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Title of Journal: Oxid Met

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Abbravation: Oxidation of Metals

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Springer US

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1573-4889

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The Mechanism of Phase Transformation in Thermally

Authors: Shigenari Hayashi Kouhei Mizumoto Suzue Yoneda Yasumitsu Kondo Hiroshi Tanei Shigeharu Ukai
Publish Date: 2013/08/29
Volume: 81, Issue: 3-4, Pages: 357-371
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Abstract

The isothermal phase transformation behavior of thermally grown oxide scale of FeO which was formed on Fe at 700 °C in air for 16 min was investigated at 320 450 500 520 and 560 °C in air The phase transformation of FeO was found to consist of four transformation modes 1 growth of outer Fe3O4 layer 2 precipitation of Fe3O4 3 formation of magnetite seam and 4 eutectoid decomposition of FeO The transformation was always completed by the eutectoid decomposition at all temperatures in the present study however the proportion of transformation mode 1 and 2 strongly depended on temperature At higher temperatures growth of the outer Fe3O4 layer initially predominates but the precipitation of Fe3O4 controls the initial transformation at lower temperature before the eutectoid reaction The eutectoid reaction was found to be initiated by Fe nucleation from Fesaturated FeO Fe saturation in FeO was due to growth and/or precipitation of Fe3O4 and formation of the magnetite seam layer which acts as a diffusion barrier for Fe inward diffusion into Fe substrate It was proposed that these transformation modes growth and/or precipitation of Fe3O4 and magnetite seam formation are necessary to begin the eutectoid reaction ie completion of FeO scale transformation

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Other Papers In This Journal:
  1. Beneficial Effect of Pt and of Pre-Oxidation on the Oxidation Behaviour of an NiCoCrAlYTa Bond-Coating for Thermal Barrier Coating Systems
  2. Improving the Physicochemical Properties of Fe–25Cr Ferritic Steel for SOFC Interconnects via Y-Implantation and Y 2 O 3 -Deposition
  3. Oxidation of Heat-resistant Alloys
  4. Corrosion of Three Commercial Steels Under ZnCl 2 –KCl Deposits in a Reducing Atmosphere Containing HCl and H 2 S at 400–500°C
  5. Evaluation of High Temperature Corrosion in Simulated Waste Incinerator Environments
  6. An Improved Treatment of the Kinetics of Coupled Internal Oxidation by a Single Oxidant of the Two Most-Reactive Components of Ternary Alloys and of the Conditions for the Transition to Their External Oxidation
  7. An Improved Treatment of the Kinetics of Coupled Internal Oxidation by a Single Oxidant of the Two Most-Reactive Components of Ternary Alloys and of the Conditions for the Transition to Their External Oxidation
  8. Comparative Study on High Temperature Oxidation of T92 Steel in Dry and Wet Oxyfuel Environments
  9. Quantification of Adherence of Thermal Oxide Scale on Low Carbon Steel Using Tensile Test
  10. The Effect of Different SO 2 /SO 3 Catalytic Media on High-Temperature Corrosion Processes (Hot Corrosion, Fireside Corrosion, Sulfidation–Oxidation)
  11. Isothermal Oxidation Behavior of Ti-50Al Alloy with Y Additions at 800 and 900°C
  12. Isothermal Phase Diagrams of Binary Alloys and Two Oxidants
  13. Corrosion of Cr 2 AlC in Ar/1%SO 2 Gas Between 900 and 1200 °C
  14. Photoelectrochemistry of Oxidation Layers: A Novel Approach to Analyze Photocurrent Energy Spectra
  15. Influence of Chromium Carbides on the High Temperature Oxidation Behavior and on Chromium Diffusion in Nickel-Base Alloys
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