期刊
JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY
卷 56, 期 3, 页码 415-424出版社
TECHNICAL FACULTY, BOR-SERBIA
DOI: 10.2298/JMMB200207032P
关键词
Neodymium magnet; NdFeB recycling; Hydrogen decrepitation
Rare earth magnets based upon neodymium-iron-boron (NdFeB) are employed in many high tech applications, including hard disk drives (HDDs). The key elements in manufacturing NdFeB magnets are rare earth elements (REEs) such as neodymium. This element has been subject to significant supply shortfalls in the recent past. Recycling of NdFeB magnets contained within waste of electrical and electronic equipment (WEEE) could provide a secure and alternative supply of these materials. Various recycling approaches for the recovery of sintered NdFeB magnets have been widely explored. Hydrogen decrepitation (HD) can be used as a direct reuse approach and effective method of recycling process to turn solid sintered magnets into a demagnetised powder for further processing. In this work, sintered Nd-Fe-B magnets were processed without prior removal of the metallic protective layer using the thermal HD process as an alternative recycling method. The gas sorption analyzer was used to determine the quantity of the hydrogen absorbed by a samples of magnets, under controlled pressure (1, 2, 3, and 4 bar) and temperature (room, 100, 300, and 400 degrees C) conditions, using Sieverts' volumetric method. The composition and morphology of the starting and the extracted/disintegrated materials were examined by K'P, ARID, and SEM-EDS analysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据