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Misorientations across boundary planes in a sintered NdFeB permanent magnet
From the perspective of crystallography, there exist crystals as well as boundary planes in NdFeB permanent magnets and accordingly, there should exist orientation textures of Nd(2)Fe(14)B crystals and orientation texture of boundary planes. This work therefore aims to study the misorientations acro...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9277534/ https://www.ncbi.nlm.nih.gov/pubmed/35919597 http://dx.doi.org/10.1039/d2ra01670b |
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author | Yuan, Xiaokun Zhu, Jie |
author_facet | Yuan, Xiaokun Zhu, Jie |
author_sort | Yuan, Xiaokun |
collection | PubMed |
description | From the perspective of crystallography, there exist crystals as well as boundary planes in NdFeB permanent magnets and accordingly, there should exist orientation textures of Nd(2)Fe(14)B crystals and orientation texture of boundary planes. This work therefore aims to study the misorientations across boundary planes in a sintered NdFeB permanent magnet. As an interdisciplinary study, serial stereological methods are developed to extract more structural information from the material and as the result, spreading wetting and penetration of Nd-Rich phases to the Nd(2)Fe(14)B phase are quantificationally characterized. The entire boundaries are sorted into Nd(2)Fe(14)B/Nd(2)Fe(14)B grain boundaries (N/N boundaries) and Nd(2)Fe(14)B/(thin-layer-like)Nd-Rich phase boundaries (N/R boundaries). 31°/[0 0 1] and 60°/[0 0 1] twist boundaries are preferred among N/N boundaries, while 31°/[0 0 1] and 72°/[0 0 1] misorientations are preferred among N/R boundaries. The structural features of these misorientations are elaborated via the Five Parameter Analysis (FPA) method. The potential correlations between the grain boundary plane distributions (GBPDs) and magnetic properties are then discussed regarding how the anisotropic features at boundary locations impact coercivity, domain and remanence. |
format | Online Article Text |
id | pubmed-9277534 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-92775342022-08-01 Misorientations across boundary planes in a sintered NdFeB permanent magnet Yuan, Xiaokun Zhu, Jie RSC Adv Chemistry From the perspective of crystallography, there exist crystals as well as boundary planes in NdFeB permanent magnets and accordingly, there should exist orientation textures of Nd(2)Fe(14)B crystals and orientation texture of boundary planes. This work therefore aims to study the misorientations across boundary planes in a sintered NdFeB permanent magnet. As an interdisciplinary study, serial stereological methods are developed to extract more structural information from the material and as the result, spreading wetting and penetration of Nd-Rich phases to the Nd(2)Fe(14)B phase are quantificationally characterized. The entire boundaries are sorted into Nd(2)Fe(14)B/Nd(2)Fe(14)B grain boundaries (N/N boundaries) and Nd(2)Fe(14)B/(thin-layer-like)Nd-Rich phase boundaries (N/R boundaries). 31°/[0 0 1] and 60°/[0 0 1] twist boundaries are preferred among N/N boundaries, while 31°/[0 0 1] and 72°/[0 0 1] misorientations are preferred among N/R boundaries. The structural features of these misorientations are elaborated via the Five Parameter Analysis (FPA) method. The potential correlations between the grain boundary plane distributions (GBPDs) and magnetic properties are then discussed regarding how the anisotropic features at boundary locations impact coercivity, domain and remanence. The Royal Society of Chemistry 2022-07-13 /pmc/articles/PMC9277534/ /pubmed/35919597 http://dx.doi.org/10.1039/d2ra01670b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Yuan, Xiaokun Zhu, Jie Misorientations across boundary planes in a sintered NdFeB permanent magnet |
title | Misorientations across boundary planes in a sintered NdFeB permanent magnet |
title_full | Misorientations across boundary planes in a sintered NdFeB permanent magnet |
title_fullStr | Misorientations across boundary planes in a sintered NdFeB permanent magnet |
title_full_unstemmed | Misorientations across boundary planes in a sintered NdFeB permanent magnet |
title_short | Misorientations across boundary planes in a sintered NdFeB permanent magnet |
title_sort | misorientations across boundary planes in a sintered ndfeb permanent magnet |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9277534/ https://www.ncbi.nlm.nih.gov/pubmed/35919597 http://dx.doi.org/10.1039/d2ra01670b |
work_keys_str_mv | AT yuanxiaokun misorientationsacrossboundaryplanesinasinteredndfebpermanentmagnet AT zhujie misorientationsacrossboundaryplanesinasinteredndfebpermanentmagnet |