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Spinodal Decomposition in Fe(1-X)O-Fe3o4 Sintered Ceramics.

Published online by Cambridge University Press:  02 July 2020

A. Huerta ,
H. A. Calderon ,
M. Umemoto  and
M. E. Brito
A. Huerta
Affiliation:
Instituto Politecnico Nacional, UPALM Ed. 9, Apdo. Postal 75-707, MexicoD.F. 07338. [email protected]
H. A. Calderon
Affiliation:
Instituto Politecnico Nacional, UPALM Ed. 9, Apdo. Postal 75-707, MexicoD.F. 07338. [email protected]
M. Umemoto
Affiliation:
Toyohashi University of Technology, Toyohashi441 Aichi, Japan.
M. E. Brito
Affiliation:
National Industrial Research Institute of Nagoya, Nagoya, Japan.
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Extract

Ceramic materials in the system FeO-Fe3o4 have been produced by means of mechanical milling and sintering for application of their physical properties. Starting from powder mixtures of Fe and Fe3o4 or Fe and Fe2o4, as well as pure Fe3o4, a metastable solid solution of Fe and O has been produced. The amount of Fe dissolved varies according to the milling time and its initial content in the mixture. A protective Ar atmosphere is used in all stages of the milling process in order to avoid contamination. X-ray diffraction patterns show a clear displacement of the intensity maxima as a function of the milling time, suggesting the formation of a solid solution from the initial mixture. Use of Mossbauer spectroscopy reveals an increasingly higher amount of metastable wustite (Fe(1-X) as a function of milling time i.e., 500 h and 1000 h of milling produce 67 and 74 mol % Fe(1-X)O, respectively.

Type
Phase Transformations
Information
Microscopy and Microanalysis , Volume 6 , Issue S2: Proceedings: Microscopy & Microanalysis 2000, Microscopy Society of America 58th Annual Meeting, Microbeam Analysis Society 34th Annual Meeting, Microscopical Society of Canada/Societe de Microscopie de Canada 27th Annual Meeting, Philadelphia, Pennsylvania August 13-17, 2000 , August 2000 , pp. 366 - 367
Copyright
Copyright © Microscopy Society of America

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