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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationTHERMEC 2013 Supplement
PublisherTrans Tech Publications Ltd
Pages832-837
Number of pages6
ISBN (Print)9783038350743
DOIs
Publication statusPublished - 2014
Event8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013 - Las Vegas, NV, United States
Duration: 2013 Dec 22013 Dec 6

Publication series

NameAdvanced Materials Research
Volume922
ISSN (Print)1022-6680

Other

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

Keywords

  • Phase-field simulation
  • Refractory material
  • Silicide

ASJC Scopus subject areas

  • Engineering(all)

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