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| Thermodynamic analysis and reaction kinetic for the preparation of aerospace-grade AlV85 master alloy |
| YUAN Zikai 1，HUANG Zhaokuo 1，YU Jiyang 1，TENG Aijun 1，CHANG Zhi2 |
| （ 1. Ansteel Beijing Research Institute Co., Ltd., Beijing 102211, China;2. Pangang Group Vanadium Titanium &
Resources Co., Ltd, Panzhihua 617000, China） |
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Abstract The Gibbs free energy, adiabatic temperature and calorific value of AlV85 master alloy prepared by alu‐
minothermal method were calculated according to the thermodynamie prineiples, the process was studied using dif‐
ferential thermal analysis, the kinetic equations of AlV85 alloy produced by the aluminothermal method with differ‐
ent sizes of Al powder were constructed. The reaction of AlV85 master alloy by the aluminothermal method can be
carried out and maintained spontaneously，with adiabatic temperature of 2 327 K and calorific value of 4 169 J/mol.
Al powder is melted first and reacts with solid V2O5 to replace V and produce part of AlmVn, then part of V and
AlmVn react to form V solid solution at about 1 000 K. The particle size of aluminum powder has a great influence
on the reaction process and reaction products; The kinetic equations of AlV85 master alloy preparation with differ‐
ent particle sizes aluminum powder is constructed, the smaller the particle size, the lower the activation energy and
the higher the frequency factor.
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Received: 01 November 2022
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2024, Vol. 34 
