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On the Microstructure of a Ni3Al/SiC/TiB2 Intermetallic Matrix Composite Processed by Spray Atomization and Co-Deposition

Published online by Cambridge University Press:  15 February 2011

X. Liang  and
E. J. Lavernia
X. Liang
Affiliation:
Materials Science and Engineering, Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92717.
E. J. Lavernia
Affiliation:
Materials Science and Engineering, Department of Mechanical and Aerospace Engineering, University of California, Irvine, CA 92717.
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Abstract

This work reports on the microstructure of a particulate reinforced nickel aluminide composite synthesized by spray atomization and co-deposition. This synthesis methodology involved using high energy inert gas to disintegrate the nickel aluminide matrix (IC-396) into a Gaussian distribution of micrometer-sized, semi-solid droplets while simultaneously co-injecting SiC and TiB2 particulates, followed by deposition onto a water cooled substrate. The microstructure of the as-spray deposited composite material consisted of a mixture of the ordered γ (Ni3Al) and the disordered γ (Ni-rich) phase with a homogeneous distribution of SiC and TiB2 particulates. Scanning electron microscopy, combined with Energy Dispersive X-ray Spectroscopy were used to provide insight into the reactions taking place in the interfacial zone. The results of the present study show that a well defined reaction zone was formed at the Ni3Al/TiB2 interface; whereas extensive reaction occurred between the SiC particulates and matrix, resulting in complete transformation of almost all SiC particulates into other carbide phases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 229: Symposium Q – Structure/Property Relationships for Metal/Metal Interfaces , 1991 , 239
Copyright
Copyright © Materials Research Society 1991

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