Subsolidus phase equilibria of the Fe-Ni-O system

Rhamdhani, M. A., Hayes, P. C. and Jak, E. (2008) Subsolidus phase equilibria of the Fe-Ni-O system. Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science, 39 5: 690-701. doi:10.1007/s11663-008-9174-2


Author Rhamdhani, M. A.
Hayes, P. C.
Jak, E.
Title Subsolidus phase equilibria of the Fe-Ni-O system
Journal name Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science   Check publisher's open access policy
ISSN 1073-5615
1543-1916
Publication date 2008-10-01
Year available 2008
Sub-type Article (original research)
DOI 10.1007/s11663-008-9174-2
Open Access Status
Volume 39
Issue 5
Start page 690
End page 701
Total pages 12
Editor David E. Laughlin
Place of publication New York, NY, U.S.A.
Publisher Springer New York LLC
Language eng
Subject C1
0904 Chemical Engineering
84 Mineral Resources (excl. Energy Resources)
0912 Materials Engineering
Formatted abstract
The phase equilibria of the Fe-Ni-O system in the temperature range between 800 °C and 1600 °C, at various oxygen partial pressures, in the subsolidus region, have been experimentally studied using equilibration and quenching techniques followed by electron-probe X-ray microanalysis (EPMA). The pseudo-binary 'Fe2O3'-NiO phase diagram in air and isothermal Fe-Ni-O phase diagrams at low oxygen partial pressures, at temperatures between 1000 °C and 1200 °C, have been constructed. In the conditions studied, it was found that the solubilities of iron in bunsenite-(Ni, Fe)O and solubilities of nickel in wustite-(Fe, Ni)O phases are higher than reported in the previous studies. It is suggested that the improved experimental techniques used in the present study ensure the achievement of the true equilibrium state in the system. The isothermal ternary phase diagrams of FeO-NiO-Fe2O3 at 1000 °C, 1100 °C, and 1200 °C, modeled using FactSage, have also been presented. The present work has provided new phase equilibria data in the Fe-Ni-O system, as well as provided the basis for further experimental studies and for development of thermodynamic models of higher order complex such as Fe-Ni-X-O (X = Mg, Al, Cr), important to improve extraction of Ni from nickel laterite ores.
© The Minerals, Metals & Materials Society and ASM International 2008
Keyword Phase equilibrium
Fe-Ni-O system
Subsolidus region
Nickel laterite ores
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Sat, 18 Apr 2009, 00:41:24 EST by Gail Smith on behalf of Mining and Minerals Process Engineering