Role of Excess Al on the Combustion Reaction in the Al-TiO2-C System
- Authors
- Kim, Je-Woo; Lee, Jung-Moo; Lee, Joon-Ho; Lee, Jae-Chul
- Issue Date
- Nov-2014
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- metal matrix composites; composites; alloys; X-ray diffraction; differential thermal analysis
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.20, no.6, pp.1151 - 1156
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 20
- Number
- 6
- Start Page
- 1151
- End Page
- 1156
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/97002
- DOI
- 10.1007/s12540-014-6020-8
- ISSN
- 1598-9623
- Abstract
- Of various systems that utilize a self-propagating high-temperature synthesis, the Al-TiO2-C system is representative of in-situ production of metal matrix composites reinforced with TiC and Al2O3. Contrary to common understanding, however, the following reaction 4Al + 3TiO(2) + 3C -> 3TiC + 2Al(2)O(3) is infeasible in the Al-TiO2-C system with the given stoichiometric composition of 4Al + 3TiO(2) + 3C. Experiments have shown that the formation of TiC and Al2O3 is feasible only in an Al-TiO2-C system that contains a certain amount of excess Al. In this study, the mechanism of the reactions in the Al-TiO2-C system was elucidated in order to explain why excess Al is needed to promote the formation of TiC and Al2O3. We also estimated the amount of excess Al that is necessary to promote the complete transformation of the Al-TiO2-C powders to TiC and Al2O3.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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