability because of carbon fiber powder.更多还原