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Sodium Nitrate Passivation as a Novel Insulation Technology for Soft Magnetic Composites Article

Mi Yan, Qiming Chen, Dong Liu, Chen Wu, Jian Wang

Engineering 2023, Volume 20, Issue 1,   Pages 134-142 doi: 10.1016/j.eng.2022.01.016

Abstract: nitrate passivation has been developed as a new insulation technology for the production of FeSiAl soft magneticcomposites (SMCs).growth is explained from both thermodynamic and kinetic perspectives and is correlated to the soft magnetic

Keywords： Soft magnetic composites     Surface passivation     Insulation technology     Growth mechanism     Magnetic performance    

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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

Abstract:

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    

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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

Abstract: The magnetic leakage field distribution resulting from linear defects of a tube sample in the geomagneticfield is modeled according to the magnetic dipole theory.The formula to compute the normal component of the weak magnetic field is deduced based on the spatialdistribution of the magnetic dipole.The shape and characteristics of the zero line (an important criterion for magnetic memory testing) of

Keywords： geomagnetic     theory     important criterion     magnetic leakage     normal component    

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Mixed mode properties of CNT reinforced composites using Arcan test rig

Jacob MUTHU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 397-404 doi: 10.1007/s11709-015-0321-y

Abstract: Composite materials reinforced with carbon nanotubes were mechanical tested using Arcan test rig under Mode-I, Mode-II and mixed mode loading conditions to obtain their fracture properties. The butterfly composite specimens were fabricated with 0.02, 0.05 and 0.1 wt % CNTs. The polyester/CNT composite was fabricated using VRTM (Vacuum Resin Transfer Molding) where the CNTs were first functionalised to reach an optimum properties. Arcan test rig was designed and fabricated to work with the Shimadzu testing machine. The results show that the functionalised CNTs have improved the fracture behavior by acting as bridge between the cracked face. In addition, the fracture properties were not improved for the higher weight fraction of 0.1 wt% CNTs.

Keywords： CNT     composites     Arcan test rig     stress intensity factor    

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Numerical modeling of nonlinear deformation of polymer composites based on hyperelastic constitutive

Qingsheng YANG, Fang XU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 284-288 doi: 10.1007/s11465-009-0067-0

Abstract: Fiber reinforced polymer (FRP) composites exhibit nonlinear and hyperelastic characteristics under finiteThis paper investigates the macroscopic hyperelastic behavior of fiber reinforced polymer compositesNumerical examples are given to demonstrate hyperelastic behavior and deformation of the composites,of the distribution pattern of fibers are also investigated to model the mechanical behavior of FRP composites

Keywords： composites     hyperelastic     finite deformation     homogenization     micromechanics    

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Fiber-reinforced composites in milling and grinding: machining bottlenecks and advanced strategies

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0680-8

Abstract: Fiber-reinforced composites have become the preferred material in the fields of aviation and aerospacedamage formation mechanisms and suppression strategies in milling and grinding for the fiber-reinforced compositesspecific aspects and explore new area for achieving high precision surface machining of fiber-reinforced composites

Keywords： milling     grinding     fiber-reinforced composites     damage formation mechanism     delamination     material removal    

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Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious composites

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 145-160 doi: 10.1007/s11709-022-0806-4

Abstract: In this study, sprayable strain-hardening fiber-reinforced cementitious composites (FRCC) were applied

Keywords： strain-hardening cementitious composites     engineered cementitious composites     sprayable     shotcrete     strengthening    

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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

Abstract: The size fractionation of magnetic nanoparticles is a technical problem, which until today can only beUsing magnetic chromatography, we show a promising method for fractionation of magnetic nanoparticleswith respect to their size and/or magnetic properties.This was achieved by passing magnetic nanoparticles through a packed bed of fine steel spheres with whichThe continuous feed stream of magnetic nanoparticles could be fractionated with a space-time-yield of

Keywords： magnetic chromatography     simulated moving bed chromatography     magnetic nanoparticles     size fractionation    

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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

Abstract:

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    

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Deformation characteristics of corrugated composites for morphing wings

Ruijun GE, Bangfeng WANG, Changwei MOU, Yong ZHOU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 73-78 doi: 10.1007/s11465-009-0063-4

Abstract: FEM models are established and solved to predict the characteristics of the composites by the commercialTo reflect the stretching superiority of the configuration, the elongation of corrugated and flat compositesThe linear cumulative effect of corrugated composites deformation is proved by calculating the elongationof the composites with several different corrugation numbers.manufactured and tested to verify the results of numerical analysis and the equivalent elastic modulus of the composites

Keywords： corrugated composites     deformation characteristic     numerical analysis     experiment    

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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

Abstract: The scale inhibition of PASP composite and the effect of its synergism with a magnetic field on scaleexperiments show that the chelating function of PASP composite for Ca can be enhanced by synergism with a magnetic650 mg/L, HCO 1,300 mg/L and PASP composite 4 mg/L, the scale inhibition rate of PASP composite in magnetic

Keywords： synergism     magnetic     PBTCA     dynamic     acid–acrylic acid–acrylic    

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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

Abstract: The differences of the ionic magnetic moment among rare earths are greater than that of ionic radius.Herein, a novel method based on the large ionic magnetic moment differences of rare earth elements wasionic liquid, then the ordering degree of them was improved with the Z-bond effect, and finally the magneticEr/Ho as examples, the results showed that Er(III) and Ho(III) containing ionic liquids had obvious magneticMagnetic separation via quasi-liquid system strategy provides a possibility of the novel, green, and

Keywords： rare earth element     different magnetic moment     magnetic separation     ionic liquid    

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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

Abstract: A new engine system, essentially consisting of a permanent NdFeB magnet, a kerosene-based magnetic fluidand a rotor, is proposed based on the thermomagnetic effect of a temperature-sensitive magnetic fluidThe rotor was driven by the thermal convection of the magnetic fluid in the presence of a homogeneousexternal magnetic field.The performance of the motor is considerably influenced by the magnetic field imposed.

Keywords： magnetic fluid     thermomagnetic effect     engine    

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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

Abstract: Rotation magnetic beacons magnetic field strength is very important to drill parallel horizontal twinthere is a length of 12.6 mm with permanent magnet, and in the middle, there is a length of 78 mm with magneticThe magnetic field strength generated by the magnetic material of 1J12, 1J50, and 1J79 is analyzed, respectivelyANSOFT software is used to simulate the magnetic field strength generated by different magnetic materials

Keywords： rotating magnetic beacons     steam assisted gravity drainage (SAGD)     ANSOFT    

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Fabrication of ionic polymer-metal composites (IPMCs) and robot design

Hanmin PENG, Qingjun Ding, Huafeng LI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 332-338 doi: 10.1007/s11465-009-0046-5

Abstract: a method for preliminary manufacturing experiments on a type of smart materials—ionic polymer-metal composites

Keywords： ionic polymer-metal composites (IPMCs)     artificial muscles     actuator     bionic robot     platinum-plated    

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Title Author Date Type Operation

Sodium Nitrate Passivation as a Novel Insulation Technology for Soft Magnetic Composites

Mi Yan, Qiming Chen, Dong Liu, Chen Wu, Jian Wang

Journal Article

Perspective and Prospects for Rare Earth Permanent Magnets

J.M.D. Coey

Journal Article

Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia, ZHANG Weimin, LIU Hongguang

Journal Article

Mixed mode properties of CNT reinforced composites using Arcan test rig

Jacob MUTHU

Journal Article

Numerical modeling of nonlinear deformation of polymer composites based on hyperelastic constitutive

Qingsheng YANG, Fang XU

Journal Article

Fiber-reinforced composites in milling and grinding: machining bottlenecks and advanced strategies

Journal Article

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious composites

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

Deformation characteristics of corrugated composites for morphing wings

Ruijun GE, Bangfeng WANG, Changwei MOU, Yong ZHOU,

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

Fabrication of ionic polymer-metal composites (IPMCs) and robot design

Hanmin PENG, Qingjun Ding, Huafeng LI

Journal Article