Role of thermal vacancies on temperature dependence of lattice parameter and elastic moduli in B2-type FeAl

Mi Zhao, Kyosuke Yoshimi, Kouichi Maruyama, Kunio Yubuta

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

Abstract

Temperature dependence of the lattice parameter and elastic moduli in Fe-40 and -43Al (at.%) was investigated by high temperature X-ray diffractometry (XRD) and the Electro-Magnetic Acoustic Resonance (EMAR) method. The thermal vacancy concentration was estimated from the activation enthalpy and entropy data of vacancy formation previously reported for FeAl. It was found that both the lattice parameter and the elastic moduli of FeAl have a linear relationship with temperature even in the temperature range where thermal vacancy concentration rapidly increases (above 400°C), thus suggesting that newly generated thermal vacancies at elevated temperature do not make significant influence on the lattice parameter and the elastic properties of B2-type FeAl.

Original languageEnglish
Title of host publicationIntermetallic-Based Alloys - Science, Technology and Applications
Pages169-175
Number of pages7
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2012 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 25 2012Nov 30 2012

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1516
ISSN (Print)0272-9172

Other

Other2012 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA
Period11/25/1211/30/12

All Science Journal Classification (ASJC) codes

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

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