المؤلفون: Qiang Ma, Liu Yanli, Xuefeng Zhang, Jian-Ting Lan, Le-le Zhang, Qian Zhao, Yong-Feng Li, Zhu-bai Li

المصدر: AIP Advances, Vol 7, Iss 5, Pp 056228-056228-6 (2017)

مصطلحات موضوعية: 010302 applied physics, Materials science, Metallurgy, Analytical chemistry, General Physics and Astronomy, 02 engineering and technology, Coercivity, 021001 nanoscience & nanotechnology, Magnetocrystalline anisotropy, 01 natural sciences, lcsh:QC1-999, Magnetic anisotropy, Phase (matter), Magnet, 0103 physical sciences, Curie temperature, Grain boundary, 0210 nano-technology, Anisotropy, lcsh:Physics

الوصف: The variation of coercivity with Ce content was investigated in (Pr,Nd)15-xCexFe77B8 (x=0∼10) sintered magnets. The coercivity of magnets largely decreases from 10.22 to 5.4 kOe with increasing x from 0 to 2. The coercivity rises to 7.68 kOe when x=3 and then decreases again with further increasing Ce content. However, both the magnetocrystalline anisotropy and Curie temperature decrease monotonically with increasing Ce content. EDS composition analysis shows that the Ce concentration in the Re2Fe14B main phase is higher than that in the nominal composition when x≤3, but becomes lower when x>3. These results indicate that Ce tends to be expelled from the main phase and segregates at or near the grain boundary regions if Pr-Nd is excessively substituted by Ce. The change of relative solubility of Ce in Re2Fe14B would lead to the change of distributions of Ce and Pr-Nd elements, and thus result in the change of anisotropy at the grain outer layer, contributing to the abnormal behavior of coercivity. These studied results are also expected to provide a guideline for optimizing the composition design of resource-saving permanent magnets.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5d7a3d7a90426266dac848e69b3e88aTest
https://doi.org/10.1063/1.4977722Test

المؤلفون: Xue-feng Zhang, Le-le Zhang, Zhu-bai Li, Jian-ting Lan, Yan-li Liu, Qiang Ma, Yong-feng Li, Qian Zhao

المصدر: AIP Advances; 2017, Vol. 7 Issue 5, p1-6, 6p

مصطلحات موضوعية: COERCIVE fields (Electronics), MAGNETS

مستخلص: The variation of coercivity with Ce content was investigated in (Pr,Nd)15-xCexFe77B8 (x=0~10) sintered magnets. The coercivity of magnets largely decreases from 10.22 to 5.4 kOe with increasing x from 0 to 2. The coercivity rises to 7.68 kOe when x=3 and then decreases again with further increasing Ce content. However, both the magnetocrystalline anisotropy and Curie temperature decrease monotonically with increasing Ce content. EDS composition analysis shows that the Ce concentration in the Re2Fe14B main phase is higher than that in the nominal composition when x≤3, but becomes lower when x>3. These results indicate that Ce tends to be expelled from the main phase and segregates at or near the grain boundary regions if Pr-Nd is excessively substituted by Ce. The change of relative solubility of Ce in Re2Fe14B would lead to the change of distributions of Ce and Pr-Nd elements, and thus result in the change of anisotropy at the grain outer layer, contributing to the abnormal behavior of coercivity. These studied results are also expected to provide a guideline for optimizing the composition design of resource-saving permanent magnets. [ABSTRACT FROM AUTHOR]

: Copyright of AIP Advances is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

المؤلفون: Xue-feng Zhang, Le-le Zhang, Zhu-bai Li, Jian-ting Lan, Yan-li Liu, Qiang Ma, Yong-feng Li, Qian Zhao

المصدر: AIP Advances, Vol 7, Iss 5, Pp 056228-056228-6 (2017)

مصطلحات موضوعية: Physics, QC1-999

الوصف: The variation of coercivity with Ce content was investigated in (Pr,Nd)15-xCexFe77B8 (x=0∼10) sintered magnets. The coercivity of magnets largely decreases from 10.22 to 5.4 kOe with increasing x from 0 to 2. The coercivity rises to 7.68 kOe when x=3 and then decreases again with further increasing Ce content. However, both the magnetocrystalline anisotropy and Curie temperature decrease monotonically with increasing Ce content. EDS composition analysis shows that the Ce concentration in the Re2Fe14B main phase is higher than that in the nominal composition when x≤3, but becomes lower when x>3. These results indicate that Ce tends to be expelled from the main phase and segregates at or near the grain boundary regions if Pr-Nd is excessively substituted by Ce. The change of relative solubility of Ce in Re2Fe14B would lead to the change of distributions of Ce and Pr-Nd elements, and thus result in the change of anisotropy at the grain outer layer, contributing to the abnormal behavior of coercivity. These studied results are also expected to provide a guideline for optimizing the composition design of resource-saving permanent magnets.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2158-3226Test

الوصول الحر: https://doaj.org/article/cd07c41b5eb245e3b84c0263a047eac3Test