Alloy design for high-entropy alloys based on Pettifor map for binary compounds with 1:1 stoichiometry

A. Takeuchi, K. Amiya, T. Wada, K. Yubuta

研究成果: Contribution to journalArticle査読

12 被引用数 (Scopus)

抄録

Pettifor map for binary compounds with 1:1 stoichiometry was utilized as an alloy design for high-entropy alloys (HEAs) with exact or near equi-atomicity in multicomponent systems. Experiments started with selecting GuGd binary compound with CsCl structure from Pettifor map, followed by its extensions by selecting the binary compounds with the same CsCl structure to CuDyGdTbY equi-atomic quinary alloy and to Cu4GdTbDyY and Ag4GdTbDyY quinary alloys and Cu2Ag2GdTbDyY senary alloy in sequence. X-ray diffraction revealed that CuDyGdTbY alloy was formed into a HEA with mixture of bcc, fcc and hcp structures, whereas the Cu2Ag2GdTbDyY HEA was a single CsCl phase. The results suggest a potential of Pettifor map for the development of HEAs by utilizing its information of crystallographic structures. The further analysis was performed for composition diagrams of multicomponent systems corresponding to simplices in a high dimensional space. The present results revealed that a strategy of equi-mole of compounds instead of conventional equi-atomicity also works for the development of HEAs.

本文言語英語
ページ(範囲)56-66
ページ数11
ジャーナルIntermetallics
66
DOI
出版ステータス出版済み - 6 30 2015
外部発表はい

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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