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Journal of Materials Science & technology 2024年第1期168卷 157-168页

作者： Taoyu Zhou Jiuxu Yang Nan Li Hao Sun Bohua Zhang Zibo Zhao Qingjiang Wang 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

The fabrication of ultrafine-grained microstructures(grain size below 1μm)in titanium alloys is beneficial for improving their mechanical properties at room temperature and medium tempera-tures(400-550°C).However,a long-standing challenge involves the low-cost manufacturing of bulk ultrafine-grained titanium *** this work,we developed a facile strategy through martensite de-composition at thermal-mechanical coupling conditions,to fabricate an equiaxed microstructure in a Ti6Al4Mo4Zr1W0.2Si model alloy with an averageαgrain size of 315±62 *** formation of the ultrafine-grained microstructure was because the lattice strain stored in the martensitic initial mi-crostructure enhanced the nucleation rate of dynamic recrystallization,meanwhile,the pinning role of martensite decomposition productsβand(Ti,Zr)_(5)Si_(3)phases suppressed grain coarsening at high *** to conventional(α+β)alloys,the tensile strength of this alloy improved by 20%-30%at both room temperature and 550°C,without decreasing its *** situ SEM observations revealed that the ultrafine-grained microstructure would not only suppress dislocation motions but also contribute to the homogenous deformation in the matrix of the material,therefore,it resulted in higher mechanical *** research results may be of great significance to the development of next-generation aviation titanium alloys.

关键词： Ultrafine-grained Titanium alloy In situ observation Deformation mechanism Thermostability

A Manta Ray-Inspired Biosyncretic Robot with Stable Controllability by Dynamic Electric Stimulation

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Cyborg and Bionic Systems 2022年第1期2022卷 314-326页

作者： Chuang Zhang Yiwei Zhang Wenxue Wang Ning Xi Lianqing Liu State Key Laboratory of Robotics Shenyang Inst itute of AutomationChinese Academy of SciencesShenyang 110016China institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169China School of Automation and Electrical Engineering shenyang Ligong University Shenyang 110159China Emerging technologies institute Department of Industrial Manufacturing Systems Engineering University of Hong KongPokfulamChina

Biosyncretic robots,which are new nature-based robots in addition to bionic robots,that utilize biological materials to realize their core function,have been supposed to further promote the progress in *** as the main operation mechanism relates to the robotic overall ***,biosyncretic robots actuated by living biological actuators have attracted increasing ***,innovative propelling modes and control methods are still necessary for the further development of controllable motion performance of biosyncretic *** this work,a muscle tissue-based biosyncretic swimmer with a manta *** propelling mode has been *** is more,to improve the stable controllability of the biosyncretic swimmer,a dynamic control method based on circularly distributed multiple electrodes(CDME)has been *** this method,the direction of the electric field generated by the CDME could be real-time controlled to be parallel with the adtuation tissue of the dynamic ***,the instability of the tissue actuation induced by the dynamic included angle between the tissue axis and electric field direction could be ***,the biosyncretic robot has demonstrated stable,controllable,and efective swimming,by adjusting the electric stimulation pulse direction,amplitude,and *** work may be beneficial for not only the development of biosyncretic robots but also other related studies including bionic design of soft robots and muscle tissue engineering.

关键词： Robot robot Dynamic

Optimizing the electronic spin state and delocalized electron of NiCo_(2)(OH)_(x)/MXene composite by interface engineering and plasma boosting oxygen evolution reaction

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Journal of Energy Chemistry 2022年第8期31卷 129-140,I0004页

作者： Jingyao Xu Xia Zhong Xiaofeng Wu Ying Wang Shouhua Feng State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012JilinChina Chinese Acad Sci Inst Met ResShenyang Natl Lab Mat SciShenyang 110016LiaoningChina Univ Sci&technol China Sch Mat Sci&EngnShenyang 110016LiaoningChina State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina

The electrocatalytic activity of transition-metal-based compounds is closely related to the electronic ***,optimizing the surface electron spin state of catalysts remains a ***,we developed a spin-state and delocalized electron regulation method to optimize oxygen evolution reaction(OER)performance by in-situ growth of NiCo_(2)(OH)_(x) using Oswald ripening and coordinating etching process on MXene and plasma treatment.X-ray absorption spectroscopy,magnetic tests and electron paramagnetic resonance reveal that the coupling of NiCo_(2)(OH)_(x) and MXene can induce remarkable spin-state transition of Co^(3+)and transition metal ions electron delocalization,plasma treatment further optimizes the 3 d orbital structure and delocalized electron *** unique Jahn-Teller phenomenon can be brought by the intermediate spin state(t2 _(g)^(5) e_(g)^(1))of Co^(3+),which benefits from the partial electron occupied *** distinct electron configuration(t2_(g)^(5) e_(g)^(1))with unpaired electrons leads to orbital degeneracy,that the adsorption free energy of intermediate species and conductivity were further *** optimized electrocatalyst exhibits excellent OER activity with an overpotential of 268 m V at 10 m A cm^(-2).DFT calculations show that plasma treatment can effectively regulate the d-band center of TMs to optimize the adsorption and improve the OER *** approach could guide the rational design and discovery of electrocatalysts with ideal electron configurations in the future.

关键词： Transition metal compounds Electronic state control of surface/interface Electron spin state Delocalized electron Electrocatalytic material

Rare Earth Effects on Adhesion of Cr_2O_3 Oxide Scale Formed on Surface of Co-40Cr Alloy

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Journal of Rare Earths 2001年第1期19卷 34-39页

作者：靳惠明张林楠李美栓李铁藩 shenyang Univ. of technol. Shenyang 110023 China

Isothermal and cyclic oxidation behaviors of Co 40Cr alloy at 1000 ℃ in air were studied. Scanning electron microscopy (SEM) was used to examine the oxide scale formed on the surface of the alloy. By comparing the oxidation behaviors of Co 40Cr alloy and its 3×10 16 and 3×10 17 Y +/cm 2 implanted specimens, it was found that the resistant to oxidation property of Co 40Cr was greatly improved due to the implantation of yttrium. Acoustic emission was used to study the distribution of defects at the interface between the scale and alloy. Raman spectrum was also used to study the stress status in chromic scale formed on the surface of Co 40Cr with and without yttrium. The main reason for the improvement of resistant to oxidation property of Y doped Co 40Cr probably is that yttrium can segregate to Cr 2O 3 grain boundaries and change the scale′s growing mechanism and mechanical property. Most importantly, Y implantation decreases the size and number of interfacial defects and the residual stress in the scale, and remarkably enhances the adhesion of chromia scale with Co 40Cr substrate.

关键词： rare earths adhesion oxidation acoustic emission Raman spectrum

Ligand Substituent Electronic Effect in Ternary Complexes—— Systems of Zn2+(Cd2+)-bipy(phen)-substituted Salicylic Acid System

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Chinese Science Bulletin 1994年第13期39卷 1101-1105页

作者：高恩君原晓红刘祁涛 shenyang inst CHEM technol DEPT FINE CHEM TECHNOLSHENYANG 110221PEOPLES R CHINA

Research has been done on the cooperating effect of π electronic transformation between the ligands in some transition metal ternary complexes. The effect can remarkably affect the stability of ternary complexes. For... 详细信息

关键词： ternary complexes electronic effect stability.

An On-line Monitoring System for Hydrogen Distribution in the Metallic Wall Caused by Hydrogen Permeation

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Journal of Materials Science & technology 2001年第3期17卷 346-350页

作者： Gang YU shenyang University of technology, 110023, China Xueyuan ZHANG and Yuanlong DU State Key Laboratory for Corrosion and Protection, institute of Metal Research, Chinese Academy of Sciences, shenyang 110016, China E-mail: yugang@*** shenyang Univ. of technol. Shenyang 110023 China

Based on the electrochemical permeation technique and the patent by Du, an intelligent elec-trochemical measurement system for determination of the hydrogen distribution in the wall of hydrogenation reactor has been developed and tested. It consists of a PC computer, a single chip unit, an I/V converter and an electrochemical hydrogen probe. The construction of the electrochemical hydrogen probe is described and the features of the measured system are given. The diffusion coefficient of 2.25CrlMo steel determined with present system was in good agree-ment with the value in the literature. Experimental results of hydrogen concentration in a wall of hydrogen charged testing autoclave made of AISI 321 stainless steel are presented. The present system can intelligently display hydrogen amount-of-substance concentration and mass fraction concentration, hydrogen concentration distribution curves in steels, permeation current density curve. An intelligent detection technique can be provided for predicting the susceptibility to hydrogen-induced cracks owing to hydrogen permeation in the wall of hydrogenation reactor in the field.

关键词： Hydrogen bonds

Synthesis and photocatalytic properties of lanthanum doped anatase TiO_2 coated Fe_3O_4 composites

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Rare Metals 2011年第3期30卷 252-257页

作者： Zhongliang Shi Xiaoyan Zhang Shuhua Yao shenyang Univ Chem technol Sch Appl Chem Shenyang 110142 Peoples R China

A composite photocatalyst （La/TiO2/Fe3O4） with a lanthanum doped TiO2 （La/TiO2） shell and a magnetite core was prepared by coating photoactive La/TiO2 onto a magnetic Fe3O4 core. The morphological, structural, and optical properties of as-prepared samples were charac-terized by transmission electron microscopy （TEM）, X-ray diffraction （XRD） and UV-vis absorption spectroscopy. The effect of lanthanum content on the photocatalytic properties was studied, and the result revealed that 0.15 mol% La/TiO2/Fe3O4 exhibited the highest photoactiv-ity. The photocatalytic properties of the prepared photocatalyst under UV and visible light were investigated in aqueous solution using methyl orange （MO） as a target pollutant. The results showed that the prepared photocatalyst was activated by visible light and used as an ef-fective catalyst in photooxidation reactions. In addition, the possibility of cyclic usage of the prepared photocatalyst was also confirmed. Moreover, La/TiO2 was tightly bound to Fe3O4 and could be easily recovered from the medium by a simple magnetic process.

关键词： titanium dioxide magnetite lanthanum doping photocatalytic activity methyl orange

STUDY OF ELECTROMAGNETIC STIRRING REFINING MICRO-STRUCTURES OF PIPE-LINE STEEL SAW DEPOSITS

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Acta Metallurgica Sinica(English Letters) 2002年第4期15卷 396-400页

作者： Y.Zhang,B.N.Qian and X.M.Guo shenyang University of technology, shenyang 110023, China State Key Laboratory of Corrosion and Protection, institute of Metal Research, The Chinese Academy of Sciences, shenyang 110016, ChinaManuscript received 10 October 200 shenyang Univ. of technol. Shenyang 110023 China

The effects of electromagnetic stirring on the microstructures of pipe-linesteel SAW deposited metal were investigated. The results showed that electromagnetic stirringincreased the number density of inclusions with 0.2-0.6 mum in diameter and promoted the formationand refining of acicular ferrite within austenite grains. The low temperature toughness of depositedmetal was improved.

关键词： electromagnetic stirring acicular ferrite deposit

MECHANICAL PROPERTIES IN AN INTERCRITICALLY HEAT-TREATED BAINITE-TRANSFORMED 2%Si STEEL

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 725-731页

作者： Z. Li1,2) and D. Wu1)1) State Key Lab of Rolling and Automation, Northeastern University, shenyang 110004, China2) institute of Aeronautical Engineering, shenyang 110034, China Lab. of Rolling technol. Northeastern Univ. Shenyang 110004 China inst. of Aeronautical Eng. Shenyang 110034 China

A significant amount of austenite can be retained by rapid cooling following intercritical annealing and holding at the bainite transformation range in steel with comparatively low carbon and silicon contents. Retained austenite is blocky and very fine and moderately stabilized due to C enrichment. The elongation and the strength-ductility balance of the steel can be enhanced considerably due to strain-induced martensite transformation and transformation-induced plasticity (TRIP) of retained austenite.

关键词： mechanical properties intercritical annealing retained austenite bainite transformation steel

Microstructure and Mechanical Properties of Ti-35V-15Cr-0.05C Nonburning Titanium Alloy

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Journal of Materials Science & technology 1998年第5期14卷 411-414页

作者： Li, Geping Li, Dong Liu, Yuyin Wang, Qingjiang Guan, Shaoxuan Li, Qingchun Acad Sinica Inst Met Res Shenyang 110015 Peoples R China Harbin inst technol Harbin 150001 Peoples R China

Ti-35V-15Cr-0.05C is a new nonburning titanium alloy. The structural analyses show that the alloy consists of beta phase and lath-like alpha phase distributed within beta grains, and some titanium carbide particles appear at grain boundaries. Using dark field TEM method, it was also found that TiCr//2 phase uniformly precipitates in alpha phase. After heat treatment at 900 degree C for 15 min, equiaxed beta phase of 60-80 mu m in diameter and lath-like alpha phase of 1-2% volume fraction were observed. This alloy possesses attractive mechanical properties. (Edited author abstract) 5 Refs.

关键词： Titanium alloys