Synthesis of Nano-Crystalline RuAl by Mechanical Alloying

Nano-crystalline RuAl was synthesised by mechanical alloying. The evolution of the nano-crystalline RuAl phase during the mechanical alloying process using ruthenium and aluminium powders was studied. During the milling process, the peaks corresponding to reflections from the aluminium planes disapp...

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Bibliographic Details
Published in:Metals and materials international 2007, 13(4), , pp.293-302
Main Authors: Anil Borah, P. S. Robi, A. Srinivasan
Format: Article
Language:Korean
Subjects:
mechanical alloying
microstructure
RuAl
SEM/EDS
XRD
재료공학
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Summary:Nano-crystalline RuAl was synthesised by mechanical alloying. The evolution of the nano-crystalline RuAl phase during the mechanical alloying process using ruthenium and aluminium powders was studied. During the milling process, the peaks corresponding to reflections from the aluminium planes disappeared. The variation of crystallite size and microstrain with milling time was evaluated using X-ray diffraction (XRD) patterns. Though the XRD results showed the formation of a RuAl phase after 7 h of milling, scanning electron microscopy studies revealed that the RuAl phase was formed after 2 h of milling. The analysis revealed that average crystallite sizes of 17 and 120 nm were obtained for RuAl and Ru phases, respectively, during the milling process. Density value of 97 % of the theoretical value was obtained for the milled powder mixture after cold compaction and sintering.
ISSN:1598-9623
2005-4149