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In situ synthesis of TiB2/Mg composite by self-propagating high-temperature synthesis reaction of the Al–Ti–B system in molten magnesium
- Source :
-
Journal of Alloys & Compounds . Oct2004, Vol. 379 Issue 1/2, pL4-L7. 0p. - Publication Year :
- 2004
-
Abstract
- The synthesis of in situ formed TiB2/Mg composite utilizing the self-propagating high-temperature synthesis (SHS) reaction that occurred between the molten magnesium and green preforms consisting of Al, Ti and B powders was investigated. The result shows that it is feasible that the smelting temperature of the magnesium matrix alloy is selected at 860 °C, which is slightly higher than the exothermic reaction temperature of 852 °C on the DTA curve, prepared for the SHS reaction in the Al–Ti–B system. An as-cast microstructure of the composite reveals a relatively uniform distribution of TiB2 particulates with hexagonal or rectangular size of ∼2.0 μm. Furthermore, an analysis of the powders extracted from the TiB2/Mg composite confirms that a small amount of blocky TiAl3 phase is also present in the composite. [Copyright &y& Elsevier]
- Subjects :
- *HIGH temperatures
*MAGNESIUM
*ALLOYS
*MICROMECHANICS
Subjects
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 379
- Issue :
- 1/2
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 14313760
- Full Text :
- https://doi.org/10.1016/j.jallcom.2004.02.036