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Identification and characterization of (Ti, Cu, A1)6N, a new η nitride phase

Published online by Cambridge University Press:  31 January 2011

A. H. Carim
A. H. Carim
Affiliation:
Department of Chemical and Nuclear Engineering and Center for Micro-Engineered Ceramics, University of New Mexico, Albuquerque, New Mexico 87131
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Abstract

In the interfacial reaction zone between AlN and a Ag Cu–Ti braze alloy, a previously unreported phase belonging to the η family (M6X) has been found by transmission electron microscopy. The compound has an approximate stoichiometry of (Ti3−x Cu3−xAl2x)N and space group symmetry of Fd3m, with a cubic lattice parameter of a0 = 1.13 ± 0.02 nm. Large (>1 μm diameter), defect-free grains are present with occasional {111} twinning. Grain boundaries are free of second phases and amorphous interlayers. The formation of continuous layers that grow with reaction time indicate possible stability of the η nitride at 900 °C. The presence of this phase is integral to the chemical and structural development of the ceramic-metal interface.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 6 , December 1989 , pp. 1456 - 1461
Copyright
Copyright © Materials Research Society 1989

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References

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