低放热系Ni_3Si有序合金的活化燃烧合成  

COMBUSTING-SYNTHESIS OF WEAK-EXOTHERMIC ORDERED ALLOY Ni_3Si

作　　者：马勤[1] 朱雪斌[1] 季根顺[1] 王翠霞[1] 

机构地区：[1]甘肃工业大学材料科学与工程学院,兰州730050

出　　处：《有色金属》2002年第1期1-3,共3页Nonferrous Metals

基　　金：国家教育部高校骨干教师基金资助项目

摘　　要：采用机械活化燃烧合成技术配合预热措施 ,制备低放热反应体系的Ni3Si有序合金。用X -射线衍射仪和扫描电子显微镜观察分析反应物和生成物的形貌与物相组成。结果表明 ,产物主晶相为Ni3Si及少量Ni5Si2 和Ni3Si2 等富硅相的混合物。研磨时间越长 ,预热温度越高 。The Ni 3Si intermetallic compound powder is produced by using combusting-synthesis co-operated with mechanoactivation(MA) and preheating. The mineral composition of the products is analyzed by X-ray diffractometer and the microstructure is observed by scan electricity micrograph. The results show that Ni 3Si powder is the main component companied with a little Ni 5Si 2 and Ni 3Si 2 in the product obtained by combusting-synthesis method with techniques of MA and preheating. The longer of the time of MA and the higher the preheating temperature, the easier the combusting-synthesis processing is in the conditions of the experiment.

关 键 词：燃烧合成 NI3SI 低放热反应 机械活化 预热 金属间化合物 有序合金 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TF125.212[金属学及工艺—金属材料]