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Microscopic Characterization of the Thermal Evolution of Stainless Steel Coatings Sputter-deposited onto WC Particles

Published online by Cambridge University Press:  03 October 2008

C.M. Fernandes ,
A.M.R. Senos  and
M.T. Vieira
C.M. Fernandes
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
A.M.R. Senos
Affiliation:
Department of Ceramics and Glass Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
M.T. Vieira
Affiliation:
ICEMS – Mechanical Engineering Department, Polo 2 of University of Coimbra, 3030-201 Coimbra, Portugal

Abstract

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The hardmetal composites are generally produced from powders of tungsten carbide (WC) and of metal elements, belonging to group 8-10 of the periodic table, which are mixed together by wet milling. News processes, alternatives to milling, have been developed, aiming a higher uniformity of the metallic binder distribution in WC based composites, together with other technological benefits. One of those methods consists of the sputter deposition of metal binder onto the WC powder leading to powder particles coated with the metallic elements. The particles coating showed to be chemically and morphologically very uniform and possesses a nanocrystalline structure and improved surface properties, such as powder's flowability, pressing behaviour, sinterability and thermal reactivity.

Type
Abstract
Information
Microscopy and Microanalysis , Volume 14 , Supplement S3 , September 2008 , pp. 39 - 40
Copyright
Copyright © Microscopy Society of America 2008