Reassessment of solid solubilities and thermodynamic properties of magnesium and calcium in silicon

Sakiko Kawanishi, Takeshi Yoshikawa

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    To obtain fundamental knowledge on the behavior of magnesium (Mg) and calcium (Ca) in solid silicon (Si) during solidification, the solid solubilities of Mg and Ca in Si were reinvestigated by temperature-gradient zone melting method. Solubilities were measured to be 0.0016-0.0041 mol% for Mg and 0.0006-0.0021 mol% for Ca at 1373-1623 K. The excess Gibbs energies of Mg and Ca in solid Si were determined from their solid solubilities as follows: RTlnγ° Mg() in solid Si = 193,000(±52,000) - 69.8(±34)T (J/mol) RTlnγ °Ca(s) in solidSi = 140,000(±35,000) - 72.6(±23)T (J/mol).

    Original languageEnglish
    Pages (from-to)450-452
    Number of pages3
    JournalMaterials Transactions
    Volume58
    Issue number3
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Calcium
    • Magnesium
    • Silicon
    • Solid solubility
    • Temperature-gradient zone melting

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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