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Amorphization Of Zr-Al Under Mechanical Alloying At Different Temperatures: A Re-Entrant Melting Phenomenon

Published online by Cambridge University Press:  10 February 2011

H. W. Sheng ,
K. Lu  and
E. Ma
H. W. Sheng
Affiliation:
Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803; Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015
K. Lu
Affiliation:
Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803;
E. Ma
Affiliation:
Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803;
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Abstract

Zr100−xAlx powder blends have been subjected to ball milling at different temperatures to investigate the amorphization process. At low temperatures the Zr-Al solid solutions amorphized under the polymorphous constraints, whereas at higher temperatures there was an obvious twophase coexistence region. The Al concentration for the complete amorphization of Zr-Al increased with increasing temperature, suggesting a re-entrant melting behavior. Both of the temperature- and composition-dependent amorphization mechanisms are analyzed in terms of the thermodynamic properties of the phases involved, as well as the dynamic effects brought in by the non-equilibrium milling process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 481: Symposium P – Science and Technology of Semiconductor Surface Preparation , 1997 , 433
Copyright
Copyright © Materials Research Society 1998

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References

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