| 磁铁矿在H2／Ar气氛中还原产物显微结构与形貌变化的原位观测 |
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| 引用本文： | 王雅蓉,李继光,赵国军,许力贤,李殷泰.磁铁矿在H2／Ar气氛中还原产物显微结构与形貌变化的原位观测[J].金属学报,1998,34(6):571-578. |
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| 作者姓名： | 王雅蓉 李继光 赵国军 许力贤 李殷泰 |
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| 作者单位： | [1]东北大学材料与冶金学院 [2]东北大学资源与土木工程学院 |
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| 摘 要： | 采用热台显微镜（ＨＳＭ）技术，直接观测了Ｈ２／Ａｒ气氛中还原时磁铁矿表面显微结构的变化，探讨了不同条件下，铁核不同的形核，长大模式及平均长大速度，结果表明，７７３－１３７３Ｋ温度范围内，在所研究的气氛条件下，主要有四种不同特征的核形貌及相应的核长大模式。各种形貌之间的相互转化以及核的平均长大速度与还原温度和氢分压有关。
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| 关 键 词： | 磁铁矿 还原 显微结构 形貌 原位观测 炼铁 |
| 收稿时间： | 1998-06-18 |
| 修稿时间： | 1998-06-18 |
IN SITU OBSERVATIONS OF MICROSTRUCTURAL AND MORPHOLOGICCAL CHANGES OF THE REDUCTION PRODUCT OF MAGNETITE IN H_2/Ar GAS MIXTURES |
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| WANG Yarong,LI Jiguang,ZHAO Guojun,XU Lixian,LI YintaiComspondent: LI Yintai,professor,Tel: Fax.IN SITU OBSERVATIONS OF MICROSTRUCTURAL AND MORPHOLOGICCAL CHANGES OF THE REDUCTION PRODUCT OF MAGNETITE IN H_2/Ar GAS MIXTURES[J].Acta Metallurgica Sinica,1998,34(6):571-578. |
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| Authors: | WANG Yarong LI Jiguang ZHAO Guojun XU Lixian LI YintaiComspondent: LI Yintai professor Tel: Fax |
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| Affiliation: | WANG Yarong,LI Jiguang,ZHAO Guojun,XU Lixian,LI Yintai(School of Materials and Metallurgy,Northeastern University,Shenyang )(School of Sources and Civil Engineering,Northeaster University,Shenyang )Comspondent: LI Yintai,professor,Tel: () Fax () |
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| Abstract: | The microstructural changes occurring on the surface of magnetite samples in H2/Ar gas mixture have been directly recorded using an optical heating stage technique, and the nucleation, growth model and growth rate of iron nuclei under different reduction conditions were discussed. The results show that in the temperature range of 773 -- 1373 K, four kinds of nucleus morphologies and growth models with different characteristics were observed tinder different reduction conditions. Morphology transformation and average growth rate of iron nuclei were found to be closely related to temperature and hydrogen partial pressure. |
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| Keywords: | magnetite reduction microstructure morphology |
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