Granularity Effect for HDDR Anisotropy NdFeB Powder and Magnetic Powder Surface Defect Layer Model

Liu Xubo; Xiao Yaofu; Zhang Zhengyi; Qiu Baoqin; Wang Run

doi:10.13374/j.issn1001-053x.1999.05.040

Volume 21 Issue 5

Aug. 2021

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Article Navigation > Chinese Journal of Engineering > 1999 > 21(5): 462-464

Liu Xubo, Xiao Yaofu, Zhang Zhengyi, Qiu Baoqin, Wang Run. Granularity Effect for HDDR Anisotropy NdFeB Powder and Magnetic Powder Surface Defect Layer Model[J]. Chinese Journal of Engineering, 1999, 21(5): 462-464. doi: 10.13374/j.issn1001-053x.1999.05.040

Citation:

Liu Xubo, Xiao Yaofu, Zhang Zhengyi, Qiu Baoqin, Wang Run. Granularity Effect for HDDR Anisotropy NdFeB Powder and Magnetic Powder Surface Defect Layer Model[J]. Chinese Journal of Engineering, 1999, 21(5): 462-464. doi: 10.13374/j.issn1001-053x.1999.05.040

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Granularity Effect for HDDR Anisotropy NdFeB Powder and Magnetic Powder Surface Defect Layer Model

doi: 10.13374/j.issn1001-053x.1999.05.040

Material Science and Engineering School, UST Beijing, Beijing 100083, China

Received Date: 1999-01-12
Available Online: 2021-08-27

Abstract

Abstract

The granularity effect for HDDR anisotropy NdFeB powder is studied.The results indicate that the granularity effect for the above powder is low and this powder adapts to preparing for bonded magnet. However, the granularity effect for HDDR anisotropy NdFeB powder is higher than melt-spun NdFeB powder. On the basis of above results, a magnetic powder defect layer model is put forward. The model considers that each magnetic powder consists of surface defect layer, transition layer and main body and that the overall magnetic properties of each magnetic powder result from the magnetic properties of the above each layer of the magnetic powder.
- HDDR,
- NdFeB,
- granularity effect,
- magnetic powder defect layer model