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PREPARATION AND CORROSION RESISTANCE OF NiP/TiO_2 COMPOSITE FILM ON CARBON STEEL IN SULFURIC ACID SOLUTION

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Acta Metallurgica Sinica(English Letters) 2006年第2期19卷 117-123页

作者： L.Z. Song S.Z. Song j. zhao School of Environment ＆ Chemical Engineering Yanshan University Qinhuangdao 066004 China School of Materials Science and Engineering Tianjin University Tianjin 300072 China

A NiP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimize the prepared condition of the composite film. Corrosion behavior of the NiP/TiO2 composite film was investigated by polarization resistance measurement, anode polarization, ESEM （environmental scanning electron microscopy） and EIS （electrochemical impedance spectroscopy） measurements. Results showed that the NiP/ TiO2 composite film has a good corrosion resistance in 0.5mol/L H2SO4 solution. The element valence of the composite film was characterized by XPS （X-ray photoelectron spectroscopy） spectrum, and an anticorrosion mechanism of the composite film was discussed.

关键词： electroless plating and sol-gel composite process artificial neural network NiP/TiO2 composite film corrosion resistance

Analyses of plasma reactive sputter deposition of CN_x films by OES

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Chinese Science Bulletin 1997年第21期42卷 1792-1795页

作者： zhao, j Kang, N Wang, jG Wang, RY Xu, jR Chinese Acad Sci Inst Phys Lab Opt Phys Beijing 100080 Peoples R China

OPTICAL emission spectroscopy (OES) is generally used in diagnosis on the various plasma filmdeposition processes to understand the mechanism of film growth. However, although the de-position precursors have been predicted such as CN radicals and nitrogen atoms, up tonow no diagnostic work on CN_x film deposition process, as we know, has been reported *** previously reported research work, the properties of CN_x film display some obvious dif-ference. For instance, some CN_x films have extreme mechanical properties with hardness

关键词： carbon nitride fiim optical emission spectras optical gap.

Physical Simulation of Thermally Induced Martensite Formation from Retained Austenite in TRIP Steels

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journal of Materials Science & Technology 2003年第Z1期19卷 105-108页

作者： Lie zhao Fred j. VERMOLEN jilt SIETSMA Sybrand van der ZWAAG Netherlands Institute for Metals Research P.O.Box 5008 2600 GA Delft The Netherlands Department of Materials Science Delft University of Technology R otterdamseweg 137 2628 AL Delft The Netherlands Department of Applied Mathematics Delft University of Technology Mekelweg 4 2628 CD Delft The Netherlands Department of Materials ScienceDelft University of TechnologyRotterdamseweg 1372628 AL DelftThe Netherlands Netherlands Institute for Metals Research P.O.Box 5008 2600 GA Delft The Netherlands Faculty of Aerospace Engineering Delft University of Technology Kluyverweg 1 2629 HS Delft The Netherlands

The present work analyses the total free energy of the material during the martensitic transformation. A general expression for the martensite fraction as a function of temperature is derived, assuming that the nonchemical free energyis proportional to the volume of martensite. This expression indicates that the temperature-dependent martensitefraction can be predicted once the characteristic transformation temperatures and the relation between the chemicalfree energy and temperature of the martensite and austenite are known. An advantage of this development is thatthe proposed equation is valid for all types of relations between the chemical free energy and temperature. Thissimulation is successfully applied to the martensitic transformation upon further cooling of retained austenite in alow-alloyed TRIP steel, in which the relation between chemical free energy and temperature is quadratic and thefraction is determined from a thermo-magnetic measurement.

关键词： Thermodynamics, Martensitic transformation, Retained austenite, TRIP steels.

Compression Stability of Reversed Austenite in 9Ni Steel

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journal of Materials Science & Technology 2012年第6期28卷 558-561页

作者： S.H.Chen M.j.zhao X.Y.Li L.j.Rong Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

The effect of compressive stress on the stability of reversed austenite in gNi steel was investigated by uni- axial and hydrostatic compression. It was found that the uniaxial compressive pressure promoted the Υ-α transformation, while the hydrostatic pressure suppressed the -Υ-α transformation. The pressure dependent transformation behavior can be explained according to thermodynamic analysis.

关键词： 9Ni steel Martensite Reversed austenite Hydrostatic pressure Uniaxial compressive pressure

Active{1121}and{1012}extension twinning in a WE43 Mg alloy

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journal of Materials Science & Technology 2023年第13期144卷 93-101页

作者： W.Q.Chen S.Deng X.j.zhao S.N.Luo Key Laboratory of Advanced Technologies of Materials Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China The Peac Institute of Multiscale Sciences Chengdu 610031China

Deformation twinning in a WE43 alloy subjected to uniaxial compression at room temperature is ***{1121}and{1012}extension twinning is *** activation of{1121}twinning in a certain grain is influenced not only by its own Schmid factor,but also by that of the basal ***-twin interactions of the co-zone{1121}twin variants are commonly observed and systematically studied,including the crystallographic characteristics of the four typically observed twin-twin junctions(TTjs)and the associated twin-twin *** the quilted-looking TTjs formed by the interaction of co-zone{1012}twin variants,crossing-like TTjs of co-zone{1121}twin variants are observed and their formation mechanisms are ***-like TTjs are also formed by the interaction of{1121}and{10¯12}*** morphology and thickening rate of{1121}and{1012}twins vary markedly due to the difference in twinning *** needle-like{1121}twins thicken more slowly than the lenticular{1012}*** nucleation is observed on the previously formed{1121}twin boundary due to the relatively large strain concentration on such interface,while twin nucleation on{1012}twin boundary is rarely observed.

关键词： Mg alloy Plastic deformation Twinning Twin-twin interaction Twin-twin junction

Investigation of Linear Tetra-Atomic Negative Ion by Photodetached-Electron Spectra

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Chinese Physics Letters 2011年第8期28卷 87-90页

作者： A.Rahman Iftikhar Ahmad A.Afaq M.Haneef H.j.zhao Department of Physics Hazara UniversityMansehraPakistan Department of Physics University of MalakandChakdaraPakistan Centre of Excellence in Solid State Physics University of the PunjabQuid-e-Azam CampusLahore-54590Pakistan School of Physics and Information Science Shanxi Normal UniversityLinfen 041004

Photodetachment spectra from a linear tetra-atomic negative ion is investigated by treating the detached-electron wave function quantum mechanically.A plane polarized laser light,perpendicular to the axis of the ion,is used to detach the electron from the *** expressions for the electron flux and total photodetachment cross section are *** electron flux on screen shows strong-energy-dependent oscillations with different *** total cross section of the tetra-atomic negative ion reduces the cross section of mono-atomic,diatomic and triatomic negative ions for high energy photons,while for low energy photons it becomes four times the cross section of mono-atomic negative ions.

关键词： Electron polarized Investigation

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巴西圆盘劈裂试验中拉伸模量的解析算法

岩石力学与工程学报 2010年第5期29卷 881-891页

作者：宫凤强李夕兵 zhao j 中南大学资源与安全工程学院湖南长沙410083 瑞士洛桑联邦理工大学岩石力学实验室瑞士洛桑CH-1015

提出巴西圆盘劈裂试验中拉伸模量的解析算法。结合圆盘对心受力的理论弹性解和实际试验过程中便于测量的物理参数,基于微积分的原理,通过对试样中心垂直加载方向上每一点拉应变的积分,可以得到该方向上总的变形量,进而推导出岩石拉伸模... 详细信息

提出巴西圆盘劈裂试验中拉伸模量的解析算法。结合圆盘对心受力的理论弹性解和实际试验过程中便于测量的物理参数,基于微积分的原理,通过对试样中心垂直加载方向上每一点拉应变的积分,可以得到该方向上总的变形量,进而推导出岩石拉伸模量和总位移变形量之间的定量关系式。该关系式包含加载力、试样直径、试样厚度、岩石泊松比和试样中心垂直加载方向上总位移变形量5个物理量,其意义明确,运用简便,可为求解巴西劈裂试验拉伸模量提供一种新的方法。

关键词：岩石力学巴西圆盘劈裂试验拉伸模量拉伸试验岩石材料

High-Temperature Oxidation Behavior of a Ni-Cr-W-Al Alloy

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journal of Materials Science & Technology 2011年第9期27卷 841-845页

作者： Y.C. Ma X.j. zhao M. Gao K. Liu Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A study was conducted to examine the isothermal oxidation behavior of a new Ni-Cr-W-AI alloy in air at 1250℃ with different time. Oxidation kinetics was determined from weight-change measurements. The microstructure and composition of the oxide scale were investigated by means of scanning electron microcopy and X-ray diffraction. The results showed that the oxide scales of the alloy were a compact and continuous outer Cr2O3 and NiCr2O4 layer and an inner Al2O3 layer that was in dendrite shape. Oxides scales with good adherence were formed on the surface of the alloy, which made the alloy perform excellent high-temperature oxidation resistance.

关键词： Oxidation kinetics Oxide scale High-temperature oxidation resistance

Composition and Equation of State of the Lower Mantle from the p VT Data of Perovskite

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矿物学报 2007年第Z1期27卷 82-83页

作者： Hui zhao D.j.Weidner Yun Liu Institute of Geochemistry Chinese Academy of SciencesGZ 550002China Dept.of Geoscienees SUNY at Stony BrookStony BrookNY 11790USA Dept.of Geoscienees SUNY at Stony BrookStony BrookNY 11790USA Institute of Geochemistry Chinese Academy of SciencesGZ 550002China

　　For the earth's lower mantle, a long-standing issue is whether it has a composition similar to that of the upper mantle represented by Ringwood's py-rolite model. Although a homogeneous mantle issupported by geophysical studies, and also used as an apriori assumption to estimate the composition of the bulk silicate earth (BSE) or primitive mantle( PM), it is inconsistent with a number of geochemi-cal observations.……

关键词： Lower Mantle upper mantle lower mantle the earth