日本金属学会誌

J. Japan Inst. Metals, Vol. 54, No. 4 (1990),
pp. 357-361

Interface Structure in Sintered Fe-FeO Powder Studied by High Resolution Electron Microscopy

Kimiko Sakata1 and Kazuyuki Ogawa2

1Faculty of Science, Science University of Tokyo, Tokyo
2National Research Institute for Metals, Tokyo

Abstract:

A structure of Fe/FeO interface in a sintered iron and wüstite powder mixture with the composition of Fe-30 mol%FeO was investigated by high resolution electron microscope. The present results were discussed in relation to these of composition analysis already obtained by Auger electron spectroscopy and X-ray photoelectron spectroscopy for the oxidized iron crystal. At the interface (111)Fe/(110) FeO a transition region with oxygen deficiency is formed, which has a distorted cubic structure of Fed. The structure with oxygen deficiency is formed by the diffusion of excess oxygen from wüstite into the Fe-phase and plays an essential role in joining both phases.


(Received 1989/10/16)

Keywords:

interface structure, super structure, sintered iron and wüstite, high-resolution electron microscope, optical diffraction, X-ray analysis


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