| Mechanical alloying of Mo—Si—Fe powders |
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| 引用本文： | 曹昱,易丹青,张松. Mechanical alloying of Mo—Si—Fe powders[J]. 中国有色金属学会会刊, 2002, 12(4): 681-685 |
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| 作者姓名： | 曹昱 易丹青 张松 |
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| 作者单位： | 曹昱,张松(Department of Materials Science and Engineering, Central South University,Changsha 410083, China);易丹青(Department of Materials Science and Engineering, Central South University,Changsha 410083, China；State Key Laboratory for Powder Metallurgy, Central South University,Changsha 410083, China) |
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| 基金项目： | 国家自然科学基金，the State Key Laboratory for Powder Metallurgy |
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| 摘 要： |
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| 关 键 词： | Mo－Si－Fe粉 粉末冶金 机械合金化 |
Mechanical alloying of Mo-Si-Fe powders |
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| Abstract: | Mechanical milling behavior of Mo-Si-Fe powders was investigated u sing XRD, SEM and TEM techniques. The mixtures of elemental molybdenum (>99%), s ilicon (>99%) and iron (>98%) powders with a stoichiometry of Mo5-xFe xSi3 (x=0.5, 1, 2) were milled in a planetary mill for up to 195 h. For all three powder mixt ures, high-energy milling of 60h led to formation of the Mo(Fe, Si) supers aturated solid solution (Moss); and to a remarkable expansion of the solub ility of Fe, Si in molybdenum. The transformation of Moss to an amorphous phase was identified after longer time milling. In the milling process, the grain size of Mo (Fe, Si) decreased gradually and the internal stress increased linearly. After 40 h milling, the grain size was reduced to about 11 nm. SEM analysis of milled powders showed that the particle size increased initially with milling time. After 195 h milling, particles exhibited a spherical morphology and the particle size were reduced to about 100 nm. |
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| Keywords: | silicides mechanical alloying structure refinement alloying effect |
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