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Production of the C/TiO_(2)composite with a high-performance electrochemical property from titanium-rich sludge via in-situ C coating

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Journal of Environmental Sciences 2024年第3期137卷 131-143页

作者： Hualong Wu Yanxia Zhao Jiexi Wang Xiaoyan Li Kaimin Shih Xuguang Li Wei Liu School of Water Conservancy and Environment University of JinanJinan 250022China State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of MaterialsXiamen UniversityXiamen 361005China School of Metallurgy and Environment Central South UniversityChangsha 410083China department of Civil Engineering The University of Hong KongPokfulamHong KongChina Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

Resource recycling from waste-water and sludge is an important part of the 14th Five-Year Plan in *** emerging titanium-based coagulants have drawn growing attentions due to their strong coagulation capability in water purification and value-added Ti-loaded sludge *** and recovery of the high value-added sludge into functional nanomaterials is highly significant for both sludge reduction and environmental *** present study was carried out to investigate the recycle of the coagulated Ti-loaded sludge to produce functional C/TiO_(2)composites as the anode materials for lithium-ion batteries(LIBs).It is the first time that the application of the Ti-loaded wastewater sludge derived C/TiO_(2)was evaluated for *** experimental results showed that the carbon coating through in-situ carbonization of the sludge produced the C/TiO_(2)composites with a high specific surface area,stable structural integrity,and excellent electrochemical properties that would facilitate Li+diffusion in long-term LIBs *** C/TiO_(2)composites calcinated from the polytitanium sulfate-coagulated sludge at 800℃(N_(2))exhibited the best electrochemical performance during the cycling tests(601 m Ah/g at 100 m A/g after 200 cycles).The research work demonstrates the promising prospect of the recycle and value-added utilization of the Ti-loaded sludge in the production of high-performance C/TiO_(2)composites for energy storage *** study provides a new way for the management and reuse of Ti-loaded waste-sludge.

关键词： Sludge recovery Ti-loaded sludge In-situ coating Lithium-ion battery

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Up-grading of natural ilmenite ore by combining oxidation and acid leaching

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International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 729-736页

作者： takehito hiraki yuichi maruyama yuta suzuki satoshi itoh tetsuya nagasaka department of Metallurgy Graduate School of EngineeringTohoku UniversitySendai 980-8579Japan Toho titanium Co. Ltd.Kanagawa 253-8510Japan Fanuc Co. Ltd.Oshino-muraYamanashi 401-0511Japan Before retirement:Graduate School of Environmental Studies Tohoku UniversitySendai 980-8579Japan

Rutile （TiO2） is heavily used in pigments mid colormlts, mid the most abundmlt source of rutile is ilmeinte. Upon oxidation of ilmeinte, mtile cml be formed wiffl modest energy consumption; furfflermore, after leaching, only a few byproducts are formed. Unfortunate- ly, one drawback is file necessarily long oxidative process of typically used mefflods. In fflis study, we show fflat a fluidized bed reactor cml be used to oxidize ilmeinte ore to rapidly form ruffle mid pseudobrookite （Fe2TiOs） phases. Ilmeinte was oxidized wiffl 5vo1% 02 in Ar at temperatures of 1173 K or 1223 K mid subsequently leached using a diluted H2SO4 solution to dissolve file pseudobrookite phase. The effects of acid concentration, temperature, mid cooling rate after oxidation were investigated. We show fflat file ilmeinte was rapidly oxidized to form rutile mid pseudobrookite phases at 1173 mid 1223 K in a 5vo1% O2/95vo1% Ar environment wifflin 40 min. The fmal maximum mtile yield was 84.2mo1% after leaching in （1 ＋ 1） H2SO4 solution at 393 K for 12 h.

关键词： ilmenite oxidation fluidized bed reactor acid leaching rutile pseudobrookite

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Multiple α sub-variants and anisotropic mechanical properties of an additively-manufactured Ti-6Al-4V alloy

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Journal of Materials Science & Technology 2021年第11期70卷 113-124页

作者： Yinling Zhang Zhuo Chen Shoujiang Qu Aihan Feng Guangbao Mi Jun Shen Xu Huang Daolun Chen School of Materials Science and Engineering Tongji UniversityShanghai 201804China department of Mechanical and Industrial Engineering Ryerson UniversityTorontoOntario M5B 2K3Canada Aerospace Hiwing(Harbin)titanium Industrial Co. Ltd.Harbin High Tech ZoneHarbin 150028China Shanghai Key Lab.of D&A for Metal-Functional Materials School of Materials Science&EngineeringTongji UniversityShanghai 201804China Aviation Key Laboratory of Science and Technology on Advanced titanium Alloys AECC Beijing Institute of Aeronautical MaterialsBeijing 100095China College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China

Additive manu facturing(AM)is a promising material processing method which gains significant momentum in the aerospace and biomedical ***,the anisotropy in the mechanical properties of additively-manufactured materials is still poorly *** study was aimed at elucidating crystallographic feature-anisotropy-mechanical property relationship for a Ti-6Al-4V alloy manufactured via selective electron beam melting(SEBM).Abundantαlamellae with six variants were present inside the columnar prior-βgrains with afiber texture duringβ→αphase *** sixαvariants followed the Burgers orientation relationship of{110}_(β)//{0001}_(α)and_(β)//_(α).Multiple sub-variants in eachαvariant were observed for the first *** anisotropy in the mechanical properties was mainly related to the relative amount of sixα*** the horizontally-oriented samples had a lower yield strength,they exhibited a higher ductility and longer fatigue life than the vertically-oriented *** softening occurred at higher strain amplitudes,and cyclic stabilization sustained at lower strain *** crack mainly initiated from the specimen surface at lower strain amplitudes,while multiple crack initiation tended to occur at higher strain *** propagation was characterized by fatigue striations along with some secondary cracks.

关键词： titanium alloy 3D printing Deformation behavior Anisotropy Burgers orientation relationship

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Fatigue properties of titanium alloy custom short stems fabricated by electron beam melting

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Journal of Materials Science & Technology 2020年第17期52卷 180-188页

作者： Liao Wang Shujun Li Mengning Yan Yubo Cheng Wentao Hou Yiping Wang Songtao Ai Rui Yang Kerong Dai Shanghai Key Laboratory of Orthopaedic Implants Department of Orthopaedic SurgeryShanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai Jiao Tong UniversityShanghai 200030China titanium Alloy Laboratory Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Image Medraw Technology(Shanghai)Company Limited Shanghai 201100China

The fatigue properties of titanium alloy short-stems with four different lengths,manufactured by electron beam melting(EBM)technology,were investigated by in vitro test and finite element(FE)*** simulation results indicate that the maximum tensile stress concentrates at the lateral side of the stem *** magnitude of the concentrated tensile stress increases and the corresponding area of the axial section decreases with increasing of stem *** from fatigue tests demonstrate that fatigue cracks mainly initiate from the rough surface of the stem where the maximum tensile stress *** fatigue strength decreases with the increase of stem length,which is attributed to the higher stress concentration on the longer stem *** addition,it is found that post EBM treatment via hot isostatic processing(HIP)is able to enhance the fatigue properties of the stems,since the pores generated during EBM are mostly closed during *** work also demonstrates that the stress concentration on the stem surface can be effectively mitigated and the corresponding fatigue properties of the EBM-fabricated titanium alloy short stem can be considerably improved by optimizing the design in the stem length.

关键词： Custom short stem titanium alloy Electron beam melting Fatigue property

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Recent innovations in laser additive manufacturing of titanium alloys

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International Journal of Extreme Manufacturing 2024年第3期6卷 2-37页

作者： Jinlong Su Fulin Jiang Jie Teng Lequn Chen Ming Yan Guillermo Requena Lai-Chang Zhang Y Morris Wang Ilya V Okulov Hongmei Zhu Chaolin Tan College of Materials Science and Engineering Hunan UniversityChangsha 410082People’s Republic of China Singapore Institute of Manufacturing Technology(SIM Tech) Agency for ScienceTechnology and Research(A∗STAR)5 Cleantech LoopSingapore 636732Singapore department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Institute of Materials Research German Aerospace Center(DLR)Linder Höhe51147 CologneGermany Centre for Advanced Materials and Manufacturing Edith Cowan University270 Joondalup DriveJoondalupPerthWestern Australia 6027Australia department of Materials Science and Engineering University of CaliforniaLos AngelesCA 900095United States of America Leibniz Institute for Materials Engineering-IWT Badgasteiner Str.328359 BremenGermany Faculty of Production Engineering University of BremenBadgasteiner Str.128359 BremenGermany Key Laboratory of Hunan Province of Equipment Safety Service Technology under Extreme Environment University of South ChinaHengyangPeople’s Republic of China RWTH Aachen University Metallic Structures and Materials Systems for Aerospace EngineeringD-52062 AachenGermany

titanium(Ti)alloys are widely used in high-tech fields like aerospace and biomedical *** additive manufacturing(LAM),as an innovative technology,is the key driver for the development of Ti *** the significant advancements in LAM of Ti alloys,there remain challenges that need further research and development *** recap the potential of LAM high-performance Ti alloy,this article systematically reviews LAM Ti alloys with up-to-date information on process,materials,and *** feasible solutions to advance LAM Ti alloys are reviewed,including intelligent process parameters optimization,LAM process innovation with auxiliary fields and novel Ti alloys customization for *** auxiliary energy fields(***,acoustic,mechanical deformation and magnetic fields)can affect the melt pool dynamics and solidification behaviour during LAM of Ti alloys,altering microstructures and mechanical *** kinds of novel Ti alloys customized for LAM,like peritecticα-Ti,eutectoid(α+β)-Ti,hybrid(α+β)-Ti,isomorphousβ-Ti and eutecticβ-Ti alloys are reviewed in ***,machine learning in accelerating the LAM process optimization and new materials development is also *** review summarizes the material properties and performance envelops and benchmarks the research achievements in LAM of Ti *** addition,the perspectives and further trends in LAM of Ti alloys are also highlighted.

关键词： additive manufacturing titanium alloys auxiliary field machine learning aerospace materials lightweight materials novel alloys

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Orientation Dependence of the Micro-Pillar Compression Strength in an Electron Beam Melted Ti-6Al-4V Alloy

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Acta Metallurgica Sinica(English Letters) 2021年第4期34卷 476-484页

作者： Jinsen Tian Jiang Ma Ming Yan Zhuo Chen Jun Shen Jing Wu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen518060China department of Materials Science and Engineering and Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials Southern University of Science and TechnologyShenzhen518055China Aerospace Hiwing(Harbin)titanium Industrial Co. Ltd.Harbin150028China Cryo-EM Center Southern University of Science and TechnologyShenzhen518055China

An α/β two-phase Ti-6Al-4V alloy was fabricated by electron beam melting to obtain a basketweave *** orientation dependence of the mechanical properties of Ti-6Al-4 V alloy was studied by micro-pillar compression and post-mortem transmission electron microscopy *** results indicate that different grains have different mechanical responses,and the possible attributions were *** the orientation effect,due to the limited volumes of micropillars,the size of the a phases,dispersion of the β phases,and the presence of the free dislocation path also affect the mechanical properties of the micropillars to a large *** no direct link was discovered between the mechanical properties and the parent β orientations,this work provided a promising method to further study the anisotropic mechanical behavior in Ti-6Al-4V alloy.

关键词： Electron beam melting(EBM) Ti-6Al-4V Micro-pillar compression Orientation dependence Mechanical properties

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The corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy:Effects of HCl concentration and temperature

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Journal of Materials Science & Technology 2021年第15期74卷 143-154页

作者： Baoxian Su Binbin Wang Liangshun Luo Liang Wang Yanqing Su Fuxin Wang Yanjin Xu Baoshuai Han Haiguang Huang Jingjie Guo Hengzhi Fu National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin.150001China department of Materials Application Research AVIC Manufacturing Technology InstituteBeijing100024China School of Materials Science and Engineering.Kunming University of Science and Technology Kunming650093China Yunnan titanium Industry Co. Ltd.Chuxiong651209China

Investigation about the corrosion behavior of Ti alloys in different ambient environment is of great significance for their practical ***,we systematically investigate the corrosion behavior of a newfound Ti-6 Al-3 Nb-2 Zr-1 Mo(Ti80)alloy in hydrochloric acid(HCl)ranging from 1.37 to 7 M,and temperature ranging from 25 to 55℃,by means of electrochemical measurements,static immersion tests and surface *** manifest that increasing either HCl concentration or temperature can accelerate the corrosion of Ti80 alloy via promoting the breakdown of native protective oxide film and then further facilitating the active dissolution of Ti80 *** to potentiodynamic polarization curves,Ti80 alloy displays a spontaneous passive behavior in 1.37 M HCl at 25℃,compared to a typical active-passive behavior under the other *** indicated by cathodic Tafel slope,the rate determining step for cathodic hydrogen evolution reaction is likely the discharge reaction *** apparent activation energies obtained from corrosion current density and maximum anodic current density for Ti80 alloy in 5 M HCl solution are 62.4 and 55.6 kJ mol-1,respectively,which signifies that the rate determining step in the corrosion process of Ti80 alloy is mainly determined by surface-chemical reaction rather than ***,the electrochemical impedance spectroscopy tests demonstrate that a stable and compact oxide film exists in 1.37 M HCl at 25℃,whereas a porous corrosion product film forms under the other ***,the critical HCl concentration at which Ti80 alloy can maintain passivation at 25℃can be determined as a value between 1.37 and 3 ***,the corroded surface morphology characterization reveals that equiaxedαphase is more susceptible to corrosion compared to intergranularβphase due to a lower content of Nb,Mo,and Zr in the former.

关键词： titanium alloys Electrochemical techniques Weight loss Corrosion behavior

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Unraveling the evolution of oxygen vacancies in TiO/Cu and its role in COhydrogenation

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Science China Chemistry 2024年

作者： Ke Wang Fanxing Zhang Ning Cao Ying Bao Mi Yan Keping Yan Pengfei Xie State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare Earths School of Materials Science and Engineering Zhejiang University Institute of Zhejiang University-Quzhou College of Chemical and Biological Engineering Zhejiang University department of Chemistry Western Washington University Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering

The remarkable contribution of oxygen vacancies has been revealed by the operando spectroscopies for methanol synthesis from CO2hydrogeneration on the reducible metal oxide-supported copper catalysts. However, a challenge remains in the intrinsic understanding of the evolution and advantage of oxygen vacancies for methanol synthesis. Here we prepare the TiO2–x/Cu with different oxygen vacancy densities by adjusting the ball-milling frequency. At the optimal condition, a TiO2–x/Cu with more oxygen vacancies delivers an excellent methanol yield of 26.5 mmol g-1h-1at 300 °C with a selectivity of more than 70%. The combined analysis of experimental characterizations and theoretical calculations reveals that the mutual dispersions of TiO2–xand Cu driven by mechanical energy induce the electron rearrangement in the d orbital of the Ti atom and relax the Ti–O binding at the interface, which facilitates the formation of oxygen vacancies that further reduce the barrier of CO2hydrogenation to*HCOO due to higher nucleophilicity of titanium ions.

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Effect of Sputtering Current on Growth and Microstructure for titanium Alloy Coatings onto SiC

Effect of Sputtering Current on Growth and Microstructure fo...

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中国材料大会2012

作者： Hao Huang Mao Wen Minjuan Wang Zhenxi Li Xu Huang Chuan Xie titanium alloys lab.Beijing Institute Of Aeronautical Materials department of Materials Science Jilin university

ISBN: (纸本)9783037856086;3037856084

The influences of sputtering current on deposition rate, composition, microstructure evolution and growth mechanism for titanium alloy coatings onto SiC fibers are explored by surface profiler, auger electron spectrometer, X-ray diffraction, scanning electron microscopy and atomic force microscope. The experimental results show that crystallization take place in all coatings with hexagonal structure （α-Ti）. As sputtering current is increased, deposition rate and Al content increase, and Ti content decreases. Coating growth mode alsotransforms from V-shaped column grains to equiaxed grains as sputtering current increased. The column grains are generally not single grains, and more nano-grains are composed

关键词： Sputtering Current PVD titanium Alloy.

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Evaluation of Particle Properties of MgO/TiO₂ Material by Monte Carlo Simulation Method

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Journal of Materials Science and Chemical Engineering 2024年第2期12卷 49-60页

作者： Koffi N’guessan Placide Gabin Allangba Yves Kily Hervé Fagnidi Hermann N’guessan Zié Traoré Koffi Arnaud Kamenan Physics Pedagogical Unit Laboratory of Environmental Science and Technology University Jean Lorougnon Guédé Daloa C&#244te d’Ivoire Laboratory of Fundamental and Applied Physics University Nangui Abrogoua Abidjan C&#244te d’Ivoire department of Medical Physics University of Trieste and International Centre for Theoretical Physics (ICTP) Trieste Italy department of Science and Technology University Alassane Ouattara Bouaké C&#244te d’Ivoire Nuclear Physics and Radiation Protection Team Laboratory of Material Sciences Environment and Solar Energy University Felix Houphouet-Boigny Abidjan C&#244te d’Ivoire department of Mathematics Physics and Chemistry UFR Biological Sciences University Peleforo Gon Coulibaly Korhogo C&#244te d’Ivoire

The simulation by the Monte Carlo method executed by the software PyPENELOPE proved effective to specify the particle propagation characteristics by calculating the absorption fractions, backscattering and transmission of electrons and secondary photons under the incidence of 0.5 to 20 KeV range of primary electrons. More than 99.9% of the primary electrons were transmitted in the 125 nm thick MgO/TiO2 material at 20 KeV. This occurred because several interactions took place in the transmitted primary irradiation such as characteristic, fluorescence, and bremsstrahlung produced when of the occupation of the KL3, KL2, KM3, and KM2 shell and sub-shell of titanium and magnesium which are the elements with a high atomic number in the material. The transmission particle characteristic of this material is therefore an indicator capable of improving the electrical performance and properties of the sensor.

关键词： Monte Carlo PyPENELOPE Primary Electrons Transmission MgO/TiO2

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