(天津工業(yè)大學(xué) 紡織學(xué)院，天津市和教育部共建先進(jìn)紡織復(fù)合材料重點(diǎn)實(shí)驗(yàn)室，天津300160)
摘 要: 采用碳纖維織造了三維角聯(lián)鎖和三向正交2種不同三維機(jī)織物，首先采用化學(xué)氣相滲透(CVI)使其致密，再采用液相樹脂浸漬/碳化的補(bǔ)充增密技術(shù)，制備出粗糙層結(jié)構(gòu)熱解碳和樹脂碳雙元基體C/C復(fù)合材料；對該C/C復(fù)合材料進(jìn)行摩擦磨損實(shí)驗(yàn)，采用光學(xué)顯微鏡、掃描電鏡對三維機(jī)織物增強(qiáng)的C/C復(fù)合材料的摩擦面以及磨屑形貌進(jìn)行觀察，對其磨損機(jī)理進(jìn)行分析。結(jié)果表明：三維角聯(lián)鎖C/C復(fù)合材料比三向正交C/C復(fù)合材料的摩擦因數(shù)低(分別為0.40和0.48)，二者的摩擦性能均穩(wěn)定，后者比前者磨損量小，說明Z向纖維束有利于提高摩擦因數(shù)并降低磨損量。
關(guān)鍵字: C/C復(fù)合材料；摩擦；磨損；三維機(jī)織預(yù)制體
（Tianjin and Ministry of Education Key Laboratory of Advanced Textile Composite Materials,
School of Textile, Tianjin Polytechnic University, Tianjin 300160, China）
Abstract:Two different kinds of structural preforms were designed and manufactured using carbon fiber, which were 3D angle-interlock structure and 3D solid orthogonal panel structure. C/C composites with mix pyrolytic carbon and resin carbon matrix, were made firstly by chemical vapor infiltration (CVI) and then liquid resin impregnation for complementary. The tribological properties of the two 3D woven reinforced C/C composites were measured. The surface microstructure and wear debris on the wear-induced surfaces of 3D woven fabric C/C composites disks were investigated by optical microscopy and scanning electron microscopy. The friction and wear mechanism were researched. The results show that 3D angle-interlock weave reinforced C/C composites behaves lower average coefficients of friction than 3D solid orthogonal panel weave reinforced C/C composites of about 0.40 and 0.48, respectively, whereas the properties of friction are stable. The wear rate of the latter is less than that of the former. The existence of Z direction fiber is propitious to increasing the coefficients of friction and decreasing the wear rate.
Key words: carbon-carbon composites; friction; wear; 3D woven preform
