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Formation of eutectic RuAl/Ru nanocomposite by mechanical alloying and subsequent annealing

Published online by Cambridge University Press:  31 January 2011

K. W. Liu ,
F. Mücklich  and
R. Birringer
K. W. Liu*
Affiliation:
Department of Materials Science, Functional Materials, Building 22, Saarland University, P.O. Box 151150, Saarbrücken, D-66041, Germany
F. Mücklich
Affiliation:
Department of Materials Science, Functional Materials, Building 22, Saarland University, P.O. Box 151150, Saarbrücken, D-66041, Germany
R. Birringer
Affiliation:
Department of Physics, Building 43, Saarland University, P.O. Box 151150, Saarbrücken, D-66041, Germany
*
a)Address correspondence to this author.[email protected]
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Abstract

No abrupt reaction was observed during mechanical alloying (MA) of Ru and Al powder mixtures with an eutectic composition (Ru70Al30). As-milled powders constitute mainly a Ru(Al) solid solution and/or mixture (matrix), and a very small quantity of RuAl. The complete reaction between Ru and Al during MA was speculated to be hampered by excess Ru in Ru70Al30. No exothermic heat release was detected in differential scanning calorimetry for as-milled powders. Precipitation of RuAl from as-milled Ru(Al) matrix was observed after annealing at various temperatures. The phase fraction of Ru and RuAl reaches an approximately equilibrium value after annealing at 1173 K.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 16 , Issue 9 , September 2001 , pp. 2459 - 2462
Copyright
Copyright © Materials Research Society 2001

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References

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