铝在B_4C陶瓷上的润湿性  

Wettability of Al on B4C Substrate

作　　者：王希军[1] 马南钢[1] 丁华东[2] 傅苏黎[2] 翁哲[1] 方圆[1] 

机构地区：[1]华中科技大学材料成型与模具技术国家重点实验室,湖北武汉430074 [2]装甲兵工程学院装备再制造系,北京100072

出　　处：《机械工程材料》2008年第5期15-19,共5页Materials For Mechanical Engineering

基　　金：总装备部重点基金资助项目(6140505)

摘　　要：运用座滴法研究了纯铝及铝-钛合金在B4C陶瓷基体上的润湿性,用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)分析了B4C/(Al-Ti)的界面特性,讨论了提高温度和添加钛对B4C/Al体系润湿性的影响。结果表明:提高温度能使体系的接触角减小;合金元素钛的添加使接触角进一步减小,与纯铝相比,铝-钛合金在1 200℃和1 300℃时均与B4C形成接近0°的接触角,显著改善了润湿性;在B4C陶瓷和合金之间存在反应层,主要有AlB12C2、TiB2和TiC,正是钛与B4C发生的界面反应才使B4C/Al体系的润湿性得到改善。The wettability of Al on B4C substrate was studied by using the sessile-drop method,and the interfacial characteristics of B4C/(Al-Ti)were investigated by scanning electron microscopy,energy dispersive analysis of X-rays and X-ray diffraction.Based on the experiments,the effects of temperature and Ti on the wettability of Al on B4C substrate were discussed.The results show that the contact angle(θ) reduces continuously with the increase of temperature and decreases definitely with the addition of Ti.Ti coul...

关 键 词：碳化硼 铝 座滴法 润湿性 

分 类 号：TQ174.1[化学工程—陶瓷工业]