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Thermoelastic Properties of Super High Temperature Ru-Ta Shape Memory Alloy

Published online by Cambridge University Press:  21 March 2011

Y. Furuya  and
H. Zhirong
Y. Furuya
Affiliation:
Department of Intelligent Machines and System Engineering, Hirosaki University, Hirosaki 036–8152, Japan
H. Zhirong
Affiliation:
Visiting Professor of Hirosaki University, and at present, Department of Material Science and Engineering, Shaanxi Institute of Technology, Shaanxi, China
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Abstract

Equiatomic Ru-Ta alloy can show a thermoelastic phase transformation at super high temperatures above 1000°C. The temperature of shape memory effect of this alloy seems to be remarkably higher by two times than those of the formerly reported high temperature NiMnAl alloy and it seems very interesting as one of the new high temperature SMAs, however, detailed thermoelastic properties of Ru-Ta system alloy have not been clarified. The present paper investigates the basic material properties of Ru-Ta alloy, i.e. each transformation temperature, temperature hysteresis range, heat absorption by DSC measurement and metallurgical compounds by X-ray diffraction that depend on alloy composition by changing the Ru content from 46–5 4at%. Effect of heat treatment at solution temperature and aging temperature on thermoelastic phase transformation points is investigated and the thermal cyclic stability is also studied for engineering applications as high temperature actuator/sensor materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 646 , 2000 , N5.30.1
Copyright
Copyright © Materials Research Society 2001

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References

REFERENCES

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