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Morphological and structural evolutions of nonequilibrium titanium-nitride alloy powders produced by reactive ball milling

Published online by Cambridge University Press:  31 January 2011

M. Sherif El-Eskandarany ,
K. Sumiyama ,
K. Aoki  and
K. Suzuki
M. Sherif El-Eskandarany
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980, Japan
K. Sumiyama
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980, Japan
K. Aoki
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980, Japan
K. Suzuki
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980, Japan
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Abstract

Nonequilibrium titanium-nitride alloy powders have been fabricated by a high energetic ball mill under nitrogen gas flow at room temperature and characterized by means of x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and differential scanning calorimetry. Initial hcp titanium is completely transformed to nonequilibrium-fcc Ti–N after 720 ks of the milling time. The fcc Ti–N phase is stable at relatively low temperature and transforms at 855 K to Ti2N and δ phases. At the final stage of milling, the particle- and grain-sizes of alloy powders are 1 mm and 5 nm, respectively, and the lattice parameter is 0.419 nm.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 4 , April 1992 , pp. 888 - 893
Copyright
Copyright © Materials Research Society 1992

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