METASTABLE EXTENSION OF SOLID SOLUBILITY OF RARE EARTH ELEMENTS IN Al

Acta Metall Sin

1992, Vol. 28

Issue (3): 49-54 DOI:

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METASTABLE EXTENSION OF SOLID SOLUBILITY OF RARE EARTH ELEMENTS IN Al

NING Yuantao;ZHOU Xinming;DAI Hong Institute of Precious Metals; Kunming

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NING Yuantao;ZHOU Xinming;DAI Hong Institute of Precious Metals; Kunming. METASTABLE EXTENSION OF SOLID SOLUBILITY OF RARE EARTH ELEMENTS IN Al. Acta Metall Sin, 1992, 28(3): 49-54.

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Abstract The splat foils, 0.04--0.06 mm thick, of Al--RE (RE=Y, La, Ce, Pr, Nd, Sm,Eu, Gd, Tb, Dy, Er, Yb) binary alloys were made by arc--melting and hammer--anvil techniqueat cooling rate in 10~6 K / s order of magnitude. The metastable extended solid solubilities ofthese RE elements have been evaluated by measurements of the lattice spacings of the rapidlysolidified 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, 0.2at.--% for above mentioned individual RE metal, respectively. The secondary phase in rapidlysolidified Al--RE alloys was identified to be Al_4RE for alloys containing light RE and Eu andAl_3RE for alloys containing heavy RE and Y. Some factors influencing the extension of solidsolubility of Al--RE alloys were discussed.

Key words: rapid solidification solid solubility Al-RE alloy

Received: 18 March 1992

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1992/V28/I3/49

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