采用粉末冶金法制备了碳纳米管-银-石墨复合材料,研究了圆周速度对复合材料摩擦系数、磨损量的影响.结果表明,当压力一定时,随着速度的加快,机械磨损的摩擦系数减小,而电磨损的摩擦系数增大;复合材料的电磨损量远远大于机械磨损的磨损量,电磨损时磨损量在V=10m/s处出现最小值,而机械磨损的磨损量随速度的加快而减小.
CNTs-Ag-G composite brushes are fabricated by means of powder metallurgy method.The effect of the circular velocity(5～15m/s) on the electrical wear properties of the composite is studied.The results indicate that the friction coefficient of the mechanical wear decreases with the increase of the circular velocity,but the friction coefficient of the electrical wear increases with the increase of the circular velocity.With the increase of the circular velocity,the mechanical wear rate increases and the electrical wear rate varies as "U" because of co-action of press,electrical current and temperature.
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