(中南大學(xué) 粉末冶金國家重點實驗室，長沙 410083)
摘 要: 采用MoS2、碳纖維(CF)及特種碳纖維(SCF)作為潤滑相，制備3種固體潤滑復(fù)合材料(Ag-2.5Cu-8MoS2、Ag-2.5Cu-8MoS2-3CF、Ag-2.5Cu-8MoS2-3SCF)，對所得材料進行系統(tǒng)的摩擦磨損性能測試，重點關(guān)注各潤滑相對材料摩擦磨損性能的影響規(guī)律。結(jié)果表明：獨立采用MoS2作為潤滑相時可使材料獲得較好的摩擦磨損性能和較低的摩擦因數(shù)，其磨損率為24×10−14 m3/(N·m)，摩擦因數(shù)為0.122；添加碳纖維能提高材料的耐磨性能，其中添加特種碳纖維所得材料Ag-2.5Cu-8MoS2-3SCF的磨損率最低(4.08×10−14 m3/(N·m))，其耐磨性能比Ag-2.5Cu-8MoS2的提高了6倍，但添加碳纖維顯著增加了材料的摩擦因數(shù)，測試過程發(fā)現(xiàn)加入碳纖維后材料的摩擦因數(shù)由0.122分別升至0.154(CF)和0.167(SCF)。由于特種碳纖維材料較高的硬度(319.369 HV)和較好的耐磨性以及MoS2較好的潤滑性能，采用特種碳纖維和MoS2對銀基材料進行復(fù)相潤滑可使材料獲得較好的綜合摩擦磨損性能。
關(guān)鍵字: 碳纖維；銀基復(fù)合材料；自潤滑；摩擦磨損
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:MoS2, carbon fiber (CF) and special carbon fiber (SCF) were used as lubricants, and three kinds of solid lubricating composite materials (Ag-2.5Cu-8MoS2, Ag-2.5Cu-8MoS2-3CF, Ag-2.5Cu-8MoS2-3SCF) were produced by hot press process. The friction and wear properties of these materials were conducted, and the variation of the friction and wear properties with the various lubrication phases was explored. The results show that, the Ag-2.5Cu-8MoS2 get better friction and wear properties and lower friction coefficient, the wear rate is 24×10−14m3/(N·m), the friction coefficient is 0.122; The addition of carbon fiber can improve the wear resistance of material, and the Ag-2.5Cu-8MoS2-3SCF gains the lowest wear rate(4.08×10−14 m3/(N·m)), which increases six times over Ag-2.5Cu-8MoS2. However, the addition of carbon fiber obviously increases the friction coefficient of materials, the friction coefficient increases from 0.122 to 0.154 (CF) and 0.167 (SCF), respectively. The improving wear strengthening effect is obvious, which is caused by the well wear-resisting property, high hardness (319.369 HV) of the special carbon fiber and the better frictional property of MoS2.
Key words: carbon fiber; silver-based composite material; self-lubricating; friction and wear
