Aluminothermic reaction path in the synthesis of a TiB{sub 2}-Al{sub 2}O{sub 3} composite
- School of Materials Science and Engineering, Georgia Institute of Technology, 30332-0245 (United States)
Differential thermal analysis, in air and argon, in concert with X-ray diffraction, was performed on 2- and 3-component mixtures of Al, B{sub 2}O{sub 3}, and TiO{sub 2}, to foster an understanding of the reaction path involved in the TiB{sub 2}-forming thermite reaction. In argon, aluminum reacted with B{sub 2}O{sub 3} to form elemental boron, and reacted with TiO{sub 2} to form AlTi{sub 3}. These two products reacted just after boron was made available at {approximately}1060{degree}C to form TiB{sub 2}. Formation of Al{sub 18}B{sub 4}O{sub 33} by reaction between B{sub 2}O{sub 3} reactant and Al{sub 2}O{sub 3} product attenuated the yield of TiB{sub 2}, but facilitated its formation by extraction of Al{sub 2}O{sub 3} reaction barriers. {copyright} {ital 1997 Materials Research Society.}
- OSTI ID:
- 528000
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 7 Vol. 12; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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