| 混合球磨对YAl_2颗粒形貌及表面改性的影响 |
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| 引用本文： | 张鑫,吴国清,凌赵华,黄正.混合球磨对YAl_2颗粒形貌及表面改性的影响[J].北京航空航天大学学报,2011,37(11):1425-1428. |
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| 作者姓名： | 张鑫 吴国清 凌赵华 黄正 |
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| 作者单位： | 北京航空航天大学材料科学与工程学院,北京,100191;北京航空航天大学材料科学与工程学院,北京,100191;北京航空航天大学材料科学与工程学院,北京,100191;北京航空航天大学材料科学与工程学院,北京,100191 |
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| 基金项目： | 国家自然科学基金资助项目(50901005);北京市科技新星计划资助项目(2007B016) |
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| 摘 要： | 采用扫描电镜、能谱分析、透射电镜等分析方法研究了球磨对YAl2及YAl2/Mg颗粒的组织形貌、YAl2颗粒在YAl2/Mg颗粒中的分散性及YAl2/Mg界面结合状况的影响.结果表明:YAl2颗粒经球磨20 h后,其平均粒径约为1.5 μm,颗粒边缘尖角数量明显减少,呈圆滑的近球形.加入Mg颗粒进行混合球磨20 h后,YAl2颗粒在混合颗粒中呈弥散分布,且表面包裹一层单质Mg,YAl2/Mg的界面为直接结合型,未发现有界面反应.
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| 关 键 词： | 球磨 表面改性 界面结构 |
| 收稿时间： | 2010-06-22 |
Effect of mix milling on the microstructure and surface modification of YAl2 particles |
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| Zhang Xin Wu Guoqing Ling Zhaohua Huang Zheng.Effect of mix milling on the microstructure and surface modification of YAl2 particles[J].Journal of Beijing University of Aeronautics and Astronautics,2011,37(11):1425-1428. |
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| Authors: | Zhang Xin Wu Guoqing Ling Zhaohua Huang Zheng |
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| Institution: | School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | A homogeneous distribution of ultrafine YAl2 particles in YAl2/Mg mixture was obtained by mix-milling method. The effect of milling on the microstructure of YAl2 particles and the dispersion of YAl2 particles in the mixture were investigated by scanning electron microscopy (SEM), energy dispersive X-ray (EDAX) and transmission electron microscope (TEM) techniques. The results show that with increasing milling time, YAl2 particle size decreases, and the amount of particle sharp corners is significantly reduced. After 20 h of milling, YAl2 particles have a nearly spherical shape with an average size of approximately 1.5 μm. YAl2 particles are coated by elemental magnesium, and distribute uniformly in YAl2/Mg mixture through ball milling. |
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| Keywords: | ball milling modification interfaces |
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