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- Title
EFFECT OF MECHANICAL ACTIVATION ON THE IN SITU FORMATION OF TiB2 PARTICULATES IN THE POWDER MIXTURE OF TiH<sub>2</sub> AND FeB.
- Authors
HUYNH, X.-K.; KIM, B.-W.; KIM, J. S.
- Abstract
The in situ formation of TiB2 particulates via an interface reaction between Ti and FeB powders was studied. The effects of mechanical activation by high-energy milling on the decomposition of TiH2 and the interface reactions between Ti and FeB powders to form TiB2 were investigated. Powder mixtures were fabricated using planetary ball-milling under various milling conditions. The specific ball-milling energy was calculated from the measured electrical power consumption during milling process. High specific milling energy (152.6 kJ/g) resulted in a size reduction and homogeneous dispersion of constituent powders. This resulted in a decrease in the decomposition temperature of TiH2 and an increase in the formation reaction of TiB2 particulates in the Fe matrix, resulting in a homogeneous microstructure of nanoscale TiB2 evenly distributed within the Fe matrix. In contrast, the powder mixture milled with low specific milling energy (36.5 kJ/g) showed an inhomogeneous microstructure composed of relatively large Fe-Fe2B particles surrounded by a thin layer of Fe-TiB2 within a finely dispersed Fe-TiB2 matrix region.
- Subjects
IRON composites; TITANIUM diboride; TITANIUM hydride; MECHANICAL alloying; BALL mills
- Publication
Archives of Metallurgy & Materials, 2017, Vol 62, Issue 2, p1393
- ISSN
1733-3490
- Publication type
Article
- DOI
10.1515/amm-2017-0215