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The Synthesis and Evaluation of Nb3Al-Nb Laminated Composites

Published online by Cambridge University Press:  15 February 2011

R. G. rowe
Affiliation:
GE Corporate Research and Development, Schenectady, NY 12309
D. W. Skelly
Affiliation:
GE Corporate Research and Development, Schenectady, NY 12309
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Abstract

Microlanminates of Nb3Al and Nb were synthesized in-situ by high rate magnetron sputtering. Three composites were fabricated. They had thicknesses ranging from 19 to 146 μm (5.5 mils) with 11 to 91 layers. The volume fraction of the Nb lamellae was approximately 0.4 for two and 0.5 for the third. Room temperature fracture of the composites revealed that some cleavage cracking in the Nb3Al intermetallic layers was arrested by the ductile Nb layer. The Nb layers failed by chisel point fracture and shear.

Type
Research Article
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. Fleischer, R.L., “Mechanical Properties of Diverse High-Temperature Compounds – Thermal Variation of Microhardness and Crack Formation”, Mat. Res. Soc. Symp. Proc., 133, 305310, (1989).CrossRefGoogle Scholar
2. Déve, H.E., Evans, A.G., Odette, G.R., Mehrabian, R., Emiliani, M.L. and Hecht, R.J., “Ductile Reinforcement Toughening of Gamma-TiAl: Effects of Debonding and Ductility”, Acta Metall. Mater, 38, 14911502, (1990).Google Scholar
3. Sigl, L.S., Mataga, P.A., Dalgliesh, B.J., McMeeking, R.M. and Evans, A.G., “On the Toughness of Brittle Materials Reinforced with a Ductile Phase”, Acta Metail. Mater, 36, 945953, (1988).CrossRefGoogle Scholar
4. Cao, H.C. and G, A. Evans,, “On Crack Extension in Ductile/Brittle Laminates”, Acta Metall. Mater, 39, 29973005, (1991).Google Scholar
5. Anton, D.L. and Shah, D.M., “Ductile Phase Toughening of Brittle Intermetallics”, Mat. Res. Soc. Symp. Proc., 194, 4552, (1990).Google Scholar
6. Anon, ., “Commercially Pure Nb”, in Aerospace Structural Metals Handbook., MCIC, Battelle Columbus Laboratories: Columbus, OH, 43201. 1985, p. 4.Google Scholar
7. Conrad, H., “Effect of Interstitial Solutes on the Strength and Ductility of Titanium”, Progress in Materials Science, 26, 123403, (1981).Google Scholar
8. Bhattacharya, R.S., Rai, A.K., and Mendiratta, M.G., “Tailored Microstructures of Niobium-Niobium Silicides by Physical Vapor Deposition”, Mat. Res. Soc. Symp. Proc., 194, 7178, (1990).Google Scholar
9. Hardwick, D.A. and Cordi, R.C., “Intermetallic Matrix Composites by Physical Vapor Deposition”, Mat. Res. Soc. Symp. Proc., 194, 6570, (1990).CrossRefGoogle Scholar
10. Bunshah, R.F., Deposition Technologies for Films and Coatings, pp. 140143. 1982, Park Ridge, NJ, Noyes Publications.Google Scholar
11. Bannister, M. and Ashby, M.F., “The Deformation and Fracture of Constrained Metal Sheets”, Acta Metall. Mater., 39, 25752582, (1991).Google Scholar
12. Evans, A.G., Rifhle, M., Dalgliesh, B.G. and Charalambides, P.G., “The Fracture Energy of Bimaterial Interfaces”, Met. Trans. A, 21A, 24192429, (1990).CrossRefGoogle Scholar