Phase equilibria and oxidation behavior of C40 disilicides in the Nb-Cr-Si system

Nobuaki Sekido, Ryoma Aizawa, Shunkichi Ueno

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

Abstract

The phase equilibrium and oxidation behavior of the disilicides that form in the Nb-Cr-Si ternary system have been investigated. Although NbSi2 and CrSi2 both exhibit a C40 crystal structure, they form separate ranges of compositional homogeneity in the ternary system. Their phase boundaries at 1300 °C have been experimentally determined in this study. The binary NbSi2 exhibited poor oxidation resistance, showing pest-like behavior during oxidation at temperature above 800 °C. In contrast, the alloys containing Cr showed much better oxidation resistance up to 1200 °C.

Original languageEnglish
Title of host publicationAdvanced Structural and Functional Intermetallic-Based Alloys
EditorsM. Heilmaier, I. Baker, K. Kishida, M. Mills, S. Miura
PublisherMaterials Research Society
Pages108-113
Number of pages6
ISBN (Electronic)9781510806344
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes
Event2014 MRS Fall Meeting - Boston, United States
Duration: 2014 Nov 302014 Dec 5

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1760
ISSN (Print)0272-9172

Other

Other2014 MRS Fall Meeting
CountryUnited States
CityBoston
Period14/11/3014/12/5

ASJC Scopus subject areas

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

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  • Cite this

    Sekido, N., Aizawa, R., & Ueno, S. (2015). Phase equilibria and oxidation behavior of C40 disilicides in the Nb-Cr-Si system. In M. Heilmaier, I. Baker, K. Kishida, M. Mills, & S. Miura (Eds.), Advanced Structural and Functional Intermetallic-Based Alloys (pp. 108-113). (Materials Research Society Symposium Proceedings; Vol. 1760). Materials Research Society. https://doi.org/10.1557/opl.2015.29