(西北工業(yè)大學(xué) 凝固技術(shù)國家重點實驗室，西安 710072)
摘 要: 采用含Ti的銅合金及無壓反應(yīng)浸滲工藝制備C/Cu復(fù)合材料，利用XRD，SEM和EDS等檢測手段分析研究試樣的顯微組織，討論浸滲過程中的界面反應(yīng)。結(jié)果表明：在銅基體中加入強碳化物形成元素Ti，可提高銅及銅合金與碳的自發(fā)潤濕性，使無壓浸滲工藝制備C/Cu復(fù)合材料成為可能；復(fù)合材料中的主相為Cu、C和TiC，TiC以溶解析出的形式形成于碳纖維周圍，合金中的Ti含量決定復(fù)合材料中TiC的含量，適量Ti可降低系統(tǒng)的潤濕角并有利于浸滲進行，但Ti過量將對纖維造成損傷，使復(fù)合材料中碳纖維的體積分數(shù)下降。
關(guān)鍵字: Cu基復(fù)合材料；C纖維；無壓浸滲
（State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China）
Abstract:C/Cu composites were synthesized by pressureless reactive infiltration of CuTi alloy into carbon fiber preforms. The microstructure of composites and interface reaction was investigated by X-ray diffractometry, energy dispersive spectrometry and scanning electron microscopy. The results show that Ti adding into Cu-based alloy tends to combine with carbon to form titanium carbide, thus enhances the wettability of carbon fiber by copper, and then pressureless infiltration becomes available. The titanium carbide precipitates in the liquid metal around the carbon fiber in the form of solution-separation style. The titanium carbide content of composites is determined by the amounts of titanium in liquid metal. The appropriate amounts of titanium has a beneficial effect on the infiltration while the excess amounts of it damages the carbon fiber and thus decreases the volume fraction.
Key words: copper matrix composite; carbon fiber; pressureless infiltration
