METASTABLE EXTENSION OF SOLID SOLUBILITY OF RARE-EARTH ELEMENTS IN Al

查看全文 作　　者：NING Yuantao ZHOU Xinming DAI Hong Institute of Precious Metals,Kunming,Yunnan,China 出　　处：《Acta Metallurgica Sinica(English Letters)》索引1992年第5卷第11期,共7页 摘　　要：The splat folis of Al-RE(RE=Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Er and Yb)binary alloys of 0.04—0.06 mm thickness were made by are-melting and hammer-anviltechnique,the.cooling rate is in 10⁶ K/s order of magnitude.The metastable extendedsolid solubilities of these RE elements have been evaluated by measurements of the latticespacings of the rapidly solidified(RS)Al-RE alloys,they are 0.4,0.15,0.21,0.21,0.3,0.5,0.1,0.6,0.65,0.7,0.75,0.2 at.-% for above individual RE clements,respectively.Thesecondary phase in RS Al-RE alloys were identified to be Al₄RE for alloys containinglight RE and Eu elements and Al₃ RE for alloys containing heavy RE and Y elements.Some factors influencing the extension of solid solubility of Al-RE alloy were discussed. 关 键 词：rapid SOLIDIFICATION solid SOLUBILITY Al-RE ALLOYS