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Particulate Intermetallic Matrix Composite Made by One-Step Pulsed Laser Deposition

Published online by Cambridge University Press:  15 February 2011

Li-Chyong Chen ,
Ernest L. Hall  and
Karen A. Lou
Li-Chyong Chen
Affiliation:
General Electric Corporate Research and Development, Schenectady, NY12301
Ernest L. Hall
Affiliation:
General Electric Corporate Research and Development, Schenectady, NY12301
Karen A. Lou
Affiliation:
General Electric Corporate Research and Development, Schenectady, NY12301
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Abstract

A novel way of producing particulate intermetallic matrix composites based on Nb-Al in one step using pulsed laser deposition (PLD) has been investigated. One unique characteristic, inherent to laser ablation, is the generation of particulates. These particulates condense on the substrate and become part of the film. In some cases, such as in high Tc superconducting or optical films applications, it is believed that the presence of particulates diminishes the quality of the films. In this work, we demonstrate that it can be advantageous in some applications to incorporate these particulates into the films.

Nb-Al films were prepared by laser ablation from a Nb3Al target using a 248nm KrF excimer laser at various fluences and substrate temperatures. Transmission (TEM) and scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and Auger electron spectroscopy (AES) were used to characterize the samples. The resultant films consist of a homogeneous matrix with uniformly distributed inclusions. The size of the particles generated by PLD is in the range of a few tens of nanometers to a few microns. EDX shows that the matrix has a composition of Nb7A13 and the particulates contain barely detectable Al. The mechanism of the depletion of Al in the particulates will be discussed. The merit of having a ductile Nb phase embedded in the intermetallic matrix is evident as the cracks generated during TEM sample thinning process propagate in the brittle matrix and finally are arrested at the ductile inclusions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 377
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. Anton, D. L. and Shah, D. M., in Intermetallic Matrix Composites, Anton, D. L. et. al. eds., MRS 194, 45, Pittsburgh, PA (1990).Google Scholar
2. Rowe, R. G. and Skelly, D. W., General Electric, this symposium (1992).Google Scholar
3. Stoloff, N. S. and Alman, D. E., in Intermetallic Matrix Composites, Anton, D. L. et. al. eds., MRS 194, 31, Pittsburgh, PA (1990).Google Scholar
4. Hardwick, D. A. and Cordi, R. C., in Intermetallic Matrix Composites, Anton, D. L. et. al. eds., MRS 194, 65, Pittsburgh, PA (1990).Google Scholar
5. Bhattacharya, R. S., Rai, A. K. and Mendiratta, M. G., in Intermetallic Matrix Composites, Anton, D. L. et. al. eds., MRS 194, 71, Pittsburgh, PA (1990).Google Scholar
6. Cheung, J. T. and Sankur, H., CRC Critical Reviews in Solid State and Materials Sciences, 15 (1), 63 (1988).Google Scholar
7. MRS Bulletin Vol. XVII (2), February issue (1992).Google Scholar
8. Chan, C. L. and Mazumder, J., J. Appl. Phys. 62, 4579 (1987).CrossRefGoogle Scholar
9. Singh, R. and Narayan, J., Phys. Rev. B 41, 8843 (1990).Google Scholar
10. Dupendant, H., Gavigan, J. P., Givord, D., Lienard, A., Rebouillat, J. P. and Souche, Y., Applied Surface Science 43, 369 (1989).CrossRefGoogle Scholar
11. Gavigan, J. P., in The Science and Technology of Nanostructured Magnetic Materials, Proceedings of NATO ASI series, Plenum Publishing Co. (1990).Google Scholar
12. Nachtrieb, N. H., in Liquid Metals, Beer, S. Z. ed., Marcel Dekker Inc., New York (1972).Google Scholar