Correlations between reaction wave propagation and phase formations in combustion of diluted TiO2-Al-C mixture
Authors: Saw, L.H.1; Rahbari, R.G.2; Hamdi, M.1; Yahya, R.3
Source: Materials Research Innovations, Volume 13, Number 3, September 2009 , pp. 171-175(5)
Publisher: Maney Publishing
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Abstract:
The influence of Al2O3 diluent on quasi-adiabatic combustion synthesis of (3TiO2+4Al+3·5C+yAl2O3) mixture in the presence of oxygen was studied. Assuming adiabatic conditions, maximum temperature of the system for y=0, 0·5, 1·0, 1·5, 2·0, and 2·5 was calculated. Activation energy of reaction kinetics was thermoanalytically determined based on thermogravimetric analysis. Boundary between steady/unsteady wave propagations in self-sustaining (SS) mode of combustion was determined for various amounts of diluents. Existing models proposed in combustion kinetics were used to relate propagation modes of combustion wave to activation energy and conversion rate. The examined model was successfully corresponded to additional phase formations in the product.Keywords: COMBUSTION SYNTHESIS; DILUENT; SELF-SUSTAINING MODE; ACTIVATION ENERGY
Document Type: Research article
DOI: 10.1179/143307509X437536
Affiliations: 1: Department of Engineering Design and Manufacture, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia 2: Department of Engineering Design and Manufacture, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;, Email: rahbarg@gmail.com 3: Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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