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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ACKNOWLEDGMENTS
This work was supported by the National Science Fund of China for Distinguished Young Scholar (No. 50325516), the Science and Technology Program of Guangdong Province (No. 59872024), China Postdoctoral Science Foundation (No. 20060390198), and Postdoctoral Innovation Foundation of South China University of Technology (No. 05243). The authors are very grateful to Prof. S. Li, Dr. L.Z. Ouyang, and Prof. Y.Z. Liu for their helpful discussions and to Miss X.P. Zeng for her technical assistances in the XRD measurements.
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Li, Y., Yang, C., Chen, W. et al. Oxygen-induced amorphization of metallic titanium by ball milling. Journal of Materials Research 22, 1927–1932 (2007). https://doi.org/10.1557/jmr.2007.0243
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DOI: https://doi.org/10.1557/jmr.2007.0243