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采用压力浸渍和真空渗透的工艺制备了泡沫铜/聚酰亚胺互穿型复合材料,并重点研究了其作为滑动电接触材料的热稳定性,力学性能与摩擦磨损等方面性能。实验结果表明:该互穿型复合材料具备良好的耐热性,同时与不含泡沫铜的聚酰亚胺树脂基复合材料相比,其布氏硬度及抗弯强度等力学性能有一定的提高,滑动电接触性能从电压降的角度来说则有显著的改善。其次,研究发现该材料的磨损机制主要为疲劳磨损,同时伴随着轻微的磨粒磨损和氧化磨损。该材料在不同实验条件下都显示出较好的耐磨性,这表明泡沫铜与聚酰亚胺复合后的互穿型结构起了关键作用。
The foam copper / polyimide interpenetrating composites were prepared by pressure impregnation and vacuum infiltration process, and their thermal stability, mechanical properties and friction and wear properties as sliding contact materials were studied. The experimental results show that the interpenetrating composites have good heat resistance, while the mechanical properties such as Brinell hardness and flexural strength are improved compared with the non-foamed copper-containing polyimide resin matrix composites , Sliding electrical contact performance from the voltage drop point of view there is a significant improvement. Second, the study found that the wear mechanism of the material is mainly fatigue wear, accompanied by slight abrasive wear and oxidation wear. The material shows good abrasion resistance under different experimental conditions, indicating that the interpenetrating structure of the foam copper and the polyimide plays a key role.