Thermodynamic analysis of the Nb-Ti-B ternary phase diagram

Yu Nakama, Hiroshi Ohtani, Mitsuhiro Hasebe

研究成果: Article査読

12 被引用数 (Scopus)

抄録

A thermodynamic analysis of the Nb-Ti-B ternary system was carried out by estimating the unknown thermodynamic properties of binary and ternary borides by using a first-principles method. The calculated value for the binary TiB 2 phase was in reasonable agreement with those found by experiment. Due to a lack of experimental values concerning thermodynamic properties of the ternary system, the formation enthalpies for the Nb3B 2-Ti3B2, NbB-TiB (Cmcm), NbB-TiB (Pnma), Nb5B6-Ti5B6, Nb3B 4-Ti3B4, and NbBs2-TiB2 pseudo-binary sections were also determined by constructing various kinds of superstructures for binary borides. The thermodynamic functions determined using these theoretical values, as well as the available experimental information on the phase fields, successfully revealed the phase equilibria in the Nb-Ti-B ternary system across the entire composition and all temperature ranges.

本文言語English
ページ(範囲)984-993
ページ数10
ジャーナルMaterials Transactions
50
5
DOI
出版ステータスPublished - 2009 5

ASJC Scopus subject areas

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

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