Reaction Mechanism of an Al-TiO₂ System

• DOI: 10.4028/www.scientific.net/amr.97-101.1624
• Publication Date: 2010-03-09T14:53:20Z
• Authors: He Guo Zhu; Jing Min; Ying Lu Ai; Qiang Wu
• Keywords: Exothermic reaction; Endothermic process; Volume fraction; Fraction (chemistry)

The reaction mechanism of an Al-TiO2 system is discussed. Thermodynamic analysis indicates that the between Al and TiO2 can occur spontaneously due to negative Gibbs free energy system. When reinforcement volume fraction 30%, there endothermic peak exothermic in DSC curve. But when increases 100%, are two independent peaks height them obviously. With increasing heating rate, ignite temperature becomes higher all move direction. reactions consist steps: first, reacts with form stable α-Al2O3 particles active Ti atoms; second, atoms react Al3Ti.