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Knudsen effusion measurements on Cr Mn alloys

Jacob, Thomas K (1985) Knudsen effusion measurements on Cr Mn alloys. In: Zeitschrift für Metallkunde, 76 (6). pp. 415-419.

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The equilibrium partial pressures of Mn over bcc Cr--Mn alloys have been measured using Knudsen cell technique in the temp. range 1200-1500K. The alloys in particulate form were contained in thoria crucibles inside Knudsen cells made of tungsten. The rates of mass loss of each cell under vacuum was monitered as a function of time at constant temp. using a microbalance. Activities exhibit mild negative deviations from Raoult's law, contrary to indications from an earlier study using a fused salt emf technique. The Cr--Mn system is characterized by negative enthalpy and excess entropy of mixing. There is close similarity between the composition dependence of enthalpy and excess entropy. These findings suggest strong vibrational and negligible magnetic contributions to excess entropy of mixing in bcc phase at high temp. 10 ref.--AA

Item Type: Journal Article
Publication: Zeitschrift für Metallkunde
Publisher: Carl Hanser Verlag
Additional Information: Copyright of this article belongs to Carl Hanser Verlag.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 07 Dec 2011 09:24
Last Modified: 07 Dec 2011 09:24
URI: http://eprints.iisc.ac.in/id/eprint/42568

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