High performance NdFeB permanent magnetic material prepared by spark plasma sintering - 文章详情页

作者：

Wang, Gong-Ping (Wang, Gong-Ping.) | Yue, Ming (Yue, Ming.) (学者：岳明) | Zhang, Jiu-Xing (Zhang, Jiu-Xing.) | Liu, Wei-Qiang (Liu, Wei-Qiang.) (学者：刘卫强)

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摘要：

A　new　type　of　NdFeB　magnet　with　high　magnetic　properties　was　prepared　by　spark　plasma　sintering　(SPS)　method.　The　effect　of　sintering　and　heat　treatment　techniques　on　microstructures　and　magnetic　properties　of　magnets　was　systematically　studied.　The　microstructures　and　magnetic　properties　of　magnet　materials　were　tested　by　scanning　electronic　microscope　(SEM)　and　B-H　loop-line　instrument,　respectively.　The　results　show　that　the　densification　of　magnets　is　greatly　improved　with　the　increase　of　sintering　temperature,　while　exorbitant　sintering　temperature　will　decrease　the　density　of　magnets　because　the　Nd-rich　phase　distributes　poorly　along　the　boundaries　of　the　NdFeB　grains.　Under　optimum　processing　conditions,　the　SPS　NdFeB　magnet　possesses　the　best　magnetic　properties　with　remanence　of　1.351　T,　coercive　force　of　674.4　kA/m　and　maximum　energy　product　of　360.4　kJ/m3.

关键词：

Density (specific gravity) Electric sparks Heat treatment Iron alloys Magnetic materials Magnetic properties Microstructure Neodymium alloys Permanent magnets Plasmas Sintering Temperature

作者机构：

[ 1 ] [Wang, Gong-Ping]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Yue, Ming]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Zhang, Jiu-Xing]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 4 ] [Liu, Wei-Qiang]Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China

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