Al_2O_3·SiO_2短纤维增强铝镁合金复合材料的凝固组织  

Solidified Structure of Al_2O_3·SiO_2 Short Fiber Reinforced Aluminum-Magnesium Alloy Composites

作　　者：刘政[1] 张朋娜[2] 靖青秀[2] 朱应禄[2] 

机构地区：[1]江西理工大学教务处,江西赣州341000 [2]江西理工大学材料与化学工程学院,江西赣州341000

出　　处：《南方冶金学院学报》2004年第5期9-13,共5页Journal of Southern Institute of Metallurgy

基　　金：国家教育部科学技术研究重点项目(00191);江西省自然科学基金项目(0150032)

摘　　要：利用挤压铸造制备了Al2O3·SiO2短纤维增强铝镁合金复合材料,研究了复合材料的凝固组织和凝固偏析.研究结果表明,合金元素通过适当的化学反应可改善纤维与基体的结合;在复合材料的凝固末期,由于选择结晶,剩余液相中的溶质变化导致基体合金类型的改变,最终凝固偏析主要产生在纤维/基体界面上.偏析对材料的组织结构和性能的影响可能是双重的.Al2O3·SiO2 short fiber reinforced aluminum-magnesium alloy composites are manufactured by squeeze casting. Solidified structure and solidification seg regation in the composites is studied. The results indicate that the alloy eleme nts can improve the combination between the fibers and the matrix in the composi tes by the proper chemical reactions. At the end of solidification of the compos ites, the change of the solute in the surplus liquid phase results in the type o f matrix alloy being changed because of the selecting crystallization, and the s egregation at interface is finally formed.There may be the dual effects of the s egregation on structures and property of the composites.

关 键 词：复合材料 铝镁合金 凝固组织 凝固偏析 

分 类 号：TG144[一般工业技术—材料科学与工程]