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非晶电机定子铁芯的制备工艺及最新研究进展

功能材料 2024年第4期55卷 4080-4093页

作者：施飞罗剑安静赵晨阳牟星徐立红郭世海钢铁研究总院有限公司功能材料研究院北京100081

非晶合金凭借优异的综合软磁性能,尤其是在高频下有着极低的损耗而在高速电机领域备受关注。概述了非晶电机的优势和类型,综述了非晶定子铁芯的关键制备工艺,对比了径向叠压和轴向卷绕铁芯、模块拼接和整体成型铁芯以及有槽和无槽铁芯... 详细信息

非晶合金凭借优异的综合软磁性能,尤其是在高频下有着极低的损耗而在高速电机领域备受关注。概述了非晶电机的优势和类型,综述了非晶定子铁芯的关键制备工艺,对比了径向叠压和轴向卷绕铁芯、模块拼接和整体成型铁芯以及有槽和无槽铁芯的各自优缺点。从退火处理、浸胶固化以及加工成型方式的角度总结了上述制备工艺对非晶带材和铁芯的性能影响。最后,结合非晶电机的最新研究进展,分析了当前非晶合金应用于电机定子铁芯存在的问题,并对未来非晶电机定子铁芯加工方法的发展进行了展望。

关键词：非晶合金非晶电机定子铁芯损耗制备工艺

Structure and electrochemical hydrogen storage behaviors of Mg-Ce-Ni-Al-based alloys prepared by mechanical milling

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Journal of Rare Earths 2020年第10期38卷 1093-1102,I0003页

作者： Yanghuan Zhang Pengpeng Wang Wei Zhang Wengang Bu Yan Qi shihai guo Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010China Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China

The influences of milling time and Ce content on the electrochemical property and micro structure of asmilled Mg1-xCexNi0.9Al0.1(x=0,0.02,0.04,0.06,0.08)+50 wt%Ni alloys were investigated *** as-milled alloys have an outstanding activation *** cycle stability conspicuously grows up with milling time and Ce proportion *** capacity retention rate at 100 th cycle of x=0.02 alloy augments from 47% to 63% when prolonging milling time from 5 to 30 h and it grows from55% to 82% for the 30 h milled alloy with Ce content growing from 0 to *** discharge capacity of x=0.02 alloy grows up invariably with milling time prolonging,while that of the 30 h milled alloys has the maximal value of 578.4 mAh/g with Ce content ***,the electrochemical kinetic properties of alloys significantly improve with milling duration extending,while they have the maximal values with Ce proportion varying.

关键词： Mg-based alloy Ce substituting Mg Mechanical milling Electrochemical property Rare earths

Structure and Electrochemical Hydrogen Storage Properties of as-Milled Mg-Ce-Ni-Al-Based Alloys

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Acta Metallurgica Sinica(English Letters) 2020年第5期33卷 630-642页

作者： Yanghuan Zhang Zhenyang Li Wei Zhang Wengang Bu Yan Qi shihai guo Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010China Department of Functional Material Research Central Iron and Steel Research InstituteNo.76 Xueyuannan RoadHaidian DistrictBeijing 100081China

At room temperature,crystalline Mg-based alloys,including Mg2 Ni,MgNi,REMg12 and La2 Mg17,have been proved with weak electrochemical hydrogen storage *** improving their electrochemical property,the Mg is partially substituted by Ce in Mg-Ni-based alloys and the surface modification treatment is performed by mechanical coating *** milling is utilized to synthesize the amorphous and nanocrystalline Mg1-xCexNi0.9Al0.1(x=0,0.02,0.04,0.06,0.08)+50 wt%Ni hydrogen storage *** effects made by Ce substitution and mechanical milling on the electrochemical hydrogen storage property and structure have been *** shows that the as-milled alloys electrochemically absorb and desorb hydrogen well at room *** as-milled alloys,without any activation,can reach their maximal discharge capacities during first *** maximal value of the 30-h-milled alloy depending on Ce content is 578.4 mAh/g,while that of the x=0.08 alloy always grows when prolonging milling *** maximal discharge capacity augments from337.4 to 521.2 mAh/g when milling duration grows from 5 to 30 *** cycle stability grows with increasing Ce content and milling ***,the S100 value augments from 55 to 82%for the alloy milled for 30 h with Ce content rising from 0 to 0.08 and from 66 to 82%when milling the x=0.08 alloy mechanically from 5 to 30 *** alloys’electrochemical dynamics parameters were measured as well which have maximum values depending on Ce content and keep growing up with milling duration extending.

关键词： Mg-Ni-based alloy Ce substituting Mg Surface modification Mechanical milling Electrochemical performance

Phase transformation,thermodynamics and kinetics property of Mg90Ce5RE5(RE=La,Ce,Nd)hydrogen storage alloys

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Journal of Materials Science & Technology 2020年第16期47卷 84-93页

作者： Hui Yong shihai guo Zeming Yuan Yan Qi Dongliang Zhao Yanghuan Zhang Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010China

The Mg90Ce5 RE5(RE=La,Ce,Nd)alloys were prepared by a vacuum induction furnace and their micro structure,phase transformation,thermodynamics and kinetics property were systematically studied by XRD,SEM,TEM,and PCT characterization *** result shows that the activated alloys are composed of Mg/MgH2 and corresponding REH2+x with *** REH2+x grain with Ce and La or Nd functional group have lower nucleation potential barriers than CeH2+x grains as the nucleation location,thus improve the hydrogen absorption kinetics of these alloys among which the Mg90Ce5Nd5 alloy can absorb 90%of the hydrogen within 2 min at 320℃.In addition,the Mg90Ce10 alloy has the lowest activation energy with 103.2 kJ mol-1 and the fastest desorption kinetics,which can release 5 wt%of the hydrogen within 20 min at 320℃.This is a correlation with grain size and the in-suit formed CeH2.73/CeO2 ***,the co-doping Ce and La or Nd can effectively disorganize the thermodynamic stability of Mg-based hydrogen storage alloys to a certain degree,but the dehydrogenation kinetics of that still is restricted by the recombination energy of hydrogen ions on the surface.

关键词： RE-Mg-based alloy Hydrogen storage Thermodynamics Kinetics Intermetallic

A comparison study of hydrogen storage properties of as-milled Sm_5Mg_(41) alloy catalyzed by CoS_2 and MoS_2 nano-particles

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Journal of Materials Science & Technology 2018年第10期34卷 1851-1858页

作者： Zeming Yuan Bangwen Zhang Yanghuan Zhang shihai guo Xiaoping Dong Dongliang Zhao InstrumentalAnalysis Center Inner Mongolia University of Science and Technology Baotou 014010 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Baotou 014010China Department of Mechanical Engineering Hebei University Baoding 071002 China

The influences of the catalysts of CoS2 and MoB2 nano-particles on microstructure and hydrogen stor-age behaviors of as-milled SmsMg41 alloy have been compared in this work. The SmsMg41 ＋ 5 wt.% M （M = COS2, MoS2） alloys were prepared by milling the mechanical ground as-cast SmsMg41 alloy powders （particle size ≤75 μm） with 5 wt.% CoS2 or MoS2 nano-particles （particle size ≤ 30 nm）, respectively. The results demonstrate that the CoS2 and MoS2 nanoparticles are embedded into the alloy surface, which is nanostructure containing some crystal defects, such as dislocation, grain boundary and twin etc. Those microstructures play a beneficial role in reducing the total potential barrier that the hydrogen absorption or desorption reactions must overcome, hence improving the hydrogen storage kinetics of the alloys. The as-milled alloys are composed of SmsMg41 and SmMg3 phases, and ball milling refines their crys-tal grains. The MgH2 and Sm3H7 phases appear after hydrogenation, while Mg and Sm3H7 phases exist after dehydrogenation. The dehydriding activation energy of M = CoS2 and MoS2 alloys are 101.67 and 68.25 kJ/mol H2 respectively. The initial hydrogen desorption of M = CoS2 and MoS2 alloys are 252.9 ℃ and 247.8 ℃.The hydrogenation and dehydrogenation enthalpy changes of M = MoS2 alloy are a little smaller than that of MzCoS2 alloy. Therefore, the catalyst MoS2 can improve the as-milled SmsMg41 alloy in hydrogen storage property more effectively than C0S2.

关键词： SmsMg41 alloy CoS2 and MoS2 catalyst Milling Activation energy Hydrogen storage kinetics

Effects of substituting Ni with M (M=Cu, Al and Mn) on microstructures and electrochemical characteristics of La-Mg-Ni system (PuNi_3-type) electrode alloys

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Rare Metals 2006年第Z1期25卷 25-32页

作者： ZHANG Yanghuan ZHAO Dongliang DONG Xiaoping REN Huiping guo shihai WANG Xinlin Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China School of Material Inner Mongolia University of Science and Technology Baotou 014010 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China School of Material University of Science and Technology Beijing Beijing 100083 China School of Material Inner Mongolia University of Science and Technology Baotou 014010 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China

In order to improve the electrochemical cycle stability of La-Mg-Ni system (PuNi3-type) hydrogen storage alloy, Ni in the alloys was partially substituted by M (M=Cu, Al, Mn). A new La-Mg-Ni system electrode alloys La0.7Mg0.3Ni2.55-xCo0.45Mx (M=Cu, Al, Mn; x=0, 0.1) were prepared by casting and rapid quenching. The effects of element substitution and rapid quenching on the microstructures and electrochemical performances of the alloys were investigated. The results by XRD, SEM and TEM show that the alloys have a multiphase structure, including the (La, Mg)Ni3 phase, the LaNi5 phase and the LaNi2 phase. The rapid quenching and element substitution have an imperceptible influence on the phase compositions of the alloys, but both change the phase abundance of the alloys. The rapid quenching significantly improves the composition homogeneity of the alloys and markedly decreases the grain size of the alloys. The Cu substitution promotes the formation of an amorphous phase in the as-quenched alloy, and a reversal result by the Al substitution. The electrochemical measurement indicates that the element substitution decreases the discharge capacity of the alloys, whereas it obviously improves the cycle stability of the alloys. The positive influence of element substitution on the cycle life of the alloys is in sequence Al>Cu>Mn, and negative influence on the discharge capacity is in sequence Al>Mn>Cu. The rapid quenching significantly enhances the cycle stability of the alloys, but it leads to a different extent decrease of the discharge capacity of the alloys.

关键词： element substitution rapid quenching La-Mg-Ni system electrode alloy microstructures electrochemical performances

Structure and hydrogen storage characteristics of as-spun Mg-Y-Ni-Cu alloys

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Journal of Materials Science & Technology 2019年第8期35卷 1727-1734页

作者： Yanghuan Zhang Pengpeng Wang Zhonghui Hou Zeming Yuan Yan Qi shihai guo Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Baotou 014010 China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China

Experimental alloys with compositions of Mg(25-x)YxNi9Cu(x=0,1,3,5,7)have been successfully prepared through melt spinning *** phase compositions and microstructures were measured by X-Ray diffraction(XRD)and high-resolution transmission electron microscopy(HRTEM).The de-/hydrogenation properties were measured by utilizing Sievert apparatus,differential scanning calorimetry(DSC)and thermal gravimetric analyzer(TGA)connected with a H2 *** Arrhenius and Kissinger methods were adopted to calculate their dehydrogenation activation *** results show that hydrogen absorption kinetics of the alloys notably decline while their hydrogen desorption kinetics conspicuously improve with spinning rate *** dehydrogenation activation energy markedly decreases with spinning rate increasing,which makes the hydrogen desorption kinetics *** thermodynamic parameters(H and S absolute values)clearly decrease with spinning rate *** hydrogen absorption capacity exhibits different trends with spinning rate ***,hydrogen absorption capacity increases at the beginning and declines later for Y1 alloy,but that of Y7 alloy always decreases with spinning rate growing.

关键词： Mg-Ni-based alloy Thermodynamics Activation energy Melt spinning Hydrogen storage kinetics

Hydrogen storage behavior of Mg-based alloy catalyzed by carbon-cobalt composites

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Journal of Magnesium and Alloys 2021年第6期9卷 1977-1988页

作者： Hui Yong Xin Wei Jifan Hu Zeming Yuan shihai guo Dongliang Zhao Yanghuan Zhang School of Materials Science&Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Laboratory of Magnetic and Electric Functional Materials and the Applications The Key Laboratory of Shanxi ProvinceTaiyuan 030024China Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010China

The composites comprised of Co nanoparticle and C nanosheet were prepared though a high-temperature carbonization *** catalysis of Co@C composites on the hydrogen storage behavior of Mg_(90)Ce_(5)Y_(5)alloy was investigated in detail by XRD,SEM,TEM,PCI,and DSC *** of the synergistic catalytic function of C and Co in C@Co nanocomposites,the Mg_(90)Ce_(5)Y_(5)alloy with 10 wt.%C@Co shows the excellent hydrogen absorption and desorption *** for releasing hydrogen reduces from 150 min to 11 min with the addition of the C@Co composites at the temperature of 300℃.Meanwhile,the dehydrogenation activation energy also declines from 130.3 to 81.9 kJ mol^(-1)H_(2)after the addition of the C@Co *** positive effect attributes to the C layer with the high defect density and the Co nanoparticles,which reduces the energy barriers for the nucleation of Mg/MgH_(2)phase and the recombination of hydrogen ***,the C@Co composites also improve the activation property of the Mg_(90)Ce_(5)Y_(5)alloy which was folly activated in the first ***,the temperature for initial dehydrogenation and the endothermic peak of the alloy hydride were also *** the addition of the C@Co composites increases the plateau pressures and decreases the value of the decomposition enthalpy,these differences are so small that the improvement on thermodynamics can hardly be seen.

关键词： Hydrogen storage Mg-based alloy Kinetics Thermodynamics Synergistic effect Nanocomposites

Highly Improved Electrochemical Performances of the Nanocrystalline and Amorphous Mg_2Ni-type Alloys by Substituting Ni with M (M=Cu,Co,Mn)

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Journal of Wuhan University of Technology(Materials Science) 2017年第3期32卷 685-694页

作者：张羊换 YUAN Zeming YANG Tai ZHAI Tinging LIU Zhuocheng guo shihai Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Department of Functional Material Research Central Iron and Steel Research Institute

The element Ni in the Mg2Ni alloy is partially substituted by M（M = Cu, Co, Mn） in order to ameliorate the electrochemical hydrogen storage performances of Mg2Ni-type electrode alloys. The nanocrystalline and amorphous Mg20Ni10-xMx（M = None, Cu, Co, Mn; x = 0-4） alloys were prepared by melt spinning. The effects of the M（M = Cu, Co, Mn） content on the structures and electrochemical hydrogen storage characteristics of the as-cast and spun alloys were comparatively studied. The analyses by XRD, SEM and HRTEM reveal that all the as-cast alloys have a major phase of Mg2Ni but the M（M = Co, Mn） substitution brings on the formation of some secondary phases, MgCo2 and Mg for the（M = Co） alloy, and Mn Ni and Mg for the（M = Mn） alloy. Besides, the as-spun（M = None, Cu） alloys display an entirely nanocrystalline structure, whereas the as-spun（M = Co, Mn） alloys hold a nanocrystalline/amorphous structure, suggesting that the substitution of M（M = Co, Mn） for Ni facilitates the glass formation in the Mg2Ni-type alloys. The electrochemical measurements indicate that the variation of M（M = Cu, Co, Mn） content engenders an obvious effect on the electrochemical performances of the as-cast and spun alloys. To be specific, the cyclic stabilities of the alloys augment monotonously with increasing M（M = Cu, Co, Mn） content, and the capacity retaining rate（S20） is in an order of（M = Cu）〉（M = Co）〉（M = Mn）〉（M = None） for x≤1 but changes to（M = Co）〉（M = Mn）〉（M = Cu）〉（M = None） for x≥2. The discharge capacities of the as-cast and spun alloys always grow with the rising of M（M = Co, Mn） content but first mount up and then go down with increasing M（M = Cu） content. Whatever the M content is, the discharge capacities are in sequence：（M = Co）〉（M = Mn）〉（M = Cu）〉（M = None）. The high rate discharge abilities（HRDs） of all the alloys grow clearly with rising M（M = Cu, Co） content except for（M = Mn） alloy, whose HRD has a maximum value with varying M（M = Mn） content. Furthermore, for the as-

关键词： Mg2Ni-type alloy element substitution melt spinning nanocrystalline and amorphous electrochemical performances