| 高能球磨Nd_(14)Dy_1Fe_(72)Co_5B_8合金的微观结构和磁性 |
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| 引用本文： | 柳林,董远达,熊曹水. 高能球磨Nd_(14)Dy_1Fe_(72)Co_5B_8合金的微观结构和磁性[J]. 材料科学与工艺, 1992, 0(Z1) |
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| 作者姓名： | 柳林 董远达 熊曹水 |
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| 作者单位： | 中国科学院固体物理研究所，中国科学院固体物理研究所，中国科学技术大学物理系 |
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| 摘 要： | 本文采用 X 射线衍射,透射电镜和振动样品磁强计等技术研究了 Nd_(14)Dy_1Fe_(72)Co_5B_8合金在高能球磨过程中的结构变化以及结构与矫顽力的关系。我们认为高能球磨 Nd_(14)Dy_1Fe_(72)Co_5B_8合金的矫顽力源于晶界对畴壁的钉扎。在球磨初期,矫顽力随球磨时间的增加而增加,这主要归结于晶粒细化引起的晶界密度的增加。当球磨时间超过30小时,矫顽力随球磨时间的增加而减小,这可能是由于在球磨过程中引入很大的微观应力和高密度的缺陷,导致 R_2TM_(14)B(R=Nd、Dy;TM=Fe、Co)磁性相的磁晶各向异性场降低。
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| 关 键 词： | 高能球磨 微观结构 磁性 |
The Microstructure and Magnetic Properties of a High-energy Ball Milled Nd_(14)Dy_1Fe_(72)Co_5B_8 Alloy |
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| Liu Lin Dong Yuanda. The Microstructure and Magnetic Properties of a High-energy Ball Milled Nd_(14)Dy_1Fe_(72)Co_5B_8 Alloy[J]. Materials Science and Technology, 1992, 0(Z1) |
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| Authors: | Liu Lin Dong Yuanda |
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| Abstract: | The microstructure and the relationship between the coercivity and the structure of the ball milled Nd_(14)Dy_1Fe_(72)Co_5B_8 alloy were investigated.It is suggested that the coercivity of the milled alloy results from domains wall pinning at boundaries.At the initial state of milling,the coercivity increases with milling time,which may mainly be attributed by the increa- se of boundary density caused by decreasing grain size.At the sage of more than 30 hrsof milling,the coercivity decreases with milling time;this eff- ect may be due to an introduction of mierostrains and defeets into the crys- tal lattice in the process of mechanical grinding,which would eventually reduce the anisotropy field of the 2-14-1 phase. |
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| Keywords: | High-energy Ball milling Microstructure Magnetic Properties |
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