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Electrochemical Protection of Molybdenum and Molybdenum Disilicide in Molten Soda-Lime-Silicate Glass Environment

Published online by Cambridge University Press:  25 February 2011

S. Kamakshi Sundaram  and
Robert F. Speyer
S. Kamakshi Sundaram
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA
Robert F. Speyer
Affiliation:
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA
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Abstract

Electrochemical corrosion of Mo and MoSi2 in a molten soda-lime-silicate glass environment was studied using a two electrode cell with Pt as the counter electrode. XRD, SEM, and EDS were used to characterize the corroded specimens. When Mo was given a cathodic bias (∼ 0.8V), the specimen surface oxidized to MoO2(s). With reverse bias, Mo ions were interpreted to have been removed into the glass melt. For MoSi2, Mo5 Si3 interfacial layers were observed for both cathodic and anodic corrosion. Mo5 Si3 debris particles (∼4 µm) were seen floating into the glass en masse under a cathodic bias, but not when the bias was reversed. This was interpreted to be a result of an inherent negative charge of debris particles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 322: Symposium F – High-Temperature Silicides and Refractory Alloys , 1993 , 273
Copyright
Copyright © Materials Research Society 1994

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