Hydrogen Decrepitation Press-Less Process recycling of NdFeB sintered magnets

作者：Xia Manlong; Abrahamsen Asger B^*; Bahl Christian R H; Veluri Badrinath; Soegaard Allan I; Bojsoe Poul

来源：Journal of Magnetism and Magnetic Materials, 2017, 441: 55-61.

DOI：10.1016/j.jmmm.2017.01.049

• Recycling
• NdFeB sintered magnet
• Press-Less Process

A Hydrogen Decrepitation Press-Less Process (HD-PLP) recycling method for recycling of anisotropic NdFeB magnets is demonstrated. The method combines hydrogen decrepitation (HD) disintegration of the initial magnet, powder sieving and the Press-Less Process (PLP), where hydride powder is sintered in a graphite mold. Coercivities up to 534 kA/m were obtained in porous samples based on powder size d < 100 mm. Adding a ball milling step resulted in full density isotropic magnets for d > 100 mu m. The coercivity reached H-ci = 957 kA/m being 86% of the original N48M material without addition of rare earth elements.

• 出版日期2017-11-1