Mechanisms of porous iron growth on wustite and magnetite during gaseous reduction

Matthew, S. P., Cho, T. R. and Hayes, P. C. (1990) Mechanisms of porous iron growth on wustite and magnetite during gaseous reduction. Metallurgical Transactions B, 21 4: 733-741. doi:10.1007/BF02654252


Author Matthew, S. P.
Cho, T. R.
Hayes, P. C.
Title Mechanisms of porous iron growth on wustite and magnetite during gaseous reduction
Journal name Metallurgical Transactions B
ISSN 0360-2141
1543-1916
Publication date 1990-01-01
Sub-type Article (original research)
DOI 10.1007/BF02654252
Open Access Status Not yet assessed
Volume 21
Issue 4
Start page 733
End page 741
Total pages 9
Place of publication New York, NY, United States
Publisher Springer
Abstract The iron/iron oxide interface morphologies formed during the reduction of dense wustite and magnetite samples have been examined using scanning electron microscopy. Under conditions where porous iron products are obtained, a range of structures, which depend critically on the gas composition, reaction temperature, and bulk oxide composition, may be formed at the inter-face during reduction. Three principal mechanisms of porous iron growth have been identified: (1) a continuous coupled reaction, involving cooperative pore and iron growth, (2) a continuous dendritic growth mechanism, in which pores advance ahead of the iron formation, and (3) a discontinuous mechanism, involving the successive formation and breakdown of dense iron lay-ers on the oxide surface. The reaction mechanisms are explained in terms of the relative mag-nitudes of the various chemical reactions and mass transport processes which occur during the decomposition of the solids.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Thu, 14 Jan 2016, 22:10:53 EST by Vicki Thompson on behalf of School of Chemical Engineering