Investigation of the Reaction between Fe2O3 and Al Accomplished by Ball Milling and Self-Propagating High-Temperature Techniques
Investigation of the Reaction between Fe2O3 and Al Accomplished by Ball Milling and Self-Propagating High-Temperature Techniques
复制标题
DOI：
10.1515/zna-1997-6-713
复制
发表时间：
1997-07
期刊：
影响因子：
--
通讯作者：
G. Cao;G. Concas;A. Corrias;R. Orrú;G. Paschina;B. Simoncini;G. Spano
中科院分区：
文献类型：
--
作者：
G. Cao;G. Concas;A. Corrias;R. Orrú;G. Paschina;B. Simoncini;G. Spano
本文用球磨和自蔓延高温技术研究了Al_2O_3存在下Fe_2O_3铝热反应产物的形成机理。用X射线衍射仪、穆斯堡尔谱和显微组织观察等手段分析了在Ar和空气气氛下的实验结果。结果表明，球磨产物受气氛的影响较大，而自蔓延高温产物的影响较小。提出了在这些情况下发生的反应机理。虽然球磨只涉及固态反应，但熔体的形成是在自蔓延高温条件下发生的。
Abstract In this work we investigate the mechanism of product formation of the aluminothermic reaction of Fe2O3 in the presence of Al2O3 using Ball Milling and Self-propagating High-temperature techniques. Results obtained by experiments under either argon or air atmosphere are analysed by X-ray diffraction and Mössbauer spectroscopy, together with microstructure observations. It is shown that ball milling products are strongly affected by the kind of atmosphere, while self-propagating high-temperature ones are only weakly influenced. Reaction mechanisms taking place in these cases are proposed. While ball milling involves only solid state reactions, the formation of a melt occurs under self-propagating high-temperature conditions.