The Relation between Vaporization Entropy and Surface Tension at Temperatures near Melting Point

• Yoshida Akito

  Faculty of Engineering, Kumamoto University

抄録

The relations among the quantities participating in surface formation have been studied on the basis of the following assumptions: (i) There is an analogy between surface formation and vaporization. (ii) The surface tension as a function of temperature is given by the equation, γ∝(1−T⁄T_c)^B, where T_c is the critical temperature and B is the exponent.<BR>Based on the above assumptions the following expressions for the relations among surface quantities are determined by statistical analysis of experimental data: (1) The surface entropy is given by the equation, s≈0.1S, where S the specific vaporization entropy in J/(m²·K), defined as the vaporization entropy per unit area of the monatomic layer in bulk. (2) The surface tension is given by the equation, γ=1.536×10⁴ S^1.62, where γ is the surface tension in N/m. (3) The surface tension is given by the equation, γ=0.152+4.61×10⁻⁴ E_v⁄V^2⁄3, where E_v, is the formation energy of a vacancy in eV and V is the atomic volume in m³.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 25 (2), 105-112, 1984

  社団法人 日本金属学会

キーワード

• surface tension
• surface entropy
• liquid metals
• vaporization entropy
• formation energy of a vacancy
• critical temperature
• triple point
• hole model
• phenomenological expression

詳細情報

• CRID: 1390282680095414016
• NII論文ID: 130003486125
• DOI: 10.2320/matertrans1960.25.105
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/25/2/25_2_105/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可