(中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室，長沙 410083)
摘 要: 以針刺整體炭氈為預(yù)制體，采用化學(xué)氣相滲透法(CVI)增密制備C/C多孔體，然后采用反應(yīng)熔體浸滲法(RMI)，將Cu與Si同時(shí)熔滲進(jìn)C/C坯體中制備CuxSiy改性C/C-SiC復(fù)合材料。研究CuxSiy改性C/C-SiC復(fù)合材料的組織結(jié)構(gòu)、力學(xué)性能和摩擦磨損性能，并與C/C-SiC復(fù)合材料進(jìn)行對比。結(jié)果表明：CuxSiy改性C/C-SiC復(fù)合材料的彎曲強(qiáng)度和沖擊韌性略低于C/C-SiC復(fù)合材料的；采用30Cr鋼作對偶時(shí)，CuxSiy改性C/C-SiC復(fù)合材料的摩擦因數(shù)約為0.24，線磨損率小于4 µm·side−1·cycle−1，均與C/C-SiC復(fù)合材料的相近，但其摩擦表面溫度降低約50 ℃；以自身材料作對偶時(shí)，CuxSiy改性C/C-SiC復(fù)合材料的摩擦磨損性能略低于C/C-SiC復(fù)合材料的。
關(guān)鍵字: CuxSiy改性C/C-SiC復(fù)合材料；力學(xué)性能；摩擦磨損性能
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:CuxSiy modified C/C-SiC composites were fabricated by infiltrating Cu and Si into C/C porous performs that were prepared by chemical vapor infiltration (CVI). The microstructure, mechanical and tribological properties of CuxSiy modified C/C-SiC composites were investigated and compared with those of C/C-SiC composites. It is shown that the flexural strength and impact toughness of CuxSiy modified C/C-SiC composites are a little lower than those of C/C-SiC composites. With 30Cr steel as couple parts, the friction coefficients of CuxSiy modified C/C-SiC composites are about 0.24 and their linear wear rates are less than 4 µm·side−1·cycle−1, which are both close to those of C/C-SiC composites. But the temperature of friction surface of CuxSiy modified C/C-SiC composites is reduced by about 50 ℃. With the same composites as couple parts, the tribological properties of CuxSiy modified C/C-SiC composites are a little worse than those of C/C-SiC composites.
Key words: CuxSiy modified C/C-SiC composites; mechanical property; tribological property
