(1. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083
2. 中南林業(yè)科技大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)沙 410004)
摘 要: 采用模壓法制備了一種新型的炭纖維混雜銅網(wǎng)增強(qiáng)樹(shù)脂基復(fù)合材料(Cf/PF-Cu復(fù)合材料)，并在銷(xiāo)盤(pán)式載流摩擦磨損試驗(yàn)機(jī)上進(jìn)行了試驗(yàn)。在電流分別為0 A和50 A條件下，研究壓力(p)-速度(v)因素(簡(jiǎn)稱(chēng)pv因素，數(shù)值分別為5、10、15、20、25、30和35 MPa？m/s)對(duì)Cf/PF-Cu復(fù)合材料載流摩擦磨損性能的影響。結(jié)果表明：在非載流條件下，摩擦因數(shù)隨pv值的增加呈逐漸下降趨勢(shì)，質(zhì)量磨損率則呈緩慢增加趨勢(shì)，變化均非常小。在載流條件下，摩擦因數(shù)隨pv值的增加變化不大，而質(zhì)量磨損率則變化劇烈；當(dāng)pv值在15~35 MPa？m/s范圍時(shí)，質(zhì)量磨損率隨pv值的增加而急劇增加。在載流摩擦磨損過(guò)程中，隨著pv值的增加，摩擦磨損機(jī)制逐漸由磨粒磨損轉(zhuǎn)變?yōu)轲ぶp，在pv值達(dá)到35 MPa？m/s時(shí)則表現(xiàn)為顯著的氧化磨損和熔融噴濺。
關(guān)鍵字: Cf/PF-Cu 復(fù)合材料；摩擦；磨損；磨損機(jī)制
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China）
Abstract:Carbon fibre (Cf) and copper fibre (Cu) fabric-reinforced phenol formaldehyde (PF) matrix composites (Cf/PF-Cu) were prepared by hot-pressing method, and then current-carrying friction and wear testing was carried on. The effect of pressure (p)-velocity (v) factor (pv factor for short) on the tribological behavior was investigated. Friction and wear tests were conducted on a pin-on-disc type wear tester. The tests were performed at two electrical currents (0 A and 50 A) and seven different combinations of contact pressure and sliding velocity (5, 10, 15, 20, 25, 30 and 35 MPa？m/s). The results indicate that the friction coefficient decreases with an increase in the pv value, and the wear rate slightly increases with an increase in the pv value when the current is 0 A. When the electrical current is 50 A, the friction coefficient increases little with the increase of the pv value, but the mass wear rate increases drastically. As the pv value increases, the wear behavior gradually changes from abrasive wear to adhesive wear. When the pv value reaches 35 MPa？m/s, the wear behavior performs as oxidative wear and melt ejection of copper alloy.
Key words: Cf/PF-Cu composites; wear; friction; wear mechanism
