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High resolution electron microscopy observation of interfacial structures in NiAl-matrix in situ composites reinforced by TiC particulates

Published online by Cambridge University Press:  31 January 2011

L. G. Yu ,
J. Y. Dai ,
Z. P. Xing ,
D. X. Li ,
J. T. Guo  and
H. Q. Ye
L. G. Yu
Affiliation:
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
J. Y. Dai
Affiliation:
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
Z. P. Xing
Affiliation:
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
D. X. Li*
Affiliation:
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
J. T. Guo
Affiliation:
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
H. Q. Ye
Affiliation:
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
*
a)Address all correspondence to Professor D. X. Li, Laboratory of Atomic Imaging of Solids, Institute of Metal Research, CAS, Shenyang 110015, People's Republic of China.
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Abstract

The structures of interfaces in NiAl-matrix in situ composites reinforced by TiC particulates were studied by means of high-resolution electron microscopy (HREM). No consistent orientation relationship between TiC particles and the NiAl matrix was found. In most cases, TiC particles bonded well to the NiAl matrix free from any interfacial phases. However, in some cases, an interfacial amorphous layer with a thickness of about 3 nm was found. The annealed NiAl–TiC composite showed a good chemical compatibility between the TiC particles and the NiAl matrix, though, some interfacial layers between TiC and NiAl, which were determined to be C-deficient TiC, were found. NiAl precipitates were observed in the TiC particles of the annealed specimens.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 7 , July 1997 , pp. 1790 - 1795
Copyright
Copyright © Materials Research Society 1997

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References

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