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Oxygen-induced amorphization of metallic titanium by ball milling

Published online by Cambridge University Press:  31 January 2011

Y.Y. Li
Affiliation:
School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
C. Yang*
Affiliation:
School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
W.P. Chen
Affiliation:
School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
X.Q. Li
Affiliation:
School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
M. Zhu
Affiliation:
School of Mechanical Engineering, South China University of Technology, Guangzhou 510640, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Amorphization of metallic titanium by ball milling was presented. With the introduction of continuous pickup of impurities, hexagonally close-packed (hcp) titanium transformed gradually into an amorphous phase without experiencing any intermediate stage of forming a detectable metastable compound phase. The crystallization temperature of the obtained Ti metal glassy phase is about 640 K. The total concentration of the impurities (oxygen, nitrogen, iron, etc.) in the final product of the milled powders that was obtained after 60 h of milling was 10.85 at.%. The amorphization of metallic titanium may account for the combined effects of the pickup oxygen impurity in small amount and the Gibbs–Thompson effect.

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Articles
Copyright
Copyright © Materials Research Society 2007

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References

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