航空航天级A1V85中间合金制备热力学及动力学研究
Thermodynamic analysis and reaction kinetic for the preparation of aerospace-grade AlV85 master alloy
苑子凯 1黄召阔 1于继洋 1滕艾均 1常智2
作者信息
- 1. 鞍钢集团北京研究院有限公司,北京 102211
- 2. 攀钢集团钒钛资源股份有限公司,四川攀枝花 617000
- 折叠
摘要
根据热力学原理对铝热法制备A1V85中间合金过程进行了吉布斯自由能、绝热温度及热值的计算,使用差热分析法分析了合金生产过程,构建了使用不同粒度Al粉铝热法生产A1V85合金的动力学方程.使用铝热法生产A1V85中间合金能够自发进行并维持,其绝热燃烧温度为2 327 K,热值4 169J/g;铝粉受热熔化后与固态的V2O5反应,置换出V并生成部分AlmVn,在约1 000K的温度下部分V和AlmVn反应生成V基固溶体;铝粉粒度对反应过程及反应产物有较大影响;构建了不同粒度铝粉生产A1V85合金的动力学方程,粒度越小,活化能越低、指前因子越高.
Abstract
The Gibbs free energy,adiabatic temperature and calorific value of A1V85 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 A1V85 alloy produced by the aluminothermal method with differ-ent sizes of Al powder were constructed.The reaction of A1V85 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 A1V85 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.
关键词
AlV85,中间合金/铝热法/热力学及动力学/差热分析Key words
A1V85/master alloy/thermite method/thermodynamics and dynamics/differential thermal analysis引用本文复制引用
基金项目
2023年鞍钢集团资助项目(2023BJB-02PG)
出版年
2024
NETL
NSTL
万方数据