| 高能球磨时间对Fe-Al粉末合金化组织转变的影响 |
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| 引用本文： | 闫石,金洙吉,马兴伟.高能球磨时间对Fe-Al粉末合金化组织转变的影响[J].粉末冶金工业,2009,19(6). |
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| 作者姓名： | 闫石 金洙吉 马兴伟 |
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| 作者单位： | 大连理工大学机械工程学院,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 在真空条件下利用球磨技术获得Fe-Al合金粉末.利用超景深显微镜和SEM研究了高能球磨过程中粉末微观组织与形貌的演变规律;利用XRD分析了球磨时间对合金化程度的影响.结果表明:随着球磨时间的延长,Fe、Al混合粉末在变形和冷焊作用下颗粒粗化、密实,发生合金化;加工硬化导致了颗粒脆性化,在磨球的撞击下发生颗粒细化;庚烷作为过程控制剂可以减缓颗粒粗化,缩短球磨时间;经过30 h的球磨可获得3μm的Fe-Al合金粉末.
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| 关 键 词： | Fe-Al合金 机械球磨 组织转变 |
INFLUENCE OF HIGH POWER BALL MILLING TIME ON STRUCTURAL CHANGE OF Fe-Al POWDER ALLOYING |
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| YAN Shi,JIN Zhu-ji,MA Xing-wei.INFLUENCE OF HIGH POWER BALL MILLING TIME ON STRUCTURAL CHANGE OF Fe-Al POWDER ALLOYING[J].Powder Metallurgy Industry,2009,19(6). |
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| Authors: | YAN Shi JIN Zhu-ji MA Xing-wei |
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| Affiliation: | YAN Shi,JIN Zhu-ji,MA Xing-wei(School of Mechanical Engineering,Dalian University of Technology,Liaoning Dalian 116024,China) |
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| Abstract: | The Fe-Al alloy powder was prepared by ball milling under vacuum.The influence of milling time on alloying was studied.The microstructure and structural change were investigated by microscope and SEM.The alloying process was shown by XRD spectrum.The results showed that Fe,Al particles are alloyed through coarsing,densification due to deformation and welding.The brittleness is caused by work-hardening and collision and particles are refined too.Heptane as the PCA could reduce coarsing of particles and short... |
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| Keywords: | Fe-Al alloying mechanical ball milling structural change |
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