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A new method for the production of a molybdenum-zirconia cermet

Published online by Cambridge University Press:  31 January 2011

Coral M. Lukaniuk ,
Lorne D. Schwartz  and
Thomas H. Etsell
Coral M. Lukaniuk
Affiliation:
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G6
Lorne D. Schwartz
Affiliation:
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G6
Thomas H. Etsell
Affiliation:
Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G6
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Abstract

A novel method was studied for producing a ceramic-metal matrix composite (cermet) of Mo metal and zirconia powder. The first step was to precipitate dissolved molybdenum from solution onto activated zirconia powder. The molybdenum plated out on the zirconia as molybdenum hydroxide. Next, the coated powders were heated in a tube furnace under hydrogen gas to reduce the molybdenum hydroxide to metallic molybdenum. Finally, the powders were pressed and sintered into cermet pellets. The Mo coatings were 1.5 to 4.2 μm thick and very uniform, enabling the particles to be sintered together. The sintered pellets had superb electrical conductivity (less than 1 ohm of resistance).

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 5 , May 1999 , pp. 1801 - 1804
Copyright
Copyright © Materials Research Society 1999

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References

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