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Characterization of Vacuum Plasma Sprayed Mechanofused NiAl
Published online by Cambridge University Press: 01 January 1992
Abstract
Vacuum plasma spray is a melt spray process capable of producing coatings or near-net shaped deposits with ultra-fine grained structures. Mechanofusion is a novel technique for processing powdered materials. In this study, mixtures of elemental Ni and Al powders, either blended or mechanofused, were vacuum plasma sprayed, yielding a series of Ni-Al intermetallic phases. Mechanofusion resulted in significant effects on the phase distribution in subsequently as-sprayed deposits. After heat treatment at 1100 °C, single phase NiAl was obtained for both the mechanofused and blended samples. The microhardness of the NiAl is comparable to that produced by other methods. These preliminary experiments indicate that mechanofusion and vacuum plasma spraying can be employed to produce various compounds using mixed elemental powders.
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- Copyright © Materials Research Society 1995
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