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Rapid-solidified Magnetostrictive Polycrystalline Strong-Textured Galfenol (Fe-Ga) Alloy and its Applications for Micro Gas-valve

Published online by Cambridge University Press:  01 February 2011

Chihiro Saito ,
Masamune Tanaka ,
Teiko Okazaki  and
Yasubumi Furuya
Chihiro Saito
Affiliation:
chihiro-s@namiki.co.jp, Namiki Precision Jewel Co.,Ltd,, NJC Research Center, Adachi-ku, Tokyo, Japan
Masamune Tanaka
Affiliation:
h06gs223@stu.hirosaki-u.ac.jp, Hirosaki University, Graduate Student, Hirosaki, Japan
Teiko Okazaki
Affiliation:
furuya@cc.hirosaki-u.ac.jpfuruyaoffice@aol.com, United States
Yasubumi Furuya
Affiliation:
furuya@cc.hirosaki-u.ac.jpfuruyaoffice@aol.com, United States
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Abstract

The melt-spun, rapid solidified Galfenol (Fe-Gax, (17≤x≤19)) ribbon sample showed a clear angular dependency on magnetostriction and large magnetostriction (180-200ppm) and good ductility, higher strength etc..as compared with conventional bulk sample. This large magnetostriction is caused by non-precipitating of the ordered phases the release of considerable large internal stresses in as-spun ribbon as well as the remained [100] oriented strong textures after annealing. These are worthy for engineering application as a actuator/sensor devices, therefore, we will introduce the micro-valve which was designed as a device for micro gas-flow control. Bimorph-type FeGa/Ni with the opposite value (FeGa(+),Ni(-)) of magnetostriction coefficient. Large displacement of opposite type could be obtained and it degree and hysteresis curve changed depending the volume fraction of the composite actuator structure.

Keywords

ferromagneticmicrostructuremagnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1129: Symposium V – Materials and Devices for Smart Systems III , 2008 , 1129-V01-03
Copyright
Copyright © Materials Research Society 2009

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References

REFERENCES

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