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Electrochemical Deposition of FeCo Alloys and FeCo/TiO2 Nanocomposites

Published online by Cambridge University Press:  21 March 2011

I. Shao
Affiliation:
Department of Materials Science and Engineering The Johns Hopkins University, Baltimore, MD 21218
P. M. Vereecken
Affiliation:
Department of Materials Science and Engineering The Johns Hopkins University, Baltimore, MD 21218
R. C. Cammarata
Affiliation:
Department of Materials Science and Engineering The Johns Hopkins University, Baltimore, MD 21218
P. C. Searson
Affiliation:
Department of Materials Science and Engineering The Johns Hopkins University, Baltimore, MD 21218
C. L. Chien
Affiliation:
Department of Physics and Astronomy The Johns Hopkins University, Baltimore, MD 21218
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Abstract

Electrochemical deposition of FeCo alloys with 1:1 atomic ratio has proved difficult due to cracking from high stress. By using a sulfamate electrolyte and optimizing other deposition parameters, we successfully electrodeposited high quality FeCo films of 20-25 mm in thickness and 7 mm in diameter. Using a suspension of hard oxide nanoparticles (25 nm TiO2) in the electrolyte, we produced oxide-dispersion-strengthened FeCo/TiO2 nanocomposite films with large grains. Enhanced strength was observed from these nanocomposites relative to pure FeCo alloys as determined from Knoop hardness measurements. In order to further improve the ductility of the alloys, vanadium has been codeposited with FeCo. Some preliminary results of FeCoV alloy deposition are reported.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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References

1. Brenner, Abner, Electrodeposition of Alloys, Academic Press, 1963.Google Scholar
2. Vereecken, P.M., Shao, I., Searson, P.C., J. Electrochem. Soc., 147 (7), 25722575, (2000).10.1149/1.1393570CrossRefGoogle Scholar
3. Shang, C.H., Cammarata, R.C., Weihs, T.P., Chien, C.L., J. Mater. Res. 15(4), 835 (2000).CrossRefGoogle Scholar
4. Bozorth, R.M., Ferromanetism, Institute of Electrical & Electronics, 1983.Google Scholar

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