Contribution a l'etude du monoxyde de fer solide non-stoechiometrique. Diagramme T-P-X

Vallet, Pierre; Carel, C.

doi:10.1016/0025-5408(79)90213-7

Cited by 19 publications

(14 citation statements)

References 14 publications

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“…The dotted lines represent the boundaries between the three pseudo phases w 1 ¢, w 2 ¢, and w 3 ¢ given by Vallet and Carel. [54] Grabke [10] Meschter and Grabke [38] there is more scatter in the 1123 K (850°C) data in what should be the w 1 ¢ and w 2 ¢ pseudo phases. In the 1268 K (995°C) data, the slopes for the w 1 and w 2 pseudo phases are -0.51 and -0.66, respectively.…”

Section: Pseudo Phases Of Wu¨stitementioning

confidence: 97%

“…The point at which there is a change in the slope of the 1123 K (850°C) data corresponds to the boundary between the w 2 ¢ and w 3 ¢ pseudo phases proposed by Vallet and Carel. [54] However, there does not seem to be a change in slope where the boundary between the w 1 ¢ and w 2 ¢ pseudo phases was proposed. This could be because 8-The effect of the oxygen partial pressure on the apparent rate constant at a temperature of 1268 K (995°C) in the wu¨stite phase field.…”

Section: Pseudo Phases Of Wu¨stitementioning

confidence: 98%

“…The dotted lines represent the boundaries between the three pseudo phases w 1 , w 2 , and w 3 given by Vallet and Carel. [54] Fig. 9-The effect of the oxygen partial pressure on the apparent rate constant at a temperature of 1123 K (850°C) in the wu¨stite phase field.…”

Section: Pseudo Phases Of Wu¨stitementioning

confidence: 99%

“…[12], which can be broken down into the two partial reactions, given by Eqs. [13] and [14]. The experiments conducted dealt with the first of the two partial reactions, as the ingoing gases were carbon monoxide as well as labeled and unlabeled carbon dioxide.…”

Section: B Carbon-13 Experimentsmentioning

confidence: 99%

“…Since the initial work by Vallet et al, the wu¨stite phase field has been probed by many methods to determine whether the pseudo phases exist. Evidence for their existence has been provided by dilatometry, [12][13][14] X-ray diffraction, [12,13,15,16] thermogravimetry, [17][18][19][20][21][22][23][24][25] neutron diffraction, [26] electromotive force, [27,28] and electrical conductivity [29,30] measurements. However, various studies have been conducted that have provided no evidence for the existence of more than one phase in wu¨stite.…”

Section: B Pseudo Phases Of Iron Oxidementioning

confidence: 99%

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Kinetics of the Reaction of CO2/CO Gas Mixtures with Iron Oxide

Worral

Coley

2010

Metall Mater Trans B

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The kinetics of the oxygen exchange reaction between carbon dioxide and carbon monoxide were measured on iron, wu¨stite, and magnetite surfaces. This was done through the use of an isotope exchange technique. The measured rate constants are dependent on the oxygen activity. This dependence is expressed by k a = k o a O Àm . The parameter m was found to have values between 0 and 1. It was found that, in the iron region, the apparent rate constant was independent of the oxygen partial pressure (i.e., m = 0) at 1123 K (850°C) and that it was inversely dependent on the oxygen partial pressure (i.e., m = 1) for the magnetite region at 1123 K (850°C) and 1268 K (995°C). In the wu¨stite region, m was found to be equal to 0.51, 0.66, and 1.0 for the w 1 , w 2 , and w 3 pseudo phases, respectively, at 1268 K (995°C). At 1123 K (850°C), in wu¨stite, m was found to be equal to 0.59 and to 1.0 for the w 1 ¢ and w 3 ¢ pseudo phases, respectively.

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Section: Pseudo Phases Of Wu¨stitementioning

confidence: 97%

Section: Pseudo Phases Of Wu¨stitementioning

confidence: 98%

Section: Pseudo Phases Of Wu¨stitementioning

confidence: 99%

Section: B Carbon-13 Experimentsmentioning

confidence: 99%