The Role of Rare Earths and Reactive Elements in High-Temperature Oxidation Behavior of Fe&amp;ndash;20Cr Alloy

Nagai, Hiroshi; Murai, Teruyuki; Mitani, Hiroyasu

doi:10.2320/matertrans1960.20.299

Cited by 16 publications

(2 citation statements)

References 30 publications

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“…A similar result was obtained in the oxidation of and Fe-20Cr alloys with the addition of rare earths in the metallic form (22) (23). These results strongly suggest that the solubility of NiO or the diffusivity of Ni ions in Cr2O3 may be changed due to the introduction of rare earths.…”

supporting

confidence: 71%

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni–15Cr Sintered Alloy

et al. 1983

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supporting

confidence: 71%

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni–15Cr Sintered Alloy

et al. 1983

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“…The change of oxidation mode can affect the mobility of ionic species in the scale. The addition of reactive elements in the Cr 2 O 3 -forming alloys can change scale growth mechanism from predominantly outward metal transport to predominantly inward oxygen transport [25,26]. Tsai has reported that the presence of reactive element, yttrium in Cr 2 O 3 scales, slightly decreases the grain boundary diffusivity of Cr, but enhances the oxygen lattice diffusion [26].…”

Section: 5mentioning

confidence: 99%

Effect of Ti addition on the electric and ionic property of the oxide scale formed on the ferritic stainless steel for SOFC interconnect

Seo¹,

Yun²

2012

International Journal of Hydrogen Energy

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Effect of small concentrations of zirconium on high temperature oxidation behaviour of Fe-15 Cr-4 Al

1985

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Effect of 1% Zr on oxidation behaviour of Fe‐15 Cr‐4 Al alloy under isothermal conditions in air, O2 and O2‐10% H2O environments in the temperature range 1000–1150°C was investigated. The effect of zirconium concentration was studied at 1 200°C in air. Oxidation rate increases with increase in zirconium concentration. Parabolic rate of oxidation was observed. Limited study on cyclic oxidation was carried out at 1150°C in air. The cycle consisted of one hour holding at isothermal temperature followed by half an hour air cooling. The oxidised samples were examined by X‐Ray diffractometry, SEM, EDAX. Extensive spalling was observed in the base alloy, Fe‐15 Cr‐4 Al in all environments. Zirconium additions eliminated the spalling of the scale. The EDAX analysis of a spalled region shows the presence of iron and chromium while the unspalled region is aluminium rich. A common structural feature, localised formation of granules/nodules was observed in the scale of zirconium containing alloys in all the environments. The number of granules increased with increase in zirconium concentration and was observed to be a maximum in 1% Zr and also increases with increasing temperature. The observations reveal that 1% Zr alloy shows lower oxidation rate in O2‐H2O environment under isothermal conditions. X‐Ray diffraction analysis shows the additional presence of Fe2O3 and Cr2O3 in α‐Al2O3 scale which have not been detected in the α‐Al2O3 scale formed in other environments, air and O2. 0.2% Zr is most effective in increasing oxidation resistance of Fe‐15 Cr‐4 Al alloy both under isothermal and cyclic oxidation conditions.

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The Role of Rare Earths and Reactive Elements in High-Temperature Oxidation Behavior of Fe–20Cr Alloy

Cited by 16 publications

References 30 publications

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni–15Cr Sintered Alloy

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni–15Cr Sintered Alloy

Effect of Ti addition on the electric and ionic property of the oxide scale formed on the ferritic stainless steel for SOFC interconnect

Effect of small concentrations of zirconium on high temperature oxidation behaviour of Fe-15 Cr-4 Al

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The Role of Rare Earths and Reactive Elements in High-Temperature Oxidation Behavior of Fe&ndash;20Cr Alloy

Cited by 16 publications

References 30 publications

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni&ndash;15Cr Sintered Alloy

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni&ndash;15Cr Sintered Alloy

Effect of Ti addition on the electric and ionic property of the oxide scale formed on the ferritic stainless steel for SOFC interconnect

Effect of small concentrations of zirconium on high temperature oxidation behaviour of Fe-15 Cr-4 Al

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The Role of Rare Earths and Reactive Elements in High-Temperature Oxidation Behavior of Fe–20Cr Alloy

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni–15Cr Sintered Alloy

Effect of Rare Earth Oxide Dispersion on the Oxidation of Ni–15Cr Sintered Alloy