Determination of the kinetics of TiAl3 formation from fine Ti and Al particles using differential scanning calorimetry
作者： X. Wang , H.Y. Sohn , M.E. Schlesinger
DOI: 10.1016/0921-5093(94)90314-X
关键词: Chemical kinetics 、 Differential scanning calorimetry 、 Thermodynamics 、 Materials science 、 Melting point 、 Physical chemistry 、 Reaction rate constant 、 Exothermic reaction 、 Rate equation 、 Activation energy 、 Atmospheric temperature range
摘要: Abstract Differential scanning calorimetry was applied to the study of high temperature kinetics TiAl 3 formation from constituent metal powders. The reaction proceeds at a measurable rate above melting point aluminum. effects various experimental parameters on were determined. heating affects exothermic temperature. In range 690–740°C, equation obeys Prout-Tompkins and activation energy pre-exponential factor are 149 kJ mol −1 1.2×10 6 s respectively. 750–900°C, second-order with an 517 1.9×10 23 . These represent true intrinsic values because they directly determined by eliminating any heat transfer effects.
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