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A Method of Obtaining Deformation Information by Tracing Deformation from Sections for 3D fe Simulation

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Journal of Materials Science & Technology 2003年第Z1期19卷 65-68页

作者： Mei ZHAN He YANG Yuli LIU College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China College of Materials Science and Engineering Northwestern Polytechnical University Xi′an 710072 China

With the development of computer technology and finite element method, the priority research area of plasticforming has focused on 3D fe simulation of forming processes for components with complicated geometrical *** processes have complex deforming mechanism, and different sections have different deforming ***, for making a simple, convenient, and practical analysis of its deforming law, how to obtain deformationinformation of key sections from the results of 3D fe simulation has become one of problems urgently to be ***, a method of obtaining deformation information by tracing deformation from sections for 3D fe simulation hasbeen proposed. From the deformation information got by this method, the deformation law of key locations and thewhole deforming body can be obtained. This method can also help to compare the result from fe simulation withthat from physical modeling. Key procedures of this method have been presented in detail, and it has been testedby applying to 3D fe simulation of precision forging of the blade with a damper platform. The result shows thatthe method is practicable and reliable, and it can also be applied to 3D fe simulation of plastic forming processes ofother components.

关键词： Plastic forming, 3D fe simulation, Deformation information

Fabrication and Characterization of fe-Doped In2O3 Dilute Magnetic Semiconducting Nanowires

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Chinese Physics Letters 2015年第3期32卷 133-136页

作者：张军然吴振尧刘玉杰吕占朋钮伟王学锋杜军刘文卿张荣徐永兵 Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and Engineering Nanjing University Nanjing 210093 National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures Department of Physics Nanjing University Nanjing 210093 York-Nanjing International Center of Spintronics (YNICS) Department of Electronics The University of York Y010 3DD United Kingdom

fe-doped In2O3 dilute magnetic semiconducting nanowires are fabricated on A u-deposited Si substrates by the chemical vapor deposition technique. It is confirmed by energy dispersive x-ray spectroscopy （EDS）, x-ray photoelectron spectroscopy （XPS） and Raman spectroscopy that fe has been successfully doped into lattices of In2O3 nanowires. The EDS measurements reveal a large amount of oxygen vacancies existing in the fe-doped In2O3 nanowires. The fe dopant exists as a mixture of fe2＋ and fe3＋, as revealed by the XPS. The origin of room-temperature ferromagnetism in fe-doped In2O3 nanowires is explained by the bound magnetic polaron model.

关键词： fe In Fabrication and Characterization of fe-Doped In2O3 Dilute Magnetic Semiconducting Nanowires

Optical and structural properties of highly porous shell structured fe doped TiO_2 thin films

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Rare Metals 2014年第5期33卷 578-582页

作者： C.S.Naveen P.Raghu H.M.Mahesh K.Narasimha Rao R.Rakesh Kumar A.R.Phani Department of Electronic Science Bangalore UniversityJnanabharathi Department of Instrumentation and Applied Physics Indian Institute of Science Nano-Research for Advanced Materials and Technologies (Nano-RAM Technologies)

TiO2thin films with 0.2 wt%, 0.4 wt%, 0.6wt%, and 0.8 wt% fe were prepared on glass and silicon substrates using sol–gel spin coating technique. The optical cut-off points are increasingly red-shifted and the absorption edge is shifted over the higher wavelength region with fe content increasing. As fe content increases, the optical band gap decreases from 3.03 to 2.48 eV whereas the tail width increases from 0.26 to 1.43 eV. The X-ray diffraction（XRD） patterns for doped films at 0.2 wt% and0.8 wt% fe reveal no characteristic peaks, indicating that the film is amorphous whereas undoped TiO2exhibits（101） orientation with anatase phase. Thin films of higher fe content exhibit a homogeneous, uniform, and nanostructured highly porous shell morphology.

关键词： fe TiO2 Porous shell Sol–gel

Detection of DNA Bases Using fe Atoms and Graphene

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Chinese Physics Letters 2016年第1期33卷 123-126页

作者：胡建芬冯琳张文星李勇卢亚鑫 Key Laboratory of Advanced Transducers and Intelligent Control System(Ministry of Education) Department of PhysicsTaiyuan University of Technology

The adsorption of DNA bases on a magnetic probe composed of fe atoms and graphene is studied by using first- principles calculations. The stability of geometry, the electronic structure and magnetic property are investigated. The results indicate that four DNA bases, i.e., adenine, thymine, cytosine and guanine, can all be adsorbed on the probe solidly. However, the magnetic moments of the composite structure can be observed only when adenine adsorbs on the probe. In the cases of the adsorption of the other three bases, the magnetic moments of the composite structure are zero. Based on the significant change of magnetic moment of the composite structure, adenine can be distinguished conveniently from thymine, cytosine and guanine. This work may provide a new way to detect DNA bases.

关键词： of on as in fe Detection of DNA Bases Using fe Atoms and Graphene that DNA is

Effects of fe-Oxide and Mg Layer Insertion on Tunneling Magnetoresistance Properties of CofeB/MgO/CofeB Magnetic Tunnel Junctions

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Chinese Physics Letters 2016年第11期33卷 124-126页

作者：娄永乐张玉明郭辉徐大庆张义门 School of Microelectronics Xidian University School of Electrical and Control Engineering Xi'an University of Science and Technology

To study the influence of CofeB/MgO interface on tunneling magnetoresistance （TMR）, different structures of magnetic tunnel junctions （MTJs） are successfully prepared by the magnetron sputtering technique and characterized by atomic force microscopy, a physical property measurement system, x-ray photoelectron spectroscopy, and transmission electron microscopy. The experimental results show that TMR of the CofeB/Mg/MgO/CofeB structure is evidently improved in comparison with the CofeB/MgO/CofeB structure because the inserted Mg layer prevents fe-oxide formation at the CofeB/MgO interface, which occurs in CofeB/MgO/CofeB MTJs. The inherent properties of the CofeB/MgO/CofeB, CofeB/fe-oxide/MgO/CofeB and CofeB/Mg/MgO/CofeB MTJs are simulated by using the theories of density functions and non-equilibrium Green functions. The simulated results demonstrate that TMR of CofeB/fe-oxide/MgO/CofeB MTJs is severely decreased and is only half the value of the CofeB/Mg/MgO/CofeB MTJs. Based on the experimental results and theoretical analysis, it is believed that in CofeB/MgO/CofeB MTJs, the interface oxidation of the CofeB layer is the main reason to cause a remarkable reduction of TMR, and the inserted Mg layer may play an important role in protecting fe atoms from oxidation, and then increasing TMR.

关键词： MgO of TMR fe Effects of fe-Oxide and Mg Layer Insertion on Tunneling Magnetoresistance Properties of CofeB/MgO/CofeB Magnetic Tunnel Junctions in is that on

Positron Annihilation Study on the Microstructural Stability in Rapidly Solidified Al_(92.3)fe_(4.3)V_(0.7)Si_(1.7)Mm_(1.0) Alloy

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Journal of Materials Science & Technology 1998年第2期14卷 179-181页

作者： Wei JIA Meikuang Tseng and Jianqiang WANG(Dept. of Material Science, Northeastern University Shenyang 110006, China)Liangyue XIONG and Yelong CHU(International Ceoter for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences,Shenyan Dept. of Material Science Northeastern University Shenyang 110006 China International Center for Materials Physics Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

Rapidly solidified Al92.3fe4.3V0.7Si1.7Mm1.0 alloy has been studied by positron lifetime spectroscopy and the variations on the intedecial defects with the annealing temperature were revealed by an analysis of the lifetime results. The intedece characteristics derived from the positron-lifetime results could be used to give a satisfactory interpretation of the dependence of mechanical properties on the annealing temperature

关键词： fe Positron Annihilation Study on the Microstructural Stability in Rapidly Solidified Al Mm Si

fe salts as catalyst for the wet oxidation of o-chlorophenol

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第6期6卷 569-573页

作者：徐新华何平金剑郝志伟 Department of Environmental Engineering Zhejiang University Hangzhou 310027 China

Catalytic wet air oxidation (CWAO) of o-chlorophenol in wastewater was studied in a stainless steel autoclave using four different fe catalysts in the temperature range of 100?200 °C. Experimental results showed that high rate of o-chlorophenol and CODCr (Chemical Oxygen Demand, mg/L) removal by CWAO was obtained at relatively low temperature and pressure. The catalysts fe2(SO4)3, feSO4, fe2O3 and feCl3 all exhibited high catalytic activity. More than 93.7% of the initial CODCr and nearly 100% of o-chlorophenol were removed at 150 °C after 150 min with feSO4 as catalyst. The CWAO of o-chlorophenol was found to be pseudo-first order reaction with respect to o-chlorophenol, with activation energy of 75.56 kJ/mol in the temperature range of 100-175 °C.

关键词： fe o-chlorophenol Catalytic wet air oxidation Kinetic

Studies of the roles of Sn or fe on γ-Al_2O_3-supported Pt catalysts by CO adsorption microcalorimetry and dehydrogenation reaction of C_4 alkanes

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Science China Chemistry 1998年第6期41卷 606-615页

作者：贾继飞林励吾沈俭一徐竹生张涛梁东白陈懿 State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Department of Chemistry Nanjing University Nanjing China

CO adsorption microcalorimetry was employed in the study of γ-Al-2O-3-supported Pt, Pt-Sn and Pt-fe catalysts. The results indicated that the initial differential heat of CO adsorption of the Pt/γ-Al-2O-3 catalyst was 125 kJ/mol. As CO coverage increased, the differential heat of adsorption decreased. At higher coverages, the differential heat of adsorption decreased significantly. 60% of the differential heat of CO adsorption on the Pt/γ-Al-2O-3 catalyst was higher than 100 kJ/mol. No significant effect on the initial differential heat was found after adding Sn and fe to the Pt/γ-Al-2O-3 catalyst. The amount of strong CO adsorption sites decreased, while the portion of CO adsorption sites with differential heat of 60110 kJ/mol increased after increasing the Sn or fe content. This indicates that the surface adsorption energy was changed by adding Sn or fe to Pt/γ-Al-2O-3. The distribution of differential heat of CO adsorption on the Pt-Sn（C）/γ-Al-2O-3 catalyst was broad and homogeneous. Comparison of the dehydrogenation performance of C-4 alkanes with the number of CO adsorption sites with differential heat of 60110 kJ/mol showed a good correlation. These results indicate that the surface Pt centers with differential heats of 60110 kJ/mol for CO adsorption possess superior activity for the dehydrogenation of alkanes.

关键词： CO γ-Al-2O-3 Pt Sn fe differential heat dehydrogenation of C-4 alkanes.

Electron Microscopy Analysis of Deformation Induced ε Martensite Transformation in an fe-Mn-Si-Cr-Ni Alloy

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Journal of Materials Science & Technology 1994年第4期10卷 263-268页

作者： Fuxing YIN Jianxin ZHANG Ruixiang WANG and Nanju GU (Hebei Institute of Technology, Tianjin, 300132, China)(To whom correspondence should be addressed)Kenichi Shimizu (Kanazawa Institute of Technology, Ishikawa, Japan) Hebei Inst of Technology Tianjin China

The configurations of stacking faults and morphologies of strain induced ε martensite plates in an feMnSiCrNi alloy were investigated through electron microscopy analysis. The Shockley partial dislocation structures. sensitive to external stress. determine the configurations of stacking faults in γphase Partial dislocations at the front sides of stacking faults are usetul for the nucleation of εmartensite plates. The growth of ε martensite plates is accompanied with the disappearance of local pre-existing stacking faults, The ε martensite vanants behave in three morphologies of respective stopping. continuous penetrating and intersections with the formation of secondary ε martensite plates

关键词： Mn Electron Microscopy Analysis of Deformation Induced Martensite Transformation in an fe-Mn-Si-Cr-Ni Alloy fe Si Cr Ni