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Perspective and Prospects for Rare Earth Permanent Magnets Review
J.M.D. Coey
Engineering 2020, Volume 6, Issue 2, Pages 118-130 doi: 10.1016/j.eng.2018.11.034
Rare earth permanent magnets constitute a mature technology, but the shock of the 2011 rare earth crisis led to the re-evaluation of many ideas from the 1980s and 1990s about possible new hard magnets containing little or no rare earth (or heavy rare earth). Nd–Fe–B magnets have been painstakingly and skillfully optimized for a wide range of applications in which high performance is required at reasonable cost. Sm–Co is the material of choice when high-temperature stability is required, and Sm–Fe–N magnets are making their way into some niche applications. The scope for improvement in these basic materials by substitution has been rather thoroughly explored, and the effects of processing techniques on the microstructure and hysteresis are largely understood. A big idea from a generation ago—which held real potential to raise the record energy product significantly—was the oriented exchange-spring hard/soft nanocomposite magnet; however, it has proved very difficult to realize. Nevertheless, the field has evolved, and innovation has flourished in other areas. For example, electrical personal transport has progressed from millions of electric bicycles to the point where cars and trucks with electrical drives are becoming mainstream, and looks ready to bring the dominance of the internal combustion engine to an end. As the limitations of particular permanent magnets become clearer, ingenuity and imagination are being used to design around them, and to exploit the available mix of rare earth resources most efficiently. Huge new markets in robotics beckon, and the opportunities offered by additive manufacturing are just beginning to be explored. New methods of increasing magnet stability at elevated temperature are being developed, and integrated multifunctionality of hard magnets with other useful properties is now envisaged. These themes are elaborated here, with various examples.
Keywords: Rare earth magnets Magnetic anisotropy Coercivity Energy product Magnetic composites Additive manufacturing
Li Wei,Zhu Minggang
Strategic Study of CAE 2011, Volume 13, Issue 10, Pages 4-12
Keywords: nanoscale Nd-Fe-B magnets hot press-hot deformation anisotropy magnetic domains
Modeling and analysis of magnetic dipoles in weak magnetic field
WANG Zhaoxia, ZHANG Weimin, LIU Hongguang
Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2, Pages 222-225 doi: 10.1007/s11465-008-0028-z
Keywords: geomagnetic theory important criterion magnetic leakage normal component
Lianyang ZHANG
Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2, Pages 102-116 doi: 10.1007/s11709-013-0201-2
Keywords: rock permeability discontinuity stress temperature scale effect anisotropy
Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography
Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb
Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5, Pages 1346-1355 doi: 10.1007/s11705-021-2040-3
Keywords: magnetic chromatography simulated moving bed chromatography magnetic nanoparticles size fractionation
Magnetostriction varieties and stress relief caused by pulsed magnetic field
Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO
Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 354-358 doi: 10.1007/s11465-011-0123-4
Magnetostriction is investigated to evaluate the stress relief caused by pulsed magnetic field treatmentThe stress variations caused by pulsed magnetic treatment are also compared.find that the product of magnetostriction amplitude and stress magnitude is nearly a constant during magnetic
Keywords: magnetostriction pulsed magnetic field treatment stress relief
Synergistic scale inhibition of polyaspartic acid composite with magnetic field
LIU Zhenfa, WANG Yanji, GAO Yuhua, ZHANG Lihui
Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3, Pages 261-265 doi: 10.1007/s11705-007-0047-z
Keywords: synergism magnetic PBTCA dynamic acid–acrylic acid–acrylic
Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy
Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10, Pages 1584-1594 doi: 10.1007/s11705-022-2189-4
Keywords: rare earth element different magnetic moment magnetic separation ionic liquid
A new miniaturized engine based on thermomagnetic effect of magnetic fluids
Lujun ZHOU, Yimin XUAN, Qiang LI, Wenlei LIAN
Frontiers in Energy 2009, Volume 3, Issue 2, Pages 160-166 doi: 10.1007/s11708-009-0018-9
Keywords: magnetic fluid thermomagnetic effect engine
Rotating magnetic beacons magnetic field strength size in SAGD
Bing TU, Desheng LI, Enhuai LIN, Bin LUO, Jian HE, Lezhi YE, Jiliang LIU, Yuezhong WANG
Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4, Pages 446-449 doi: 10.1007/s11465-010-0113-y
Keywords: rotating magnetic beacons steam assisted gravity drainage (SAGD) ANSOFT
Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1375-1
• AOA’s ammonia oxidizing capacity was enhanced under moderate magnetic
Keywords: Ammonia-oxidizing archaeon Ammonia oxidation Magnetic field Magnetotaxis Heredity
Fabrication of magnetic multi-template molecularly imprinted polymer composite for the selective and
Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-021-1395-5
• Magnetic multi-template molecularly imprinted polymer composite was
Keywords: Tetracyclines Removal Adsorption Molecularly imprinted polymer Magnetic graphene oxide
Discovery of the mechanisms of acupuncture in the treatment of migraine based on functional magnetic
Frontiers of Medicine Pages 993-1005 doi: 10.1007/s11684-023-0989-7
Keywords: acupuncture migraine fMRI metabolome proteome
Application of metal magnetic memory test in failure analysis and safety evaluation of vessels
Yiliang ZHANG, Song YANG, Xuedong XU
Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1, Pages 40-48 doi: 10.1007/s11465-009-0003-3
Keywords: Metal magnetic memory test (MMMT) nondestructive testing (NDT) residual stress propylene purifier ammonia
Magnetic confinement fusion: a brief review
Chuanjun HUANG, Laifeng LI
Frontiers in Energy 2018, Volume 12, Issue 2, Pages 305-313 doi: 10.1007/s11708-018-0539-1
Keywords: fusion energy magnetic confinement tokamak structural material superconducting magnet
Title Author Date Type Operation
Mechanism of hot-deformation and magnetic domains of anisotropic die-upset rare earth permanent magnets
Li Wei,Zhu Minggang
Journal Article
Modeling and analysis of magnetic dipoles in weak magnetic field
WANG Zhaoxia, ZHANG Weimin, LIU Hongguang
Journal Article
Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography
Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb
Journal Article
Magnetostriction varieties and stress relief caused by pulsed magnetic field
Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO
Journal Article
Synergistic scale inhibition of polyaspartic acid composite with magnetic field
LIU Zhenfa, WANG Yanji, GAO Yuhua, ZHANG Lihui
Journal Article
Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy
Journal Article
A new miniaturized engine based on thermomagnetic effect of magnetic fluids
Lujun ZHOU, Yimin XUAN, Qiang LI, Wenlei LIAN
Journal Article
Rotating magnetic beacons magnetic field strength size in SAGD
Bing TU, Desheng LI, Enhuai LIN, Bin LUO, Jian HE, Lezhi YE, Jiliang LIU, Yuezhong WANG
Journal Article
oxidation capacity of ammonia-oxidizing archaeon originated from wastewater: Utilizing low-density static magnetic
Journal Article
Fabrication of magnetic multi-template molecularly imprinted polymer composite for the selective and
Journal Article
Discovery of the mechanisms of acupuncture in the treatment of migraine based on functional magnetic
Journal Article
Application of metal magnetic memory test in failure analysis and safety evaluation of vessels
Yiliang ZHANG, Song YANG, Xuedong XU
Journal Article