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The Structure of Rapidly Solidified Powders of Ni3Al and Ni3 Al + B + Ti

Published online by Cambridge University Press:  21 February 2011

I. Baker ,
F. Ichishita  and
E.M. Schulson
I. Baker
Affiliation:
Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755
F. Ichishita
Affiliation:
Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755
E.M. Schulson
Affiliation:
Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755
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Abstract

Powders of stoichiometric Ni3Al and Ni3Al containing boron and titanium were produced by rapid solidification rate (RSR) processing. Most particles were found to be spherical; some had skins and some contained holes. Fractured particles were found, indicating possible brittleness. Particle size distributions were log-normal with an arithmetic mean particle size of 23.5μm. Both alloys exhibited a dendritic structure in which compositional differences were present. In addition, stoichiometric Ni3Al contained interdendritic lamellae. X-ray diffractometry indicated that the powders were only partially ordered.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 28: Symposium F – Rapidly Solidified Metastable Materials , 1983 , 395
Copyright
Copyright © Materials Research Society 1984

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References

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