Diffusion Rates of51Cr,54Mn and 59Fe in MnCr2O4 and FeCr2O4 Spinels

Jolanta Gilewicz-Wolter; Zbigniew Żurek; J Dudala; Jerzy Lis; Martah Homa; Marcin Wolter

doi:10.4028/www.scientific.net/AST.46.27

Paper Titles

Studies by In Situ and Real-Time Synchrotron Imaging of Interface Dynamics and Defect Formation in Solidification Processing
p.1

Electric Field-Induced Unmixing in Mixed Ferrite Spinel (Co,Fe)₃O₄
p.11

Electron Transport and Dielectric Breakdown Kinetics in Pr₂O₃High K Films
p.21

Diffusion Rates of⁵¹Cr,⁵⁴Mn and ⁵⁹Fe in MnCr₂O₄ and FeCr₂O₄ Spinels
p.27

Phase Transformations and Interstitial Atom Diffusion in Iron-Nitride, Iron-Carbonitride and Iron-Carbide Layers
p.32

Contribution to the Theory of Demixing of Yttrium in Yttria-Stabilized-Zirconia in an Electric Field
p.42

Computer Modelling of Oxygen Mobility at Ceria Surfaces and the Construction of Ceria Nanotube Models
p.48

Extraction of Diffusion Correlation Information from Tracer, Interdiffusion and Ionic Conductivity Data
p.54

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 46Diffusion Rates of51Cr,54Mn and 59Fe in MnCr2O4...

Diffusion Rates of⁵¹Cr,⁵⁴Mn and ⁵⁹Fe in MnCr₂O₄ and FeCr₂O₄ Spinels

Abstract:

As the result of oxidation of Cr-Mn steels in SO2 the three layer scale is formed. The intermediate layer of this scale is composed mainly of MnCr2O4 spinel whereas FeCr2O4 spinel is present in small amount. MnO dominates in the outer layer. The inner, very thin scale layer contains oxides/sulfides mixture. The aim of this study was to examine self-diffusion processes in both spinels by multitracer method of diffusion measurements to know which of the transport processes during oxidation is the smallest one and deciding on the corrosion rate. In diffusion experiments the radioisotopes 54Mn, 51Cr and 59Fe were used. The serial sectioning method was applied to simultaneous evaluation of diffusion rates of chromium, manganese and iron in both spinels at 1073 K and 1173 K under the pressure of 105 Pa in SO2 containing 10 Pa O2. These spinels were obtained by modified sol-gel method from nitrates. Structures of the spinels were examined by X-ray spectrometry. It was found, that the diffusion rates of metals are higher in MnCr2O4 spinel. Moreover the dominant mechanism of manganese transport (the highest one) in studied samples is the volume diffusion while chromium and iron are transported mainly through the high diffusivity paths.

You might also be interested in these eBooks

Mass and Charge Transport in Inorganic Materials III

View Preview

Info:

Periodical:

Advances in Science and Technology (Volume 46)

Pages:

27-31

DOI:

https://doi.org/10.4028/www.scientific.net/AST.46.27

Citation:

Cite this paper

Online since:

October 2006

Authors:

Jolanta Gilewicz-Wolter, Zbigniew Żurek, J Dudala, Jerzy Lis, Martah Homa, Marcin Wolter

Keywords:

Calculation of Diffusion Coefficient, Multitracer Method, Oxidation, Reactive Diffusion, Spinel

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] Z. Żurek, J. Gilewicz-Wolter, M. Hetmańczyk, J. Dudała, A. Stawiarski: Oxid. Met. Vol. 64, Nos. 516 (2005), p.379.

DOI: 10.1007/s11085-005-8533-5

Google Scholar

[2] S.H. Song, Z.X. Yuan: Journal of Materials Science Letters, Vol. 22 (2003), p.755.

Google Scholar

[3] P. Papaiacovou, H.J. Grabke, M. Danielewski, H.P. Schmidt: Reactivity of Solids Vol. 8, (1990), p.147.

Google Scholar

[4] S.J. Rothman: The Measurements of Tracer Diffusion Coefficients in Solids, in G.E. Murch, A.S. Nowick (Eds), Diffusion in Crystalline Solids (Academic Press, New York 1984).

DOI: 10.1016/b978-0-12-522662-2.50006-6

Google Scholar

[5] P.G. Shewmon: Diffusion in Solids (McGraw-Hill Book Company, Inc., New York 1963).

Google Scholar

[6] I. Kaur, W. Gust: Fundamentals of Grain and Interphase Boundary Diffusion (Ziegler Press, Stuttgart 1988).

Google Scholar

[7] J. Gilewicz-Wolter, M. Wolter: Solid State Communications, Vol. 117, (2001), p.719.

DOI: 10.1016/s0038-1098(01)00024-2

Google Scholar

[8] N.L. Peterson, W.K. Chen: J. Phys. Chem. Solids, Vol. 43, (1982), p.29.

Google Scholar

[9] A.C.S. Sabioni, B. Lesage, A.M. Huntz: Philos. Mag. A Vol. 66, No 3 (1992), p.333.

Google Scholar

[10] W.K. Chen, N.L. Petersen: J. Phys. Chem. Solids, Vol. 36, (1975), p.1097.

Google Scholar

[11] J.H. Lee, M. Martin, H.I. Yoo: J. Phys. Chem. Solids, Vol. 61, (2000), p.1597.

Google Scholar