RELATIONSHIP BETWEEN METASTABLE EXTENSION OF SOLID SOLUBITY OF EUTECTIC SYSTEMS AND PHASE DIAGRAM

Acta Metall Sin

1988, Vol. 24

Issue (4): 305-308 DOI:

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RELATIONSHIP BETWEEN METASTABLE EXTENSION OF SOLID SOLUBITY OF EUTECTIC SYSTEMS AND PHASE DIAGRAM

NING Yuantao Institute of Precious Metals; Kunming

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NING Yuantao Institute of Precious Metals; Kunming. RELATIONSHIP BETWEEN METASTABLE EXTENSION OF SOLID SOLUBITY OF EUTECTIC SYSTEMS AND PHASE DIAGRAM. Acta Metall Sin, 1988, 24(4): 305-308.

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Abstract A criterion of the metastable extension of solid solubility was propo-sed. When the eutectic concentration arm ratio parameter of an alloy, J>10, thehypereutectic extension and the metastable solid solubity limit beyond eutecticconcentration may be obtained. When J≤10, the hypoeutectic extension may be obtained. The extension parameter, C_(eq)~s/C_(eu), is directly proportional to the parameter J.Thus, it seems easy to predict the tendency of the solid solubility extension underrapid solidification on the basis of the eutectic phase diagram.

Key words: eutectic system solid solubility extension phase diagram

Received: 18 April 1988

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