Al_(72)Ni_(12)Co_(16)单相准晶合金的凝固特性研究  

Solidification Character of Al_(72)Ni_(12)Co_(16) Single-Decagonal Quasicrystal Alloy

作　　者：程素玲[1] 杨根仓[1] 朱满[1] 王锦程[1] 刘峰[1] 周尧和[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《铸造》2009年第12期1205-1207,1211,共4页Foundry

基　　金：国家自然科学基金(50571081);航空科学基金(04G53024)资助项目

摘　　要：利用普通浇注方法和SEM、XRD、DTA、TEM等分析手段,研究了Al72Ni12Co16准晶合金的结构旋转对称特征、微观组织与凝固特性。研究结果表明,在普通铸造条件下,Al72Ni12Co16合金为单相多孔组织。合金在凝固过程中,准晶直接从液相中析出,该合金的液相线温度与包晶反应温度相隔很近,说明该准晶为近一致熔融化合物。The rotation symmetry, microstructure and solidification character of Al72Ni12Co16 quasicrystal alloy were studied by the conventional casting method and SEM, XRD, DTA and TEM analysis. The results indicate that under the conventional casting condition, the Al72Ni12Co16 alloy exhibits a single and porosity microstructure. During the solidification, the quasicrystal phase precipitates directly from the liquid. The Al72Ni12Co16 decagonal quasicrystal phase is a nearly congruent compound where the liquidus and peritectic-reaction lines are very close.

关 键 词：Al—Ni-Co十次准晶 凝固 气孔 准晶体生长 

分 类 号：TG27[金属学及工艺—铸造]