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Periodic Layered Structure Formed during Interfacial Reaction

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Journal of Iron and Steel Research International 2016年第11期23卷 1127-1133页

作者： Xian-man ZHANG Hong-feng LUO liu-yong shi Institute of Electrical and Mechanical Engineering Hainan University

A review of the periodic layered structure （PLS） formed during reactive diffusion was presented. The formation of PLS is a very interesting and complex phenomenon during the reactive diffusion process. It was firstly discovered occasionally. The formation of PLS has been reported in various solid state diffusion couples such as Zn/ Ni3 Si, Mg/SiO2, Zn/Cux Tiy and so on, and some controversial theoretical models and formation mechanism of PLS were put forward. However, there have been few reports about the PLS formed during hot dip. The development of PLS was reviewed, and the recent progress referring to the formation of PLS during the hot dip aluminizing of a no- vel Fe-Cr-B cast steel was especially introduced. However, not all of the borides could form PLS in their interracial reaction with molten Al. PLS only formed at the Cr-rich Fe2B/Al interface, while Mo-rich Fe2B fractured. A general qualitative description for the interracial reaction of Fe-Cr-B cast steel with molten Al was represented. Further inves- tigation on the constituents of the alternating phases and formation mechanism of PLS needs to be done. At last, the development trends of PLS were proposed.

关键词： periodic layered structure interfacial reaction reactive diffusion formation mechanism Fe-Cr-B cast steel

Growth kinetics of cubic carbide free layers in graded cemented carbides

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International Journal of Minerals,Metallurgy and Materials 2012年第1期19卷 64-71页

作者： liu-yong shi Yi-min liu Ji-hua Huang Shou-quan Zhang Xing-ke Zhao School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China College of Mechanical and Electrical engineering Hainen University Danzhou 571737 China Xiarnen Golden Egret Special Alloy Co. Ltd. Xiamen 361006 China

In order to reveal the formation mechanism of cubic carbide free layers （CCFL）, graded cemented carbides with CCFL in the surface zone were fabricated by a one-step sintering procedure in vacuum, and the analysis on microstructure and element distribution were performed by scanning electron microscopy （SEM） and electron probe micro-analyzer （EPMA）, respectively. A new physical model and ki- netic equation were established based on experimental results. Being different f^om previous models, this model suggests that nitrogen diffu- sion outward is only considered as an induction factor, and the diffusion of titanium through liquid phase plays a dominative role. The driving force of diffusion is expressed as the differential value between nitrogen partial pressure and nitrogen equilibrium pressure essentially. Simulation results by the kinetic equation are in good agreement with experimental values, and the effect of process parameters on the growth kinetics of CCFL can also be explained reasonably by the current model.

关键词： graded materials cemented carbides diffusion kinetics

Exact Quantum Logic Gates with a Single Trapped Cold Ion

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Chinese Physics Letters 2001年第11期18卷 1533-1535页

作者： WEI Lian-Fu liu shi-yong LEI Xiao-Lin Department of Physics Shanghai Jiaotong UniversityShanghai 200030

We present an alternative scheme to exactly implement one-qubit and two-qubit quantum gates with a single trapped cold ion driven by a travelling laser field. The internal degree of freedom of the ion acts as the target qubit and the control qubit is encoded by two Fock states of the external vibration of the ion. The conditions to realize these operations, including the duration of each applied laser pulse and Lamb-Dicke parameter, are derived. In our scheme neither the auxiliary atomic level nor the Lamb-Dicke approximation is required. The multiquantum transition between the internal and external degrees of freedom of the ion is considered.

关键词： field Dicke quantum

Enhanced Brightness and Efficiency in Organic Light-Emitting Devices Using an LiF-Doped Electron-injecting Layer with Aluminium Cathode

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Chinese Physics Letters 2001年第1期18卷 120-122页

作者： LI Chuan-Nan XIAO Bu-Wen liu shi-yong Department of Electronics Engineering&National Laboratory of Integrated Optoelectronics Jilin UniversityChangchun 130023

Organic light-emitting devices(OLEDs)with enhanced brightness and efficiency were developed using an LiF-doped organic layer as an electron-injecting layer besides the aluminium *** typical device structure is glass substrate/indium-tin-oxide/N,N'-bis(3-methyphenyl)-N,N'-diphenylbenzidize/8-tris-hydroxyquinoline aluminium(Alq3)/LiF-doped Alq3/*** optimized device with an LiF-doped Alq3 layer showed brightness over 15300 cd/m^(2),while the device without the LiF-doped Alq3 layer exhibited only 3200 cd/m^(2),also,the luminance efficiency of the former was 4-5 times as that of the *** is another way to improve the OLEDs performance,especially in applications of OLEDs with a large active area.

关键词： Alq3 OLEDs Efficiency

Folded or nonfolded fluorophores incorporating naphthalene:Their fluorescent quenching driven by charge transfer or co-aggregation in the aqueous-organic binary solvent

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Chinese Chemical Letters 2010年第2期21卷 221-224页

作者： Zhou, Qi Zhong liu, shi yong Zhao, Shu Min Jiang, Huang Jiang Taizhou Univ Dept Chem Taizhou 317000 Peoples R China Zhejiang Univ Dept Chem Hangzhou 310027 Peoples R China

Folded or nonfolded fluorophores incorporating naphthalene were synthesized and characterized by steady state fluorescence *** as an excellent quenching reagent quenched the fluorescence of Nel6 or nDs(n = 1-4) driven by charge *** aggregation of nDs,α-CD did not quench the fluorescence of *** lower concentration,the quenching tendency ofα-CD against nDs is 2D>3D>4D,while at higher concentration,the tendency is 2D<3D<4D.α-CD showed the selective recognition on its flu...

关键词： Fluorophore Fluorescent quenching Charge transfer Co-aggregation Selective recognition

Orthogonal Alignment InAs Islands Formation on GaAs Tensile Strained Layer Grown on (001) InP Substrate by Low Pressure Metal-Organic Chemical Vapor Deposition

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Chinese Physics Letters 1998年第11期15卷 843-845页

作者： GAO Chun-xiao WANG Ben-zhong liu Bing-bing liu shi-yong ZOU Guang-tian State Key Laboratory for Superhard Materials Jilin UniversityChangchun 130023 State Key Laboratory on Integrated Optoelectronics Jilin University RegionChangchun 130023

Nucleation control is one of the key questions in quantum dots preparation and *** paper reports the experimental results of orthogonal alignment InAs islands formed on(001)InP substrate by low-pressure metal-organic chemical vapor *** a nucleation control layer,the tensile strained GaAs epilayer with orthogonal trench structure was grown firstly on(001)InP substrate under Stranski-Krastanov growth ***,the InAs islands were grown selectively on the trench edges by using strain *** growth technique results in the formation of orthogonal alignment InAs islands without any preprocessing technique prior to the growth.

关键词： trench InP alignment

Study of Composite Hardcoat Anodizing of Aluminum Alloy 6063 and Its Friction Behaviors

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材料热处理学报 2004年第05B期25卷 1146-1148页

作者： liushi-yong ZHANGHui-chen GAOXue-min liuWei shiYa-qin InstituteofMetafandTechnology DalianMaritimeUniversity Datian116026 China

A composite hard-anodized coating containing micro PTFE (polytetrafluoroethylene) particles on aluminum alloy 6063 was produced by adding micro PTFE particles into the traditional hardcoat anodizing solution. The size of the PTFE particles is around 2 v- m in diameter and the content of the PTFE particles in the composite coating is within 2%-3% by area percentage. Thickness of the composite coating can reach up to 70 v m after one hour’s anodizing. Surface hardness of the composite coating is between 400-480 HVo.i- The average friction coefficient of the composite coating against steel under dry friction test is 0.11, which is 17% lower than that obtained by traditional hardcoat anodizing.

关键词： 6063铝合金硬盖阳极氧化复合涂层 PTEE 摩擦系数

Flexible Blue Light Emitting Diodes Made from Dye Doped Poly (N-Vinylcarbazole) with Multilayer Structure

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Chinese Physics Letters 1997年第1期14卷 74-76页

作者： CHEN Bai-jun HOU Jing-ying HUANG Jing-song liu shi-yong State Key Laboratory on Integrated Optoelectronics Jilin UniversityChangchun 130023

Flexible blue light emitting diodes(LEDs)were fabricated by using poly(N-vinylcarbazole)(PVK)doped with high fluorescence dye,1,1,4,4-tetraphen1-1,3-butadiene(TPB),as a emitter layer,a layer of tris(8-quinolino1ato)aluminum(Ⅲ)(Alq3)as an electron-transporting layer,and a layer of 2-(4-biphenylyl)-5-(4-tertbutypheny)-1-3,4-oxadiazole(PBD)as hole-blocking layer;a cell structure of flexible substrate/indium-tin-oxide/PVK:TPB/PBD/Alq3/Al was *** this cell structure,carrier injection from the electrodes to the doped PVK layer and concomitant electroluminescence from doped PVK were observed at room temperature with dcbias voltage of *** emission peaks at about *** kind of LED is about 200μm thick and can be curled or bent repeatedly at sharp angles without failure.

关键词： emitter layer repeatedly

Photoluminescence and Electroluminescence from Plasma Ploymerized Naphthalene Films

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Chinese Physics Letters 1996年第10期13卷 794-796页

作者： ZHANG Hai-feng MA Yu-guang TIAN Wen-jing SHEN Jia-cong TANG Jian-guo liu shi-yong Key Laboratory of Molecular Spectra and Structures Jilin UniversityChangchun 130023 National Labaratory of Integrated Optical Electronics Jilin UniversityChangchun 130023

A polymer thin film electroluminescence (EL) device has been prepared by using plasma polymerization technique. Its basic structure consists of an emitting layer of plasma polymerized naphthalene (PPN) which is sandwiched between two metal electrodes. A uniform blue emission is observed under 8-20 V. Some electrical and optical properties of the device are described. The possible explanations for the blue EL from PPN are discussed.

关键词： technique. sandwich polymerization