Interface migration with segregation in MoSi2-based lamellar alloy simulated by phase-field method

Toshihiro Yamazaki, Yuichiro Koizumi, Akihiko Chiba, Koji Hagihara, Takayoshi Nakano, Koretaka Yuge, Kyosuke Kishida, Haruyuki Inui

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

MoSi2-based alloys are attracting attention as ultra-high temperature structural material for super-high efficiency gas turbine power generation systems. In this study, the effects of Cr- and Zr-addition on interface migration in MoSi2/NbSi2 lamellar silicide were examined by phase-field simulations employing the segregation energies evaluated by the first principles calculation in addition to thermodynamic free energy in order to take into account the chemically-driven interfacial segregation. The simulation results indicate that both Cr and Zr can segregate at the lamellar interface to suppress its migration, and the Zr-addition is more effective to lower the interface migration rate than the Cr-addition owing to its higher segregation energy.

本文言語English
ホスト出版物のタイトルTHERMEC 2013 Supplement
出版社Trans Tech Publications Ltd
ページ832-837
ページ数6
ISBN(印刷版)9783038350743
DOI
出版ステータスPublished - 2014
イベント8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013 - Las Vegas, NV, United States
継続期間: 2013 12 22013 12 6

出版物シリーズ

名前Advanced Materials Research
922
ISSN(印刷版)1022-6680

Other

Other8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013
国/地域United States
CityLas Vegas, NV
Period13/12/213/12/6

ASJC Scopus subject areas

  • 工学(全般)

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