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Journal of Rare Earths 2009年第3期27卷 514-519页

作者：张羊换赵栋梁任慧平郭世海王青春王新林 Department of Functional Material Research Central Iron and Steel Research Institute School of Material Inner Mongolia University of Science and Technology

In order to improve the hydrogenation and dehydrogenation performances of the Mg2Ni-type alloys, Mg was partially substituted by La in the alloy, and melt spinning technology was used for the preparation of the Mg20-xLaxNi10 （x=0, 2, 4, 6） hydrogen storage alloys. The structures of the alloys were studied by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and high-resolution transmission electron microscopy （HRTEM）. It was found that no amorphous phase formed in the as-spun La-free alloy, but the as-spun alloys containing La held a major amorphous phase. When La content x≤2, the major phase in the as-cast alloys was Mg2Ni phase, but with further increase of La content, the major phase of the as-cast alloys changed into LaNi5＋LaMg3 phase. Thermal stability of the as-spun alloys was studied by differential scanning calorimetry （DSC）, showing that spinning rate was a negligible factor on the crystallization temperature of the amorphous phase. The hydrogen absorption and desorption kinetics of the as-cast and as-spun alloys were measured using an automatically controlled Sieverts apparatus, confirming that the hydrogen absorption and desorption capacities and kinetics of the as-cast alloys clearly increased with rising La content. For La content x=2, the as-spun alloy displayed optimal hydrogen desorption kinetics at 200 ℃.

关键词： Mg2Ni-type hydrogen storage alloy melt-spinning structure hydriding and dehydriding characteristics rare earths

A Novel Nano/Micro-Fibrous Scaffold by melt-spinning Method for Bone Tissue Engineering

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Journal of Bionic Engineering 2015年第1期12卷 117-128页

作者： Liguo Cui Ning Zhang Weiwei Cui Peibiao Zhang Xuesi Chen Key Laboratory of Polymer Ecobiomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Chinese Academy of Sciences Beijing 100039 China Department of Bone and Joint Surgery First Hospital of Jilin University Changchun 130021 China School of Public Health Jilin University Changchun 130021 China

In order to architecturally and functionally mimic native Extracellular Matrix （ECM）, a novel micro/nano-fibrous scaffold of hydroxyapetite/poly（lactide-co-glycolide）（HA/PLGA） composite was successfully prepared by melt-spinning method. A porous three-dimensional scaffold fabricated by melt-molding particulate-leaching method was used as control. This kind of scaffold comprising both nanofiber and microfiber had an original structure including a nano-network favorable for cell adhe- sion, and a micro-fiber providing a strong skeleton for support. The microfibers and nanofibers were blended homogeneously in scaffold and the compression strength reached to 6.27 MPa, which was close to human trabecular bone. The typical mi- cro/nano-fibrous structure was more benefcial for the proliferation and differentiation of Bone Mesenehymal Stem Cells （BMSCs）. The calcium deposition and Alkaline Phosphatase （ALP） activity were evaluated by the differentiation of BMSCs, and the results indicated that the temporary ECM was very beneficial for the differentiation of BMSCs into maturing osteoblasts. For repairing rabbit radius defects in vivo, micro/nano-fibrous scaffold was used for the purpose of rapid bone remodeling in the defect area. The results showed that a distinct bony callus of bridging was observed at 12 weeks post-surgery and the expression of osteogenesis-related genes （bone-morphogenetic protein-2, Osteonectin, collagen-I） increased because of the ECM-like structure. Based on the results, the novel micro/nano-fibrous scaffold might be a promising candidate for bone tissue engi- neering.

关键词： PLGA-based scaffold melt-spinning nano/micro-fibers bone tissue engineering

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

Single phase A2B7-type La-Mg-Ni alloy with improved electrochemical properties prepared by melt-spinning and annealing

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Journal of Rare Earths 2019年第12期37卷 1305-1311页

作者： Yiming Li Zhuocheng Liu Guofang Zhang Yanghuan Zhang Huiping Ren Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and Technology

La-Mg-Ni alloys were prepared by melt-spinning with different cooling rates and followed by *** of the cooling rate leads to refinement of the grains size and increasing of the abundance of *** is favorable to formation of the A2 B7-type phase and promotes the discharge capacity,cycling stability and high rate discharge ability of the as-spun *** constitution of the annealed alloys is found to be closely related to the microstructure of the as-spun alloys.A single phase A2 B7-type microstructure is obtained in the annealed alloy which is attributed to the lower abundance of the LaNis of the original alloy spun with lower cooling *** of the single phase A2 B7-type microstructure is also ascribed to the isolated and homogeneous distribution of the morphology of the as-spun *** single phase alloy presents higher discharge capacity and better cycling stability compared with other annealed alloys.

关键词： La-Mg-Ni electrode alloys melt-spinning Annealing Single phase microstructure Electrochemical properties Rare earths

Electrochemical hydrogen storage characteristics of nanocrystalline and amorphous Mg_2Ni-type alloys prepared by melt-spinning

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Transactions of Nonferrous Metals Society of China 2011年第3期21卷 502-511页

作者：张羊换吕科赵栋梁郭世海祁焱王新林钢铁研究总院功能材料研究所北京100081 内蒙古科技大学国家重点实验室培育基地包头014010

The nanocrystalline and amorphous Mg2Ni-type alloys with nominal compositions of Mg2Ni1-xMnx （x=0, 0.1, 0.2, 0.3, 0.4） were synthesized by melt-spinning technique. The spun alloy ribbons with a continuous length, a thickness of about 30 μm and a width of about 25 mm are obtained. The structures of the as-spun alloy ribbons were characterized by XRD and HRTEM. The electrochemical hydrogen storage characteristics of the as-spun alloy ribbons were measured by an automatic galvanostatic system. The electrochemical impedance spectrums （EIS） were plotted by an electrochemical workstation. The hydrogen diffusion coefficients （D） in the alloys were calculated by virtue of potential-step measurement. The results show that all the as-spun （x=0） alloys hold a typical nanocrystalline structure, whereas the as-spun （x=0.4） alloy displays a nanocrystalline and amorphous structure, confirming that the substitution of Mn for Ni facilitates the glass formation in the Mg2Ni-type alloy. The substitution of Mn for Ni significantly improves the electrochemical hydrogen storage performances of the alloys, involving the discharge capacity and the electrochemical cycle stability. With an increase in the amount of Mn substitution from 0 to 0.4, the discharge capacity of the as-spun （20 m/s） alloy increases from 96.5 to 265.3 mA·h/g, and its capacity retaining rate （S20） at the 20th cycle increases from 31.3% to 70.2%. Furthermore, the high rate dischargeability （HRD）, electrochemical impedance spectrum and potential-step measurements all indicate that the electrochemical kinetics of the alloy electrodes first increases then decreases with raising the amount of Mn substitution.

关键词： Mg2Ni-type alloy electrochemical hydrogen storage melt-spinning substituting Ni with Mn

INFLUENCE OF POLYMER CHARACTERISTICS AND melt-spinning CONDITIONS ON THE PRODUCTION OF HIGH RANDOMNESS 60PHB/PET THERMOTROPIC LIQUID CRYSTAL COPOLYESTER FIBER

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Journal of China Textile University(English Edition) 1994年第2期11卷 27-35页

作者：王华平关桂荷章悦庭 Department of Polymer Materials

Six samples of linear high randomness 60PHB/ PET thermotropic liquid crystal copolyesters are made by melt copolymerization at 290℃ , whose randomness about 0.955 is measured by the discernible ’H-NMR spectrometer. High tenacity, high module fiber is prepared by melt spinning in liquid crystal phase. The effect of molecular weight, shear rate, temperature as well as spinning drawn ratio on the mechanical behavior of 60PHB / PET copolyester fiber are shown that, lower shear rate (2 10 s-1), higher temperature melting （300℃ ）, lower temperature spinning （280℃ ） and higher molecular weight are favourable to the increase of the fiber mechanical properties. With the variance of drawn ratio, fiber mechanical property has a transition point due to traversion from shear-orientation to drawn-orientation. The copolyester fiber has high crystallinity, high orientation at the crystalline region, high chain orientation and high regular fibrillar structure.

关键词： randomness copolyester liquid crystal melt-spinning polyethylene terephalate p-hydroxybenzoic acid orientation.

Hydrogen storage behaviours of nanocrystalline and amorphous Mg_(20)Ni_(10-x)Co_x(x=0-4) alloys prepared by melt spinning

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Transactions of Nonferrous Metals Society of China 2010年第3期20卷 405-411页

作者：张羊换赵栋梁李保卫祁焱郭世海王新林 Department of Functional Material Research Central Iron and Steel Research Institute School of Material Inner Mongolia University o f Science and Technology

The Mg2Ni-type alloys with nominal compositions of Mg20Ni10-xCox(x=0,1,2,3,4,%,mass fraction) were prepared by melt-spinning *** structures of the alloys were studied by XRD,SEM and *** hydrogen absorption/desorption kinetics and the electrochemical performances of the alloys were *** results show that no amorphous phase forms in the as-spun Co-free alloy,but the as-spun alloys containing Co show a certain amount of amorphous *** hydrogen absorption capacities of the as-cast alloys first increase and then decrease with the incremental change of Co *** hydrogen desorption capacities of as-cast and spun alloys rise with increasing Co *** melt spinning significantly improves the hydrogenation and dehydrogenation capacities and kinetics of the *** substitution of Co for Ni clearly enhances the discharge capacities of the alloys and the cycle stability of the as-spun alloys.

关键词： Mg2Ni-type alloy melt-spinning structure hydrogen storage behaviour

Migration of polymer blends during melt-spinning

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Migration of polymer blends during melt-spinning

Structures and electrochemical performances of La_(0.75-x)Zr_xMg_(0.25)Ni_(3.2)Co_(0.2)Al_(0.1) (x=0-0.2) electrode alloys prepared by melt spinning

2006年全国高分子材料科学与工程研讨会

作者： Zhijian Pan, Xu Zhi, Chong Jiang, Meifang Zhu, Chen Yanmo College of Material Science and Engineering, Donghua University, Shanghai Address: 1882, West Yan''an road, Shanghai, China.

＜正＞During melt-spinning, experiment results prove migration of the dispersed phase perpendicular to the flow direction in the matrix fibril-like fiber of LDPE/PA6 and fibrils PA6 transfer to the center of fiber. From the rheology and the hydrodynamics, it is supposed that the viscosity ratio and the high shear force during melt-spinning of polymer blends result in the migration perpendicular to the flow direction.

关键词： migration melt-spinning

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Transactions of Nonferrous Metals Society of China 2010年第4期20卷 607-613页

作者：张羊换赵栋梁师颜春祁焱郭世海王新林 Department of Functional Material Research Central Iron and Steel Research Institute School of Material Inner Mongolia University of Science and Technology

The La-Mg-Ni system A2B7-type electrode alloys with nominal composition La0.75-xZrxMg0.25Ni3.2Co0.2Al0.1(x=0,0.05, 0.1,0.15,0.2)were prepared by casting and *** influences of melt spinning on the electrochemical performances as well as the structures of the alloys were *** results obtained by XRD,SEM and TEM show that the as-cast and spun alloys have a multiphase structure,consisting of two main phases(La,Mg)Ni3 and LaNi5 as well as a residual phase *** melt spinning leads to an obvious increase of the LaNi5 phase and a decrease of the(La,Mg)Ni3 phase in the *** results of the electrochemical measurement indicate that the discharge capacity of the alloys(x≤0.1)first increases and then decreases with the increase of spinning rate,whereas for x>0.1,the discharge capacity of the alloys monotonously *** melt spinning slightly impairs the activation capability of the alloys,but it significantly enhances the cycle stability of the alloys.

关键词： A2B7-type electrode alloy La-Mg-Ni alloy Ni-MH battery melt-spinning electrochemical performance

Influences of melt spinning on electrochemical hydrogen storage performance of nanocrystalline and amorphous Mg_2Ni-type alloys

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Journal of Central South University 2011年第6期18卷 1825-1832页

作者：张羊换李保卫任慧平侯忠辉胡峰王新林 Elected State Key Laboratory Inner Mongolia University of Science and Technology Department of Functional Material Research Central Iron and Steel Research Institute

In order to improve the electrochemical hydrogen storage performance of the Mg2Ni-type electrode alloys, Mg in the alloy was partially substituted by La, and the nanocrystalline and amorphous Mg2Ni-type Mg20-xLaxNi10 （x-=0, 2） alloys were synthesized by melt-spinning technique. The microstructures of the as-spun alloys were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The electrochemical hydrogen storage properties of the experimental alloys were tested. The results show that no amorphous phase is detected in the as-spun Mg20Ni10 alloy, but the as-spun Mg18La2Ni10 alloy holds a major amorphous phase. As La content increases from 0 to 2, the maximum discharge capacity of the as-spun （20 m/s） alloys rises from 96.5 to 387.1 mA.h/g, and the capacity retaining rate （S20） at the 20th cycle grows from 31.3% to 71.7%. melt-spinning engenders an impactful effect on the electrochemical hydrogen storage performances of the alloys. With the increase in the spinning rate from 0 to 30 m/s, the maximum discharge capacity increases from 30.3 to 135.5 mA.h/g for the Mg20Ni10 alloy, and from 197.2 to 406.5 mA-h/g for the Mg18La2Ni10 alloy. The capacity retaining rate （S20） of the Mg2oNi10 alloy at the 20th cycle slightly falls from 36.7% to 27.1%, but it markedly mounts up from 37.3% to 78.3% for the Mg18La2Ni10 alloy.

关键词： Mg2Ni-type hydrogen storage alloy melt-spinning structure electrochemical performance