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Possible influence of quenched-in nuclei on quasicrystal formation in mechanically alloyed Zr57Ti8Nb2.5Cu13.9Ni11.1Al7.5 glassy powder

Published online by Cambridge University Press:  03 March 2011

S. Scudino ,
J. Eckert  and
L. Schultz
S. Scudino*
Affiliation:
IFW Dresden, Institut für Metallische Werkstoffe, D-01171 Dresden, Germany
J. Eckert
Affiliation:
Technische Universität Darmstadt, FB 11 Material- und Geowissenschaften, FG Physikalische Metallkunde, D-64287 Darmstadt, Germany
L. Schultz
Affiliation:
IFW Dresden, Institut für Metallische Werkstoffe, D-01171 Dresden, Germany
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The influence of quenched-in nuclei of icosahedral short range order, proposed as a possible explanation for quasicrystal formation, has been investigated by producing a melt-spun ribbon from previously mechanically alloyed Zr57Ti8Nb2.5Cu13.9Ni11.1Al7.5 glassy powder. A ribbon prepared from highly pure materials forms a quasicrystalline phase during the first stage of the crystallization process, whereas no quasicrystal formation has been detected in the devitrification of the ribbon produced from the mechanically alloyed powder. This finding indicates that the absence of quenched-in nuclei may not be the only reason for the lack of quasicrystal formation in mechanically alloyed powders.

Keywords

Mechanical alloyingMetallic glassQuasicrystal
Type
Rapid Communications
Information
Journal of Materials Research , Volume 19 , Issue 8 , August 2004 , pp. 2211 - 2215
Copyright
Copyright © Materials Research Society 2004

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