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Effect of high pressure during the fabrication on the thermal and mechanical properties of amorphous Ni60Nb40 particle-reinforced Al-based metal matrix composites

Published online by Cambridge University Press:  03 March 2011

Peng Yu ,
Shankar Venkataraman ,
Jayanta Das ,
LaiChang Zhang ,
Wenyong Zhang  and
Jürgen Eckert
Peng Yu*
Affiliation:
Division of Materials, School of Engineering, The University of Queensland, Brisbane, Qld 4072, Australia
Shankar Venkataraman
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Postfach 27 01 16, D-01171 Dresden, Germany
Jayanta Das
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Postfach 27 01 16, D-01171 Dresden, Germany
LaiChang Zhang
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Postfach 27 01 16, D-01171 Dresden, Germany
Wenyong Zhang
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Postfach 27 01 16, D-01171 Dresden, Germany
Jürgen Eckert
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Postfach 27 01 16, D-01171 Dresden, Germany
*
a) Address all correspondence to this author. e-mail: yp1975@gmail.com
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Abstract

Ni60Nb40 metallic glass particles, prepared by mechanical alloying, were used to fabricate Al–30 wt% Ni60Nb40 metal matrix composites (MMCs) at 823 K by sintering, hot pressing, and hot extrusion. The Ni60Nb40 reinforcements remained amorphous in all the MMCs fabricated by the different methods. Compression tests revealed that the Young’s modulus and yield strength of the MMCs produced by hot-pressing and hot-extrusion are higher than those for the sintered specimens. Differential scanning calorimeter (DSC) annealing of the as-produced MMCs at 913 K revealed there are severe interfacial reactions between the Al matrix and the Ni60Nb40 reinforcements. The DSC isotherms indicate that the Al matrix reacts faster with Ni60Nb40 in the hot-pressed and hot-extruded MMCs than it does in the sintered material.

Keywords

AlAmorphousComposite

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Type
Articles
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Journal of Materials Research , Volume 22 , Issue 5 , May 2007 , pp. 1168 - 1173
Copyright
Copyright © Materials Research Society 2007

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