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Analysis of Microstructure and Orientation in X80 Line Pipe steels

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Journal of Iron and steel Research International 2011年第S1期18卷 664-668页

作者： JI Ling-kang 1,2.LI Yang 2.3.MENG Li 3.LI He-lin 2.(1.school of {3. science and Engineering,Xi’an Jiaotong university,Xi’an 710049,shaanxi,{2. 2.CNPC Tubular Goods Research Institute,Xi’an 710065,shaanxi,{2. 3.school of {3. science and Engineering,university of science and technology Beijing,Beijing 100083.{2.) Xi An Jiao Tong Univ Sch Mat Sci & Engn Xian 710049 Shaanxi Peoples R China CNPC Tubular Goods Res Inst Xian 710065 Shaanxi Peoples R China Univ sci & Technol Beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China

Microstructures in X80 line pipe were classified by sEM *** experimental results showed that the microstructures in X 80 line pipe steels were complicated consisting of polygonal ferrite,bainite and acicular *** relation within acicular ferrite was investigated systematically by means of *** sub-structures were observed maximum in acicular ferrite which gives high strength and high toughness to line pipe *** K-s orientation relation was generally observed between acicular ferrite and austenite during phase *** low energy CsL boundary characterized by Σ3.orientation relation according to Brandon criterion appeared with higher probability,which was benefit to improve the mechanical properties of line pipe *** orientations or texture of initial austenite grains could be deduced based on the Σ3.orientation relationship of acicular ferrite variants.

关键词： acicular ferrite EBsD K-s orientation relation TMCP

Application of Fourier slice Theorem in Wigner Operator Theory and New Complete Representation

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Communications in Theoretical Physics 2009年第11期52卷 829-831页

作者： WANG Tong-Tong~1 and FAN Hong-Yi~(2.3.1 school of Mathematics and Physics, Huangshi Institute of technology, Huangshi 43.003. china2.{2.ent of material science and Engineering, university of science and technology of china, Hefei 2.002., china3.{2.ent of Physics, shanghai Jiao Tong university, shanghai 2.003., china school of Mathematics and Physics Huangshi Institute of Technology Huangshi 435003 China department of material science and Engineering University of Science and Technology of China Hefei 230026 China department of Physics Shanghai Jiao Tong University Shanghai 200030 China

By applying the Fourier slice theorem,s;（λ）=∫;P;（t）e;=F（λcosθ,λsinθ）,where P;（t）is aprojection of f（x,p）=（?）F（u,v）e;dudv along lines of constant,to the Wigner operator we are naturally led toa projection operator（pure state）,which results in a new complete *** Weyl orderimg formalism of theWigner operator is used in the derivation.

关键词： Wigner operator Fourier slice theorem new complete representation

Effect of Ultrafine Grinding on Dissolving-out Quantity of Tanshinone IIA from Radix salvia Miltiorrhiza

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Journal of Wuhan university of technology({2.s science) 2009年第6期24卷 973-976页

作者：苏艳丽傅正 College of Chemistry Chemical Engineering and Material ScienceSoochow UniversitySuzhou China state Key Laboratory of Advanced technology for material synthesis and Processing Wuhan University of Technology

In order to improve the bioavailability, Radix salvia miltiorrhiza raw powder mixed with distilled water （5.5wt%） was ultrafinely ground to nanosize particles using HsCs pulverizer, and the dissolving-out quantity of tanshinone IIA in the filtrate that obtained from nanoparticles suspension and raw powder marinated in water for different time was determined by HPLC. The experimental results show that raw powder can be ultrafinely ground to 13..5 nm at 1500 r/min for 50 min and the molecular structure of active ingredients doesnot change, and the dissolving-out quantity of tanshinone IIA obtained from the filtrate is increased greatly from 12.77 μg/g to 54.55 μg/g.

关键词： Radix salvia miltiorrhiza tanshinoe IIA HPLC dissolving-out quantity

Enhanced surface Properties Induced by High Current Pulsed Electron Beam (HCPEB) Treatment

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稀有金属材料与工程 2011年第S4期40卷 178-180页

作者： Hao shengzhi1,2.Wang Huihui1,2.Li Mincai1,3.Xu Yang1,3.Dong Chuang1,3.1Key Laboratory of materials Modification by Laser,Ion and Electron Beams,Ministry of Education,Dalian {3. of {2.,Dalian 11602.,china2.chool of Physics and Optoelectronics Engineering,Dalian {3. of {2.,Dalian 11602.,china3.chool of material science and Engineering,Dalian {3. of {2.,Dalian 11602.,china Dalian Univ Technol Minist Educ Key Lab Mat Modificat Laser Ion & Electron Beams Dalian 116024 Peoples R China Dalian Univ Technol Sch Phys & Optoelect Engn Dalian 116024 Peoples R China Dalian Univ Technol Sch Mat Sci & Engn Dalian 116024 Peoples R China

High current pulsed electron beam (HCPEB) has been developed as a useful tool for surface treatment of *** the present work,the fundamental principle of HCPEB source was described along with the device configuration and working *** the different kinds of HCPEB surface treatment experiments conducted,the enhanced surface properties induced by HPCEB treatment were illustrated and explained with their microstructure characterization results.

关键词： high current pulsed electron beam surface treatment microstructure property

synthesis and Electrochemical Properties of Cr-doped Li_3._2.PO_4)_3.Cathode materials for Lithium-ion Batteries

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Journal of Wuhan university of technology({2.s science) 2009年第3期24卷 343-346页

作者：钟胜奎 department of material and Chemistry Guilin University of Technology Key Laboratory of New Processing technology for Nonferrous Metals and materials Ministry of Education Guilin University of Technology

Cr-doped Li3.2.PO4）3.cathode materials Li3.2.xCr（PO4）3.were prepared by a carbothermal reduction（CTR） process. The properties of the Cr-doped Li3.2.PO4）3.were investigated by X-ray diffraction （XRD）, scanning electron microscopic （sEM）, and electrochemical measurements Results show that the Cr-doped Li3.2.PO4）3.has the same monoclinic structure as the undoped Li3.2.PO4）3. and the particle size of Cr-doped Li3.2.PO4）3.is smaller than that of the undoped Li3.2.PO4）3.and the smallest particle size is only about 1 1μm. The Cr-doped Li3.2.PO4）3.samples were investigated on the Li extraction/insertion performances through charge/discharge, cyclic voltammogram （CV）, and electrochemical impedance spectra（EIs）. The optimal doping content of Cr was that x=0.04 in the Li3.2.xCrx（PO4）3.samples to achieve high discharge capacity and good cyclic stability. The electrode reaction reversibility was enhanced, and the charge transfer resistance was decreased through the Cr-doping. The improved electrochemical performances of the Cr-doped Li3.2.PO4）3.cathode materials are attributed to the addition of Cr^3. ion by stabilizing the monoclinic structure.

关键词： lithium ion batteries cathode material Li3.2.PO4)3 Cr-doping carbothermal reduction method cyclic voltammogram (CV)

Influences of low-Ti substitution for La and Mg on the electrochemical and kinetic characteristics of AB_3.type hydrogen storage alloy electrodes

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science china(Technological sciences) 2010年第1期53卷 242-247页

作者： DONG ZhenWei1,2.WU YaoMing1,MA LiQun2.sHEN XiaoDong2.& WANG LiMin1 1 state Key Laboratory of Rare Earth Resource Utilization,{3. Institute of Applied Chemistry,Chinese Academy of sciences,C hangchun 13.02.,{2. 2.College of material science and Engineering,Nanjing university of technology,Nanjing 2.0009,{2. 1. state Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China2. College of Material Science and Engineering Nanjing University of Technology Nanjing 210009 China

The(La0.67Mg0.3.)1-xTixNi2.75Co0.2.(x = 0,0.05,0.10,0.15 and 0.2.,at%) alloys were synthesized by arc melting and subsequent heat solid-liquid diffusing *** structure,electrochemical properties and kinetic characteristics of the alloys were investigated *** results showed that all the alloys mainly consisted of the(La,Mg)Ni3.LaNi5 phases,and the lattice parameters and the cell volumes of the(La,Mg)Ni3.and LaNi5 phases decreased with increasing Ti *** alloy electrodes could be activated to reach their maximum discharge capacity within five *** cycle life after 100 charge/discharge cycles(C100/Cmax) and the high-rate dischargeability at a discharge current density of 12.0 mA/g first increased and then *** the results showed that low-Ti content in AB3.type hydrogen storage alloys was beneficial to improvements of the overall electrochemical properties,and the optimum overall electrochemical performance of the alloy electrodes was obtained when x = 0.05.

关键词： AB3.type alloy metal hydride electrode microstructure electrochemical property kinetic characteristic

Anticoagulation property and security of artificial heart valve material

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science china(Technological sciences) 2005年第2期48卷 145-162页

作者： WANG Xianghui1, , LIU Xianghuai1,2., 3. ZHANG Feng2. LI Changrong2. YU Liujiang2. ZHENG Zhihong2. WANG Xi2. JIANG Zhenbin4, CHEN Anqing4 & XU Jingfang3.1. department of Physics, East china Normal {2., shanghai 2.0062. china 2. Ion Beam Lab, shanghai Institute of Mini-system and information, Chinese Academy of sciences,shanghai 2.0050, china 3. department of Electronics, school of Information science and technology, East china Normal Univer- sity, shanghai 2.0062. china 4. shanghai Cardiovascular Institute, Zhongshan Hospital, shanghai 2.003.0} china 1. department of Physics East China Normal University 200062 Shanghai China 2. Ion Beam Lab Shanghai Institute of Mini-system and information Chinese Academy of Sciences 200050 Shanghai China 3. department of Electronics School of Information Science and Technology East China Normal University 200062 Shanghai China 4. shanghai Cardiovascular Institute Zhongshan Hospital 200032 Shanghai China

Heart valve diseases threaten human health. One reliable way to save lives of such patients is to replace the pathologically changed heart valves by artificial ones. Over 2.million patients have received LTI-carbon heart valve’s implantation. However, the thrombosis after the implantation is one of the difficulties that need to be solved. In order to improve the blood compatibility and security of mechanical heart valves, ion beam technology was used to modify the surface properties of the materials. The investigation results have been summarized in this paper.

关键词： artificial heart valve, ion implantation, plasma immersed ion implantation, ion beam enhanced deposition.

A new navigation approach of terrain contour matching based on 3.D terrain reconstruction from onboard image sequence

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science china(Technological sciences) 2010年第5期53卷 1176-1183页

作者： LI LiChun1,2.YU QiFeng2.sHANG Yang2.YUAN Yun2.LU HongWei3.& LIU XiaoLin4 1 Beijing Aerospace Control Center,Beijing 100094,china 2.College of Aerospace and material Engineering,National {2. of Defense technology,Changsha 410073.china 3.Equipment Research Institute of PLA’s second Artillery,Beijing 100085,china 4 College of Mechatronic Engineering and Automation,National {2. of Defense technology,Changsha 410073.china 1. Beijing Aerospace Control Center Beijing 100094 China2. College of Aerospace and Material Engineering National University of Defense Technology Changsha 410073 China3. Equipment Research Institute of PLA’s Second Artillery Beijing 100085 China4. College of Mechatronic Engineering and Automation National University of Defense Technology Changsha 410073 China

This article presents a passive navigation method of terrain contour matching by reconstructing the 3.D terrain from the image sequence(acquired by the onboard camera).To achieve automation and simultaneity of the image sequence processing for navigation,a correspondence registration method based on control points tracking is proposed which tracks the sparse control points through the whole image sequence and uses them as correspondence in the relation geometry ***,a key frame selection method based on the images overlapping ratio and intersecting angles is explored,thereafter the requirement for the camera system configuration is *** proposed method also includes an optimal local homography estimating algorithm according to the control points,which helps correctly predict points to be matched and their speed ***,the real-time 3.D terrain of the trajectory thus reconstructed is matched with the referenced terrain map,and the result of which provides navigating *** digital simulation experiment and the real image based experiment have verified the proposed method.

关键词： terrain contour matching vision-based navigation 3.D reconstruction control points key frame registration optimal local homography

Experimental Investigation on Viscosity of Cu-H_2. Nanofluids

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Journal of Wuhan university of technology({2.s science) 2009年第1期24卷 48-52页

作者：李新芳 department of Packaging & Printing Zhongshan Torch Vocation and Technology College

A procedure for preparing a nanofluid that a solid-liquid composite material consists of solid nanoparticles with sizes typically of 1-100 nm suspended in liquid was proposed. By means of the procedure, Cu-H2. nanofluids with and without dispersant were prepared, whose sediment pho-tographs and particle size distribution were given to illustrate the stability and evenness of suspension with dispersant. The viscosity of Cu-H2. nanofluid was measured using capillary viscometers. The mass fractions（w） of copper nanoparticles in the experiment varied between 0.04% and 0.16% with the temperature range of 3.-70 ℃. The experimental results show that the temperature and sDBs concentration are the major factors affecting the viscosity of the nano-copper suspensions, while the effect of the mass fraction of Cu on the viscosity is not as obvious as that of the temperature and sDBs dispersant for the mass fraction chosen in the experiment. The apparent viscosity of the copper nano-suspensions decreases with the temperature increase, and increases slightly with the increase of the mass fraction of sDBs dispersant, and almost keeps invariability with increasing the mass fraction of Cu. The influence of sDBs concentration on the viscosity of nano-suspension was relatively large comparing with that of the nanoparticle concentration.

关键词： nano-Cu/water suspension sDBs kinematic viscosity capillary viscometer