| 液相沉淀-热还原纳米Fe包覆Mo粉末微结构特征 |
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| 引用本文： | 银锐明,范景莲,刘勋,张曙光.液相沉淀-热还原纳米Fe包覆Mo粉末微结构特征[J].中国有色金属学报,2010,20(1). |
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| 作者姓名： | 银锐明 范景莲 刘勋 张曙光 |
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| 作者单位： | 1. 中南大学,粉末冶金国家重点实验室,长沙410083;湖南工业大学,包装与材料工程学院,株洲412008
2. 中南大学,粉末冶金国家重点实验室,长沙410083 |
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| 基金项目： | 国家自然科学青年基金资助项目，国家自然科学基金创新研究群体科学基金资助项目 |
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| 摘 要： | 采用液相沉淀-热还原法制备纳米Fe包覆Mo合金粉末,研究还原过程中的晶粒组织及微结构并进行分析.结果表明:还原过程中,粉末晶粒平均晶粒尺寸随还原温度的升高而变小,微观应变在还原温度为600 ℃时最高,Mo晶粒先于Fe晶粒还原并长大至1 μm左右,Fe晶粒粒径最终保持为1.8 nm,并形成20 nm左右的薄层,沉积在Mo颗粒表面.
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| 关 键 词： | 液相沉淀-热还原 晶粒组织 微结构 |
Microstructure characteristics of nanometer Fe coated Mo powders prepared by liquid precipitation-thermal reduction method |
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| YIN Rui-ming,FAN Jing-lian,LIU Xun,ZHANG Shu-guang.Microstructure characteristics of nanometer Fe coated Mo powders prepared by liquid precipitation-thermal reduction method[J].The Chinese Journal of Nonferrous Metals,2010,20(1). |
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| Authors: | YIN Rui-ming FAN Jing-lian LIU Xun ZHANG Shu-guang |
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| Affiliation: | YIN Rui-ming1,2,FAN Jing-lian1,LIU Xun1,ZHANG Shu-guang1 (1.State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China,2.College of Packaging , Material Engineering,Hunan University of Technology,Zhuzhou 412008,China) |
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| Abstract: | Nanometer Fe coated Mo powders were prepared by liquid precipitation and thermal reduction. The grain structure and microstructure of materials during the reduction process were discussed. The results show that the average grain size of Fe coated Mo powders decrease with increasing reduction temperature, and the microstrain reaches the maximum at the reduction temperature of 600 ℃. The reduction of Mo grains precedes over Fe grains and the Mo grains grow significantly. The microstructure of the Fe coated Mo alloy powders is the Mo particles with the size about 1 μm coated layer-by-layer by metastable Fe grains and normal state Fe grains whose lattice constant closes to Mo grains, and the total thickness is around 20 nm. |
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| Keywords: | Fe-Mo liquid precipitation-thermal reduction Fe-Mo grain structure microstructure |
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