The tribological properties of Cf/Cu/C composites under applied electric current
The tribological properties of Cf/Cu/C composites under applied electric current
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DOI：
10.1016/j.triboint.2017.07.005
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发表时间：
2017-12
影响因子：
6.2
通讯作者：
Chaoyong Deng;J. Yin;Hong-bo Zhang;X. Xiong;Peipei Wang;Miao Sun
中科院分区：
文献类型：
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作者：
Chaoyong Deng;J. Yin;Hong-bo Zhang;X. Xiong;Peipei Wang;Miao Sun
采用C3H6+N2气氛中连续化学气相渗透(CVI)和呋喃树脂浸渍碳化(I/C)制备碳纤维(Cf)和铜纤维(Cu)织物增强碳基复合材料(Cf/Cu/C)。开发了一种具有二维网络铜网和三维网络碳纤维基体的新型结构，有望显着提高其机械和电气性能。结果表明，Cf/Cu/C复合材料具有优异的机械强度、导电性和耐电弧性能。此外，电流极大地影响Cf/Cu/C复合材料的滑动磨损行为。当电流小于50 A时，接触表面的温度、摩擦系数的波动和磨损率都非常低，但当电流达到或超过75 A时，这些特性的幅度增大，尤其是电弧放电率。当电流小于50 A时，主要失效机制为磨粒磨损，在较高电流条件下转变为粘着磨损，并伴有轻微的电弧烧蚀。
Carbon fibre (Cf) and copper fibre (Cu) fabric-reinforced carbon matrix composites (Cf/Cu/C) are prepared by sequential chemical vapour infiltration (CVI) in a C3H6+N2atmosphere and impregnation carbonization (I/C) with furan resin. A novel structure with two-dimensional network copper mesh and three-dimensional network carbon fibre matrix is developed, which is expected to significantly increase its mechanical and electrical properties. The results show that Cf/Cu/C composites have excellent mechanical strength, electrical conductivity and arc resistance. Furthermore, the electric current greatly influences the sliding wear behaviour of Cf/Cu/C composites. The temperature of the contact surface, the fluctuations in the friction coefficient, and the wear rate are very low when the electric current is less than 50 A, but the magnitude of these properties increases when the electric current reaches or exceeds 75 A, especially the arc discharge rate. The main failure mechanism is abrasive wear when the electric current is less than 50 A, which then transitions into adhesive wear at higher electric current conditions, accompanied by slight arc ablation.