Low-temperature oxidation of Fe-24 wt.%Cr

Young, David J.; Mitchell, D. F.

doi:10.1007/bf00605109

Cited by 12 publications

(4 citation statements)

References 24 publications

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“…6 The results of Young and Mitchell indicated that spinel formation might be more likely for lower oxidation temperatures and oxygen exposures. 7 The formation of a Fe1+XCr 2 .x0 4 -1ike species is also supported on thermodynamic grounds. For example, the reaction FeO + Cr 2 0 3 --+ FeCr 2 0 4 is exothermic, with AGO 9 8 = -19 kcal/mole.…”

Section: Discussionmentioning

confidence: 62%

Interaction of O2 with the Fe0.84Cr0.16(001) surface studied by photoelectron spectroscopy

Lince

Didziulis

Shuh

et al. 1992

Surface Science Letters

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Section: Discussionmentioning

confidence: 62%

Interaction of O2 with the Fe0.84Cr0.16(001) surface studied by photoelectron spectroscopy

Lince

Didziulis

Shuh

et al. 1992

Surface Science Letters

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“…by a previous XPS sputter-depth-profiling study of Fe-Cr alloys with 6-20% Cr that were oxidized at room temperature 9 and by an XPS/SIMS study that included data on a 304 stainless-steel surface exposed to atmosphere at room temperature. 1 5 In addition, a number of studies have provided evidence of Fe1+xCr 2 _xO 4 formation on the surface of Fe-Cr alloys and Cr-containing steels that were heated to temperatures of 200 0 C to 600 0 C during oxidation and studied by AES, 3 " 5,10 XpS,5,15 LEED, 10 RHEED, 7 Raman, 8 SIMS, 15 and M6ssbauer spectroscopy. 6 The results of Young and Mitchell indicated that spinel formation might be more likely for lower oxidation temperatures and oxygen exposures.…”

Section: Discussionmentioning

confidence: 99%

“…6 The results of Young and Mitchell indicated that spinel formation might be more likely for lower oxidation temperatures and oxygen exposures. 7 The formation of a Fe1+XCr 2 .x0 4 4 -like species will be formed. Any excess Fe 3 + would exist as Fe 2 0 3 , as for the higher 02 exposures.…”

Section: Discussionmentioning

confidence: 99%

Interaction of O2 with the Fe0.84Cr0.16(001) surface studied by photoelectron spectroscopy

et al. 1992

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“…Most of the oxidation data in the literature is on high rate 'breakaway' behaviour and in this field surface-sensitive techniques such as XPS (Castle 1977), AES (Hultquist & Leygraf 1982), LEED (Leygraf & Hultquist 1975) and RHEED (Young & Mitchell 1979) have been used to gain information on the early stages of scale formation at low oxygen partial pressure or low oxidation temperatures. Many Fe-Cr-Ni alloys, however, are used in air and low 0 2 partial pressure environments at temperatures between 500 and 600 °C, so that an understanding of the full temporal development of the scale is needed technologically.…”

Section: Introductionmentioning

confidence: 99%

A microstructural study of the oxidation of Fe-Ni-Cr alloys I. protective oxide growth

Newcomb

Stobbs

Metcalfe

1986

Phil. Trans. R. Soc. Lond. A

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The oxidation behaviour of a range of Fe—Ni~Cr alloys has been studied by correlating ‘edge-on’ tem observations of the retained metal—oxide interface with data obtained by conventional low resolution techniques for studying oxidation. Results are presented for ‘protective’ scale formation on three Fe-20Cr—Ni alloys as oxidized at 600 °C in air and in 1 % CO—CO2. The temporal development of thin layers of chromium-rich sesquioxides in air was followed and it was shown that growth occurs by a process essentially dominated by the outward diffusion of chromium. Results obtained by ‘edge-on’ tem demonstrated that decreased chromium gradients in the alloy and higher chromium concentrations at the metal—oxide interface are associated with some inward development of the scale. These minor microstructural changes are paralleled by increases in the rate constants with a tendency towards cube law kinetics. A reverse trend in the mass gain data, as a function of the nickel content of the alloy was characterized for oxidation in 1 % CO-CO2. Despite this, chemically similar oxides are seen to form although carbides were observed beneath the scales on the higher nickel content alloys. Significantly the trend with increasing nickel content was found to be paralleled by an increasing tendency for inward oxide growth. The iron activity in the alloy of lowest nickel content is sufficiently high for chemically unstable behaviour and the formation of duplex oxide nodules. Mechanisms by which simultaneous inward oxidation and carburization can take place during the formation of both chromium-rich sesquioxides and duplex spinel scales are discussed.

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Low-temperature oxidation of Fe-24 wt.%Cr

Cited by 12 publications

References 24 publications

Interaction of O2 with the Fe0.84Cr0.16(001) surface studied by photoelectron spectroscopy

Interaction of O2 with the Fe0.84Cr0.16(001) surface studied by photoelectron spectroscopy

Interaction of O2 with the Fe0.84Cr0.16(001) surface studied by photoelectron spectroscopy

A microstructural study of the oxidation of Fe-Ni-Cr alloys I. protective oxide growth

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