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High Temperature Properties of Refractory Intermetallics

Published online by Cambridge University Press:  26 February 2011

D.L. Anton ,
E. Hartford CT ,
D.M. Shah ,
Pratt Whitney  and
E. Hartford CT
D.L. Anton
Affiliation:
United Technologies Research Center
D.M. Shah
Affiliation:
United Technologies Research Center
Pratt Whitney
Affiliation:
United Technologies Research Center
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Abstract

On the basis of creep strength, ultimate tensile strength and oxidation resistance, seven intermetallic compounds with melting temperatures above 1600°C have been selected as possible candidate materials for high temperature structural applications in advanced aero-turbines. These compounds, Nb3Al, Cr3Si, Co2Nb, Cr2Nb, MoSi2, Mo5Si3 and Nb2Al, have been evaluated and their properties reported herein. All seven of the compounds displayed excellent creep resistance at 1200°C with Mo5Si3 and Nb2Al being the strongest. Nb3Al, with the precipitation of the niobium solid solution displayed the greatest low temperature toughness. The greatest ultimate tensile strengths were observed for Co2Nb and MoSi2, while MoSi2 was by far the most oxidation resistant.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 733
Copyright
Copyright © Materials Research Society 1991

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References

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