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Controlled fabrication and electrical-magnetic properties of Poly(OT-co-AN)/Ba_(0.8)La_(0.2)Al_2Fe_(10)O_(19) composites

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Science China(Technological Sciences) 2012年第1期55卷 6-15页

作者： CHEN KeYu xu QingQing LI LiangChao TONG GuoXiu QIAN haisheng XIAO QiuShi xu Feng Department of Chemistry Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004 China

Poly（OT-co-AN）/Ba0.8La0.2Al2Fe10O19 （Poly（OT-co-AN）/BLAF） composites were fabricated by in situ polymerization method. It was investigated that of mass rate of momomer （mor/mAN）, polymeration temperature and time, and feeding ratio of BLAF effect on the structures, morphology, conductivity, magnetic property of composites by the orthogonal optimum design. The results indicated that poly （OT-co-AN） copolymer had a better coating on BLAF particles, and there were some interactions between components in the composites. The magnetic properties of the composites were related to content of the magnetic BLAF particles in it. The feeding ratio of BLAF had a significant influence on constitute and conductivity of the composites, followed by the temperature. The reflection loss and the effective bandwidth of composites for electromagnetic wave were at- tributed to the synergistic effect between poly（OT-co-AN） and BLAF. The poly（OT-co-AN）/BLAF composites with mass ratio of BLAF to mix monomer （moT^mAN =1：1） equal to 5/1 at 10 h in 25~C had a maximum synergistic effect between its compo- nents, showed a maximum reflection loss of -26.94 dB at 14.10 GHz and an available bandwidth of 8.54 GHz. It was sug- gested that the composites can be used as a advancing absorption and shielding materials for electromagnetic wave due to their favorable microwave absorption properties.

关键词： poly(OT-co-AN) copolymer Ba-ferrite conductivity magnetic property reflection loss

A phase-field model for simulating the growth ofαsideplates with branching in titanium alloys

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Journal of Materials Science & Technology 2022年第28期123卷 154-158页

作者： Jinhu Zhang Min Qi haisheng xu Hao Wang Yingjie Ma Dongsheng xu Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Shanghai for Science and Technology Shanghai 200093China

In recent years,titanium and titanium alloys are widely used in the fields of aerospace,oceans,*** to their high strength to weight ratio,good toughness and excellent corrosion resistance[1].Various microstructures and mechanical properties can be ob-tained simply by varying the thermomechanical processing or heat *** an example,the Widmanstätten structure may pos-sess good tensile strength,fracture toughness,fatigue properties and high resistance to crack growth[2].It is formed when tita-nium alloys are cooled from theβphase *** the cooling process,αGB(grain boundaryα)may first nucleates at the priorβgrain boundary,and then theαW(Widmanstättenα)grows fromαGB and forms intragranularαsideplates colony[3].The compli-cated evolution process is difficult to characterize experimentally,since the microstructures observed experimentally are mostly ul-timate results,but not a dynamic evolution process.

关键词： alloys toughness resistance

Design of the beam transport line and injection system of the compact storage ring for TTX

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Design of the beam transport line and injection system of th...

Effects of heating rate on the alloy element partitioning and mechanical properties in equiaxedα+βTi-6Al-4V alloy

第一届中国粒子加速器会议

作者： xu haisheng HUANG WenHui Accelerator Laboratory Department of Engineering PhysicsTsinghua University Key Laboratory of Particle and Radiation Imaging of Ministry of Education Tsinghua University Key Laboratory of High Energy Radiation Imaging Fundamental Science for National Defense

In this article,we present the design of the beam transport line and injection system of the compact storage ring for the Tsinghua Thomson scattering X-ray(TTX) *** layout of the beam transport line fits in with the limited available *** injection system is simplified,consisting of only one single kicker;the stray field on the reference orbit is also reduced without the septum *** choose a travelling wave kicker and present both 2D and 3D simulations for the structure design.

关键词： beam transport line injection system compton scattering X-ray source kicker

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Journal of Materials Science & Technology 2021年第35期94卷 1-9页

作者： Jinhu Zhang Hongtao Ju haisheng xu Liang Yang Zhichao Meng Chen Liu Ping Sun Jianke Qiu Chunguang Bai Dongsheng xu Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Safety Evaluation Center Shenyang Research Institute of Chemical Industry Co.Ltd.Shenyang 110141China

The effects of heating rate on the alloy element partitioning and mechanical properties during the phase transformation ofα→βin Ti-6Al-4 V alloy under solution treatment have been investigated by the experiments and phase field simulations,which reveal the evolutions of microstructure and compositions at the non-equilibrium state and well verify the experimental *** specific results indicate that the compositions measured through electron probe micro-analysis(EPMA)under a lower heating rate are close to the equilibrium ones corresponding to the solution *** up to the target solution temperature,as the heating rate increases,the Al content decreases and V increases in the primaryα(α_(p))grain with a larger size,the volume fraction ofα_(p)increases and the composition gradient betweenα_(p)andβphases gets *** interrelated relationship among the diffusion,compositions,solution temperature and free energy of the system has been discussed in ***,increasing the heating rate(~20.0 K/min)may help to improve the mechanical properties of the alloy by mainly adjusting theα_(p)/β;volume fractions,α_(p)particle size and secondaryα(α_(p))size during the process of heating up to the solution *** results may shed some light on the optimization of the knowledge-based heat treatment route.

关键词： Heating rate Alloying element partitioning Microstructure morphology Mechanical properties

Phase field simulation of the stress-inducedαmicrostructure in Ti–6Al–4 V alloy and its CPFEM properties evaluation

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Journal of Materials Science & Technology 2021年第31期90卷 168-182页

作者： Jinhu Zhang xuexiong Li Dongsheng xu Chunyu Teng Hao Wang Liang Yang Hongtao Ju haisheng xu Zhichao Meng Yingjie Ma Yunzhi Wang Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China China Aero-Polytechnology Establishment Beijing 100028China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Materials Science and Engineering The Ohio State University2041 Collesnited States

Variant selection under specific applied stresses during precipitation of a plates from prior-βmatrix in Ti-6 Al-4 V was investigated by 3 D phase field *** model incorporates the Burgers transformation path fromβto a phase,with consideration of interfacial energy anisotropy,externally applied stresses and elastic interactions among a variants andβ*** Gibbs free energy and atomic mobility data are taken from available thermodynamic and kinetic *** was found that external stresses have a profound influence on variant selection,and the selection has a sensitive dependence,as evidenced by both interaction energy calculations and phase field *** with normal stresses,shear stresses applied in certain directions were found more effective in accelerating the transformation,with a stronger preference to fewer *** volume fractions of various a variants and the final microstructure were determined by both the external stress and the elastic interaction among different *** a clusters formed by variants with Type2 misorientation([11-20]/60°)relation were found more favored than those with Type4([-1055-3]/63.26°)under certain applied tensile stress such as alongβ.The mechanical properties of different microstructures from our phase field simulation under different conditions were calculated for different loading conditions,utilizing crystal plastic finite element *** mechanical behavior of the various microstructures from phase field simulation can be evaluated well before the alloys are fabricated,and therefore it is possible to select microstructure for optimizing the mechanical properties of the alloy through thermomechanical processing based on the two types of simulations.

关键词： Titanium alloy Phase transformation Microtexture Mechanical evaluation Phase field Crystal plasticity finite element

Design of the HEPS booster lattice

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Radiation Detection Technology and Methods 2020年第4期4卷 425-432页

作者： Yuemei Peng Zhe Duan Yuanyuan Guo Yi Jiao Jingyi Li Cai Meng Gang xu haisheng xu Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina

Purpose The high energy photon source(HEPS)is a diffraction-limited storage ring light source being built in *** with the deeper studies of booster and the evolution of the lattice design and injection scheme of the storage ring,four versions of the booster lattices have been proposed from the project proposal *** Unlike the design of the storage ring,in the booster design,more effort was made to realize stable and reliable operation rather than advanced performance.A FODO structure lattice and the"high-energy accumulation"scheme was adopted in the HEPS booster *** find the ultimate performance of the lattice,a multi-objective genetic algorithm(MOGA)and particle swarm optimization(PSO)were used to optimize the emittance and the dynamic *** In the latest booster lattice design,the emittance was reduced to 16.3 nm *** the same time,the single-bunch charge limit was increased by minimizing the average vertical beta function and reducing the *** Through multi iterations with the hardware system,the current lattice was basically frozen and can be used as a basis for related physics studies,hardware and engineering design of the *** the future,more detailed physical studies will be performed based on this lattice.

关键词： Lattice design Emittance Booster

Surface Structure and High-frequency Magnetic Properties of the Amorphous [Co_(0.94-x)Fe_(0.06)(MoMn)_x]_(77)(SiB)_(23) Alloys

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Journal of Materials Science & Technology 1993年第1期9卷 20-24页

作者： Lijun CHEN Yuzhi LIU Gingzhen xu haisheng SHI Shanghai Iron and Steel Research Institute,Shanghai,200940,China

The relationship between the high-frequency magnetic properties and surface structure of the amorphous [Co_(0.94-x)Fe_(0.06)(MnMo)_x]_(77)(SiB)_(23) alloys annealed at 400-500℃ then control-cooled was investigated using XRD,TEM and XPS *** results have shown that the high-frequency losses of the present alloys ob- viously reduced after suitable treatment.A crystalline layer with ultrafine grains of γ-Co formed on the surface of the amorphous *** size of the grains is 10-20 *** thickness of the layer is less than 0.1 μ*** sur- face of the crystalline layer is covered with an extremely thin oxide film which is very uniform and dense with thickness of less than 30 nm,the size of grains of the oxide is less than 10 *** ultrafine grains and the dense oxide film effectively refine the magnetic domains and increase the resistance of the layers of the magnetic core,consequently the losses at high frequency are fairly reduced.

关键词： magnetic property amorphous alloy surface structure

非晶态Ni-Cu-Ce-B催化剂的表征及其苯酚加氢表面作用机理

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石油学报（石油加工） 2018年第1期34卷 161-166页

作者：徐海升王博王豪西安石油大学化学化工学院陕西西安710065

以NiCl2、Cu(NO3)2、Ce(NO3)3为原料,KBH4为还原剂,采用浸渍法和化学还原法制备了负载型和非负载型Ni-Cu-Ce-B非晶态催化剂,通过差示扫描量热仪(DSC)、物理吸附仪(BET法)、扫描电子显微镜(SEM)和X射线衍射仪(XRD)等手段对催化剂进行了... 详细信息

以NiCl2、Cu(NO3)2、Ce(NO3)3为原料,KBH4为还原剂,采用浸渍法和化学还原法制备了负载型和非负载型Ni-Cu-Ce-B非晶态催化剂,通过差示扫描量热仪(DSC)、物理吸附仪(BET法)、扫描电子显微镜(SEM)和X射线衍射仪(XRD)等手段对催化剂进行了表征。以苯酚加氢制备环己酮为反应体系,考察了助剂Cu、Ce对Ni-B/γ-Al2O3催化剂活性和选择性的影响及其表面作用机理。结果表明,加入Cu、Ce的Ni-B合金晶化温度有所提高,热稳定性加强,将其负载于γ-Al2O3后催化剂的比表面积大大增加,活性组分分散均匀。Cu与Ni之间的电子转移和Ce对于催化剂碱性的提高有利于增加环己酮选择性。

关键词：非晶态催化剂表征苯酚环己酮作用机理

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多硫醚混合硫化剂的组成分析及热分解行为

石油学报（石油加工） 2015年第3期31卷 740-744页

作者：徐海升许世业周安宁西安石油大学化学化工学院陕西西安710065 西安科技大学化学与化工学院陕西西安710054

以溴乙烷、硫磺和硫化钠为原料,在相转移催化剂存在下合成多硫醚混合硫化剂。对产物进行了组成分析、热分解行为研究和机理探讨。结果表明,合成产物主要为目标化合物二乙基二硫醚、二乙基三硫醚和二乙基四硫醚,三者含量占总质量分数的97... 详细信息

以溴乙烷、硫磺和硫化钠为原料,在相转移催化剂存在下合成多硫醚混合硫化剂。对产物进行了组成分析、热分解行为研究和机理探讨。结果表明,合成产物主要为目标化合物二乙基二硫醚、二乙基三硫醚和二乙基四硫醚,三者含量占总质量分数的97.8%,反应单程收率85.3%,产物硫质量分数达63.86%,且具有较宽的分解温度范围（50~235℃）和较大的吸热效应,无需分离即可直接应用于加氢催化剂的预硫化处理,应用前景广阔。

关键词：多硫醚合成组成分析热分解混合硫化剂