In Situ Observation of Aluminothermic Reduction of MgO with High Temperature Optical Microscope
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概要
- 論文の詳細を見る
Desulfurization and deoxidation of molten iron with magnesium vapor produced in-situ by aluminothermic reduction of magnesium oxide has been developed. In the present study, the mechanism of aluminothermic reduction of magnesium oxide by use of pellets composed of magnesium oxide and aluminum powders was discussed. SEM observation of the pellets at different reduction stages for various temperatures showed that fracture and disappearance of the alumina films on the aluminum particles were stimulated above 1 473 K, and thus the reduction of magnesium oxide was greatly accelerated.From in-situ observation of the aluminothermic reduction of magnesium oxide using a high temperature optical microscope (HTOM), it was found that the reduction proceeded after the penetration of molten aluminum into the magnesium oxide phase. The penetration began at 1 273 K and it was accelerated above 1 373 K. The reduction took place violently at 1 473 K. SEM observation and EDS analysis of the cooled sample revealed that the penetration took place only through cracks of the alumina film.In-situ observation of the melting process of aluminum particles together with SEM observation of the cooled sample showed that the thermal stress and the stress formed during phase transformation could break up the alumina film and the outflow of molten aluminum did take place at the elevated temperature.
- 社団法人 日本鉄鋼協会の論文
- 2006-02-15
著者
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Yang Jian
Department of Electronic Engineering, Tsinghua University
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Yang J
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Yang J
Tsinghua Univ. Beijing Chn
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Yang Jian
Nagoya Univ. Nagoya Jpn
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Kuwabara Mamoru
Department of Materials, Physics and Energy Engineering, Gradurate School of Engineering, Nagoya Uni
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Yang Jian
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Asano Takashi
Department Of Molecular Biology And Biotechnology Graduate School Of Pharmaceutical Sciences Chiba U
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Kuwabara Mamoru
Dept. of Materials, Physics and Energy Eng. Nagoya Univ.
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LIU Zhongzhu
Graduate School of Engineering, Nagoya University
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SANO Masamichi
Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya Univ
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LIU Zhongzhu
Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya Univ
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Yang Jian
Graduate School Of Engineering Nagoya University
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Sano Masamichi
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Sano M
School Of Engineering Nagoya University
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Yang Jian
Department Of Cardiology Renmin Hospital Of Wuhan University
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Kuwabara Mamoru
Shougang Res. Inst. Of Technol.
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Kuwabara Mamoru
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Asano Takashi
Department Of Electronic Science And Engineering Kyoto University
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Asano Takashi
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Yang Jian
Department Of Cardiology Daping Hospital The Third Military Medical University
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Asano Takashi
Department Of Child Neurology Okayama University Medical School
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Yang J
Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers
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Yang Jian
Department Of Anesthesiology University Of Florida College Of Medicine
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Liu Zhongzhu
Graduate School Of Engineering Nagoya Univ.
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