Abstract

The products of the mechanochemical reduction of iron oxide with aluminum have been studied by means of X-ray diffraction analysis, infrared and Mössbauer spectroscopy. It is shown that the products of the mechanochemical reaction at a stoichiometric ratio of iron oxide and aluminum contain iron, α‑Al₂O₃, and a large amount of spinel (hercynite), which slightly decreases with an increase in the time of mechanical activation. According to the Mössbauer spectroscopy data, the reduction of iron oxide proceeds faster with a twofold increase in the aluminum content as compared to the stoichiometric one, and the excess aluminum reacts with the reduced iron, forming intermetallic Fe_xAl_y phases mainly the monoaluminide FeAl strengthened by α-Al₂O₃ particles. Upon a threefold excess of the aluminum content over the stoichiometric one, the mechanochemical reduction slows down and the amount of Fe_xAl_y intermetallic compounds with a higher aluminum content increases in the final products of reaction.

中文翻译：

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用铝还原氧化铁的机械化学刺激反应

摘要

已经通过 X 射线衍射分析、红外和穆斯堡尔光谱研究了氧化铁与铝的机械化学还原产物。结果表明，氧化铁和铝的化学计量比下的机械化学反应产物中含有铁、α-Al ₂ O ₃和大量尖晶石（海长石），随着机械反应时间的增加而略有减少。激活。根据穆斯堡尔光谱数据，与化学计量相比，当铝含量增加两倍时，氧化铁的还原速度更快，并且过量的铝与还原的铁反应，形成金属间化合物 Fe _x Al _y相主要是由α-Al ₂ O ₃颗粒强化的单铝化物FeAl 。当铝含量超过化学计量值的三倍时，机械化学还原减慢，反应最终产物中具有较高铝含量的 Fe _x Al _y金属间化合物的量增加。