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石墨烯复合材料设计对其电催化性能影响的研究进展

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石油学报（石油加工） 2024年第2期40卷 447-452页

作者：徐海升薛媚月李善建丁丽芹范峥西安石油大学化学化工学院陕西西安710065 陕西省绿色低碳能源材料与过程工程技术研究中心陕西西安710065 西安市高碳资源低碳化利用重点实验室陕西西安710065

石墨烯是以sp2杂化轨道组成的六角型蜂巢状二维碳纳米材料,具有比表面积大、导电性好和机械强度高等优点,在电催化领域被广泛应用,但也存在易堆叠、活性位点少等不足。石墨烯材料电催化活性与其原子排列、分子吸附和活化、电子结构、电... 详细信息

石墨烯是以sp2杂化轨道组成的六角型蜂巢状二维碳纳米材料,具有比表面积大、导电性好和机械强度高等优点,在电催化领域被广泛应用,但也存在易堆叠、活性位点少等不足。石墨烯材料电催化活性与其原子排列、分子吸附和活化、电子结构、电荷运输等相关,综述了通过掺杂调控提高其内在活性、界面调控实现不同组分之间的协同作用、相调控改变原子排布方式、结构调控改变局部环境促进电子和质量传递等改善石墨烯材料电催化性能的方法,指出将掺杂调控与其他3种活性调控方法有机结合是未来的发展方向。

关键词：石墨烯电催化活性掺杂调控界面调控相调控结构调控

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

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 193-196页

作者： xu haisheng HUANG WenHui Accelerator Laboratory Department of Engineering PhysicsTsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging of Ministry of Education Tsinghua UniversityBeijing 100084China Key Laboratory of High Energy Radiation Imaging Fundamental Science for National Defense Beijing 100084China

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) source. The layout of the beam transport line fits in with the limited available space. The injection system is simplified, consisting of only one single kicker; the stray field on the reference orbit is also reduced without the septum magnet. We 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

激光增材制造铜铬锆合金研究进展:成形行为、微观组织和综合性能(特邀)

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中国激光 2024年第4期51卷 141-159页

作者：陈兴宇李昊陈乔雨徐海升谢凡轩李正黄田野关凯尹作为郝亮殷杰中国地质大学(武汉)珠宝学院湖北武汉430074 中国地质大学(武汉)先进制造研究所湖北武汉430074 湖北三江航天江北机械工程有限公司湖北孝感432000 中国地质大学(武汉)机械与电子信息学院湖北武汉430074 鑫精合激光科技有限公司北京102200

铜铬锆(CuCrZr)作为沉淀硬化合金,以其良好的耐热性、耐腐蚀性以及优异的力学、电学和热学性能而被广泛应用于航空航天、核能化工等领域。然而,CuCrZr是当前激光增材制造(LAM)难成形材料之一,相关研究报道还很有限。本文综述了近年来激... 详细信息

铜铬锆(CuCrZr)作为沉淀硬化合金,以其良好的耐热性、耐腐蚀性以及优异的力学、电学和热学性能而被广泛应用于航空航天、核能化工等领域。然而,CuCrZr是当前激光增材制造(LAM)难成形材料之一,相关研究报道还很有限。本文综述了近年来激光粉末床熔融(L-PBF)制备CuCrZr合金的研究进展,重点探究了绿激光与近红外激光对成形质量的影响规律,分析了热处理及构建方向与微观组织、力学性能的内在联系,并研究了热处理对于电学、热学性能的强化机制。近红外激光制备样品的致密度波动范围大(95.5%~99.9%),绿激光制备样品的整体致密度较低但波动范围较小(96.5%~98.5%),工艺参数仍有优化空间。合金的微观组织和综合性能都存在各向异性,即沿水平方向的晶粒细小,沿垂直方向的晶粒为柱状晶粒。固溶处理会使合金的熔池边界消失并改变晶粒形态,时效处理导致合金产生沉淀并改变晶粒取向。500℃左右处理1~2 h的直接时效处理对力学性能的提升最大,时效处理通过降低位错密度、减少热残余应力和促进沉淀物的形成,显著增强了合金的力学性能。对电学、热学性能提升最大的热处理条件为950~1000℃的固溶退火处理1 h+500℃左右的时效硬化处理1~3 h,这是因为固溶退火+时效硬化处理降低了位错密度和残余应力,并产生了有益的沉淀物。本文总结了L-PBF制备CuCrZr合金的成形行为、微观组织和综合性能的研究进展,并对其研究前景和发展方向进行了展望。

关键词：激光增材制造铜铬锆合金成形行为微观组织综合性能

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

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

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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

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...

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

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

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生物饲料在动物养殖中的应用研究进展

畜牧与饲料科学 2024年第3期45卷 20-26页

作者：刘向敏徐海生卢媛王晓东赵称赫内蒙古自治区农牧业科学院内蒙古呼和浩特010031 赤峰市农牧业综合行政执法支队内蒙古赤峰024050 内蒙古自治区农畜产品质量安全中心内蒙古呼和浩特010010 内蒙古自治区生态环境厅内蒙古呼和浩特010011 内蒙古正大食品有限公司内蒙古呼和浩特010090

在畜禽饲料端“禁抗”的背景下,生物饲料作为抗生素替代产品备受关注。生物饲料具有改善饲料品质以及提高动物生产性能、提升动物免疫力、调节动物肠道菌群等功能,市场接受度日益提高。介绍了生物饲料的定义和分类,以发酵饲料和菌酶协... 详细信息

在畜禽饲料端“禁抗”的背景下,生物饲料作为抗生素替代产品备受关注。生物饲料具有改善饲料品质以及提高动物生产性能、提升动物免疫力、调节动物肠道菌群等功能,市场接受度日益提高。介绍了生物饲料的定义和分类,以发酵饲料和菌酶协同发酵饲料为例,综述生物饲料在牛、羊、猪生产中的应用研究进展,分析当前生物饲料应用存在的问题并提出相关建议,以期为生物饲料的开发及应用提供参考。

关键词：生物饲料抗生素动物养殖发酵饲料菌酶协同