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Direct synthesis of Fe-Si-B-C-Cu nanocrystalline alloys with superior soft magnetic properties and ductile by melt-spinning

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Journal of Materials Science & Technology 2022年第13期108卷 186-195页

作者： xingjie jia Bojun Zhang Wei Zhang Yaqiang Dong jiawei Li Aina He Run-Wei Li Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China University of Chinese Academy of Sciences Beijing 100049China

Structure,magnetic properties and ductile of melt-spun Fe_(83-x)Si_(4)B_(13-y)C_(y)Cu_(x)(x=0-1.7;y=0-8)alloys were *** addition of 1.7 at.%Cu in a Fe_(83)Si_(4)B_(13) amorphous alloy generates abundantα-Fe crystals by providing nucleation sites,and further C doping promotes the growth of the crystals by suitable turning amorphous-forming ability,hence they increase saturation magnetic flux density(B_(s))and slightly worse magnetic softness of the as-spun *** as-spun Fe_(81.3)Si_(4)B_(7)C_(6)Cu_(1.7) alloy possesses a combined structure of a fully amorphous layer in wheel side surface and predominating nanocrystalline structure with gradually enlargedα-Fe crystal,whose average size and volume fraction are determined as about 12 nm and 32%,respectively,therefore superior soft magnetic properties and ductile with a high B_(s)of 1.74 T,coercivity(H_(c))of 32.7 A/m,effective permeability(μ_(e),at 1 kHz)of 3200 and high relatively strain at fracture(ε_(f))of 3.61%can be achieved directly in this alloy by only using *** annealing at 578 K releases internal stress,promotes the growth of theα-Fe crystals and remains the amorphous layer of the Fe_(81.3)Si_(4)B_(7)C_(6)Cu_(1.7) alloy,then improves the soft magnetic properties and maintains the superior ductile with increasing the B_(s)andμ_(e)to 1.80 T and 14,100,respectively,lowering the H_(c)to9.4 A/m and slightly reducing theε_(f)to 2.39%.The combination of superior soft magnetic properties and ductile and simplified synthesis process entitles the Fe-Si-B-C-Cu nanocrystalline alloys great potentials in high performance electromagnetic applications.

关键词： Fe-based nanocrystalline alloys High saturation magnetic flux density Direct synthesis Melt-spinning Ductile

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Formation and crystallization behavior of Fe-based amorphous precursors with pre-existingα-Fe nanoparticles-Structure and magnetic properties of high-Cu-content Fe-Si-B-Cu-Nb nanocrystalline alloys

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Journal of Materials Science & Technology 2021年第6期65卷 171-181页

作者： Yanhui Li xingjie jia Wei Zhang Yan Zhang Guoqiang Xie Zhiyong Qiu Junhua Luan Zengbao jiao Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Institute for Materials Research Tohoku UniversitySendai 980-8577Japan School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Center for Advanced Structural Materials Department of Materials Science and EngineeringCity University of Hong KongHong KongChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Structure,crystallization behavior,and magnetic properties of as-quenched and annealed Fe_(81.3)Si_(4)O_(13)Cu_(1.7)(Cu1.7)alloy ribbons and effects of Nb alloying have been ***-dimensional atom probe and transmission electron microscopy analyses reveal that high-number-density Cu-clusters and Pre-existing Nano-sized a-Fe Particles(PN-a-Fe)are coexistence in the melt-spun Cu1.7 amorphous matrix,and the PN-α-Fe form by manners of one-direction adjoining and enveloping the ***-step crystallization behavior associated with growth of the PN-a-Fe and subsequent nucleation and growth of newly-formedα-Fe is found in the primary crystallization stage of the Cu1.7 *** number densities of the Cu-clusters and PN-a-Fe in melt-spun Fe8_(1.3-x)Si_(4)B_(13)Cu_(1.7)Nb_(x)alloys are gradually reduced with enriching of Nb,and a fully amorphous structure forms at 4 at.%Nb,although smaller Cu-clusters still *** annealing,2 at.%Nb coarsens the average size(D_(α-F)e)of theα-Fe grains from 14.0 nm of the Nb-free alloy to 21.6 nm,and 4 at.%Nb refines the D_(α-Fe)to 8.9 *** mechanisms of theα-Fe nucleation and growth during quenching and annealing for the alloys with large quantities of PN-α-Fe as well as after Nb alloying have been discussed,and an annealing-induced oc-Fe growth mechanism in term of the barrier co-contributed by competitive growth among the PN-a-Fe and diffusion-suppression effect of Nb atoms has been proposed.A coercivity(HC)αDα-Fe^(3)correlation has been found for the nanocrystalline alloys,and the permeability is inverse with the H_(C).

关键词： Fe-based nanocrystalline alloy Cu-cluster Pre-existingα-Fe nanoparticle Crystallization behavior Soft magnetic property

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Influence rules of early transition elements on rapid solidified structure and nanocrystallization behaviors of Fe-Si-B-Cu soft magnetic alloys with high Cu content

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Journal of Materials Science & Technology 2024年第17期184卷 157-166页

作者： xingjie jia Yaqiang Dong Wei Zhang Ling Zhang Yanqiu Li Aina He jiawei Li Wenjun Wang Baogen Shen Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China University of Chinese Academy of Sciences Beijing 100049China Niobium Product Department CITIC Metal Company LimitedBeijing 100004China

Unique rapid solidified structure and nanocrystallization mechanism enable the Fe-based nanocrystalline alloys with high Cu content excellent soft magnetic properties and good manufacturability,and also results in unusual phenomena in terms of alloying *** the present work,we systematically studied the influence rules of early transition elements on the rapid solidified structure and nanocrystallization behaviors of Fe-Si-B-Cu soft magnetic alloys with high Cu content and explored the related *** terms of rapid solidified structure,the additions of early transition elements always inhibit the for-mation of pre-existingα-Fe crystals even eliminate them,and the additions that could produce larger atomic mismatch parameter(δ)and negative mixing enthalpy(△H_(mix))show stronger *** terms of nanocrystallization behaviors,the increases inδand negative△H_(mix) weaken the competitive growth between the pre-existing nanocrystals during annealing and then coarsen the nanostructure of the an-nealed alloys and deteriorate their magnetic softness,while the excessive increases inδand negativeHmix could significantly suppress the growth ofα-Fe crystals by diffusion inhibition during annealing and thus remarkable refine the nanostructure of the annealed alloys and improve their magnetic softness.

关键词： Nanocrystalline soft magnetic alloys Early transition elements Rapid solidified structure Nanocrystallization behaviors Pre-existingα-Fe crystals

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Novel CoFeAlMn high-entropy alloys with excellentsoft magnetic properties and high thermal stability

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Journal of Materials Science & Technology 2023年第22期153卷 22-31页

作者： Wei Gao Yaqiang Dong xingjie jia Liping Yang Xubin Li Shouding Wu Ronglin Zhao Hang Wu Qiang Li Aina He jiawei Li Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology CAS Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China School of Physical and Technology Xinjiang UniversityUrumqiXinjiang 830000China University of Chinese Academy of Sciences Beijing 100049China

High-entropy alloys(HEAs),which are composed of 3d transition metals such as Fe,Co,and Ni,exhibit an exceptional combination of magnetic and other properties;however,the addition of non-ferromagnetic elements always negatively affects the saturation magnetization strength(M s).Co_(4)Fe_(2)Al_(x)Mn_(y) alloys were designed and investigated in this study to develop a novel HEA with excellent soft magnetic *** Co_(4)Fe_(2)Al_(1.5)Mn_(1.5) HEA possesses the highest M s of 161.3 emu g^(-1) thus far reported for magnetic HEAs,a low coercivity of 1.9 Oe,a high electrical resistivity of 173μΩ cm,a superior thermal stability up to 600℃,which originates from the novel microstructure of B2 nanoparticles distributed in a DO_(3) matrix phase,and the crucial transition of Mn from antiferromagnetism to ferromagnetism with the assistance of *** Co_(4)Fe_(2_)Al_(1.5)Mn_(1.5) HEA was selected to produce micron-sized powder and soft magnetic powder cores(SMPCs)for application in the exploration *** SMPCs exhibit a high stable effective perme-ability of 35.9 up to 1 MHz,low core loss of 38.1 mW cm^(-3)(@100 kHz,20 mT),and an excellent direct current(DC)bias performance of 87.7%at 100 *** study paves the way for the development of soft magnetic HEAs with promising applications as magnetic functional materials.

关键词： High-entropy alloys Soft magnetic powder cores Magnetic properties High saturation magnetization Magnetic domain

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Development of soft magnetic Fe-based bulk metallic glasses with excellent thermoplastic formability

Development of soft magnetic Fe-based bulk metallic glasses ...

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第二届海峡两岸功能材料科技与产业峰会（2015）

作者： Wei Zhang Haitao Miao xingjie jia Yanhui Li Dalian University of Technology

Fe-based bulk metallic glasses(BMGs)are attractive for the engineering applications as functional materials due to their excellent soft magnetic properties,very high strength,thermoplastic formability in the supercooled liquid region(ΔTx),and lower material *** Fe-based BMGs can be expected to produce soft magnetic micro/nano-parts and electromechanical devices by the thermoplastic ***,most of the

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河南舞钢铁矿地质特征及深部找矿研究

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黄金科学技术 2012年第2期20卷 25-31页

作者：贾兴杰李怀乾郑洪举中国地质大学地球科学与资源学院北京100083 河南省有色金属地质矿产局第四地质大队河南郑州450016 云南天大矿业有限公司云南昆明650011

通过对矿体地质特征、成矿地质条件及物探磁异常的分析研究,达到指导矿产勘查工作并预测找矿方向的目的;通过分析研究区内构造特征、地层对比及物探磁异常,指出研究区处在马超营断裂以北的俯冲带上,在F6断裂的作用下,地层发生自南向北... 详细信息

通过对矿体地质特征、成矿地质条件及物探磁异常的分析研究,达到指导矿产勘查工作并预测找矿方向的目的;通过分析研究区内构造特征、地层对比及物探磁异常,指出研究区处在马超营断裂以北的俯冲带上,在F6断裂的作用下,地层发生自南向北、自下而上的推动作用,使含矿地层由深到浅运移。区内存在赵案庄群和铁山庙组2个含矿层位,并构成"赵案庄型"和"铁山庙型"2种铁矿类型。研究认为矿床的形成与火山喷发密切相关,是在地表水作用下经过分选沉积而成。根据矿床成因特点,指出舞阳铁矿成为特大型矿床的成矿偏在性,认为该区带在深部有较大的找矿潜力。为配合目前的地质找矿工作,对找矿有利区段和资源量进行了预测。

关键词：地质特征深部找矿舞钢铁矿河南省

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河南省舞阳铁矿田找矿模型

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矿产与地质 2018年第2期32卷 251-256页

作者：贾兴杰李红超肖昶河南省有色金属地质矿产局第四地质大队河南郑州450016 河南省有色金属地质矿产局第二地质大队河南郑州450016 河南省有色金属地质矿产局第五地质大队河南郑州450016

20世纪50至70年代和2011—2013年,在舞阳铁矿田内共提交铁矿石资源储量超过10亿吨,达到了超大型规模。舞阳铁矿田形成铁矿层的地层有赵案庄组、铁山庙组和杨树湾组,前两者能够形成大型或超大型矿床。赵案庄组所形成的矿层由原来的赵案... 详细信息

20世纪50至70年代和2011—2013年,在舞阳铁矿田内共提交铁矿石资源储量超过10亿吨,达到了超大型规模。舞阳铁矿田形成铁矿层的地层有赵案庄组、铁山庙组和杨树湾组,前两者能够形成大型或超大型矿床。赵案庄组所形成的矿层由原来的赵案庄矿层及其东部未进行资源储量估算的下曹余庄矿区和在2011—2013年普查中所控制的深部矿体组成,矿体自北西到南东基本相连。铁山庙组所形成的矿层由原来的经山寺矿矿区和铁山矿区及在2011—2013年普查中所控制的深部矿体组成,在经山寺矿区南侧铁山庙组矿层被赵案庄组所隔断,分为两个大区。通过总结最新整装勘查成果与科研成果,建立了舞阳铁矿田成矿-找矿模型,为国内外寻找该类型矿床及在该区进一步开展找矿工作提供参考。

关键词：舞阳铁矿田条带状铁建造(简称BIF) 赵案庄式铁矿床铁山庙式铁矿床成矿-找矿模型

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河南舞阳铁矿田经山寺矿床外围找矿方向研究

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黄金科学技术 2012年第1期20卷 54-60页

作者：李怀乾沈柳生贾兴杰河南省有色金属地质矿产局第四地质大队河南郑州450016 天津华北地质勘查局天津300181

经山寺矿床是舞阳铁矿田内的三大矿床之一。目前,在经山寺矿区500 m以上已探明资源储量22 409万t,其外围仍有较大的找矿潜力。根据矿体的基本地质特征和构造变动特点,分析该区矿床成因类型、找矿潜力和找矿方向,为该区找矿工作提供理论... 详细信息

经山寺矿床是舞阳铁矿田内的三大矿床之一。目前,在经山寺矿区500 m以上已探明资源储量22 409万t,其外围仍有较大的找矿潜力。根据矿体的基本地质特征和构造变动特点,分析该区矿床成因类型、找矿潜力和找矿方向,为该区找矿工作提供理论支撑,并达到实现找矿重大突破的目的。研究认为,矿床是在滨海环境下直接沉积形成的,矿床类型为与绿岩带有关的阿尔戈马型条带状建造铁矿床。在矿区已控制的范围内,矿层继续向深部延伸且厚度无变薄趋势;另外,矿区西侧外围及南侧500 m以下仍有较大的找矿空间,下一步找矿方向应锁定在经山寺至铁山矿区的15 km范围内,以及从舞钢市姚庄至叶县南房庄20 km内的三角地带。

关键词：地质特征矿床成因找矿方向舞阳铁矿田河南省

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基于Φ-OTDR的海风机与海底电缆在线状态监测方法

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光电子技术 2023年第1期43卷 53-61页

作者：陈勇张驰丁哲文冯磊贾星杰赵世松王健张益昕中广核(北京)新能源科技有限公司北京100822 南京大学现代工程与应用科学学院南京210033 南京法艾博光电科技有限公司南京211135

利用自研的Φ-OTDR系统,在福建省某海上风电场开展了演示验证,实现了对海风机机组的启动-运行-停机等不同工况下的状态分析与诊断,总结了不同工况下的振动特征及诊断依据;以及针对海底电缆的水流冲击、锚害拖拽、抵近船只航行等监测预... 详细信息

利用自研的Φ-OTDR系统,在福建省某海上风电场开展了演示验证,实现了对海风机机组的启动-运行-停机等不同工况下的状态分析与诊断,总结了不同工况下的振动特征及诊断依据;以及针对海底电缆的水流冲击、锚害拖拽、抵近船只航行等监测预警功能,总结了不同海缆状态下及周边环境感知目标事件特征。实测结果证明该方案能够在线监测海风机与海底电缆状态,并有效感知周围环境,为提升海上风电场运维水平提供了可靠的技术途径。

关键词：相位敏感光时域反射海底电缆海风机锚害水流冲击工况分析

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Construction of AIEgen functionalized nanomicelles and their stability study through‘seesaw-like'fluorescence changes

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Chinese Chemical Letters 2023年第6期34卷 382-386页

作者： Xiaotong Wang Shizhu Chen Yaru jia Kaihan Zhang Lili Ma Luwei Li xingjie Liang Jinchao Zhang College of Chemistry and Environmental Science Chemical Biology Key Laboratory of Hebei ProvinceKey Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of EducationHebei UniversityBaoding 071002China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology of ChinaBeijing 100190China Department of Chemistry The University of ManchesterManchester M139PLUnited Kingdom

As nanocarriers,nanomicelles play vital roles in the toolbox of drug *** stability of nanomicelles affects the nanomedicines'***,it is important to understand the stability of nanomicelles for further ***,we report a strategy to construct new nanomicelles(NM)by introducing aggregation-induced emission(AIE)functional group tetraphenylethylene(TPE)in the component polymer vitamin E(D-α-tocopheryl polyethylene glycol 1000 succinate)(TPGS).The stability of doxorubicin(DOX)loaded nanomicelles DOX@NM in different conditions was studied by fluorescence *** fluorescence changes of DOX@NM are‘seesaw-like'when they transform between assembled and disassembled *** the assembled form,TPE gives emission from AIE effect,while in the disassembled form,the fluorescence of DOX is observed due to the disappearance of ACQ effect.

关键词： Polymer nanomicelles Aggregation-induced emission Fluorescence ratio Stability Drug delivery system

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