On the Concentration of Iron Dissolved in Magnesium

Authors: Mitrovic-Scepanovic, V.; Packwood, R. H.; Carpenter, G. J. C.; Brigham, R. J.

Source: Canadian Metallurgical Quarterly, Number 1, January-March 1994 , pp. 61-65(5)

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Abstract:

Electronprobe microanalysis of the magnesium matrix in a series of Mg-Fe alloys was used to measure the concentration of Fe in solid solution in Mg. The “solubility limit” was found to be approximately 55 ppm (by weight) at 400°C and 28 ppm at 500°C. Thermodynamic evaluation of these data suggests that the equilibrium has. been established with a phase other than high-purity αFe and semiquantitative analysis by transmission electron microscopy has confirmed that the precipitates are Fe containing dissolved Si.

Résumé

La micro analyse par sonde électronique d'une mat rice de magnésium a été utilisée sur une série d'alliages Mg–Fe pour mesurer la concentration de Fe en solution solide dans le magnésium. La limite de solubilité se situe environ à 55 ppm (poids) à 400°C et 28 ppm à 500°C. L'évaluation thermodynamique de ces données suggère que l'équilibre s'est établi, laissant une phase autre que le fer-α de haute pureté, et l'analyse semi-quantitative par microscopie électronique en transmission a confirmé que les précipités sont formés de fer con tenant du silicium dissous.

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/000844394795539334

Publication date: 1994-01-01

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On the Concentration of Iron Dissolved in Magnesium

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