Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Estimation of the Effect of Grain Boundary Diffusion on Microstructure Development in Magnetite Bi-crystal under Oxygen Chemical Potential Gradient at 823 K

  • Ueda, Mitsutoshi (Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology) ;
  • Maruyama, Toshio (Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology)
  • Received : 2011.12.26
  • Accepted : 2012.01.11
  • Published : 2012.01.31
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Abstract

Mass transport near grain boundary in a magnetite bi-crystal has been estimated at 823 K by finite element method. Mass transport near grain boundary strongly depends on the diffusivities along grain boundary. If grain boundary diffusion has the same oxygen activity dependence as lattice diffusion, there is no mass transport between grains and grain boundary. On the other hand, mass transport between grains and grain boundary is observed in the case that grain boundary diffusion has different oxygen activity dependence.

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References

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