Preparation of AlV55 Alloy by Aluminothermic Reduction
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摘要: 利用Fact Sage热力学软件和差热分析仪对铝热法制备AlV55合金的热力学过程进行了分析, 结果表明:该反应可自发进行, 反应的绝热燃烧温度为3 276.61K, 单位热效应为4 567.06 J·g-1, 属于液—液反应。研究了不同V含量对合金成品率以及单位热效应对合金钒收率的影响:对于AlV55合金, 提高合金V含量可以最大程度的降低脆性相Al8V5对合金成品率的影响, 所以在不隔绝空气的情况下提高合金的V含量可达到提高合金成品率的目的;单位热效应对合金钒收率影响很大, 单位热效应确定为3 367 J·g-1时合金的钒收率最高, 约为96.5%。Abstract: The thermodynamics for preparation of AlV55 by aluminothermic process was analyzed by Fact Sage software and differential thermal analyzer.The results show that the reaction occurs spontaneously with 3 276.61 K of adiabatic combustion temperature and 4 567.06 J·g-1 of unit thermal effect,attributed to a liquid-liquid reaction.The effect of V content on yield rate of products and influence of unit thermal effect on vanadium yield rate were also studied.It is indicated that for AlV55 alloy the elevated V content can reduce the effect of Al8V5 brittle phase and increase the yield rate of products in air atmosphere.The unit thermal effect has a significant effect on vanadium yield rate,with about 96.5% of the maximum vanadium yield rate at 3 367 J·g-1 of the unit thermal effect.
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Key words:
- V-Al alloy /
- aluminothermics /
- thermodynamics /
- vanadium yield rate
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