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Oxygen variation in titanium powder and metal injection molding

International Journal of Minerals,Metallurgy and Materials 2024年第12期31卷 2706-2713页

作者： Junping Shen Chang Liu Muhammad Dilawer Hayat Jianan Chen Hanqing Tian fusheng xin Gang Chen Fei Yang Mingli Qin Xuanhui Qu Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China School of Engineering The University of WaikatoHamilton 3216New Zealand Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Beijing 100083China Ningbo Titan Advanced Materials Technology Co. Ltd.Ningbo 315012China

The control of oxygen is paramount in achieving high-performance titanium(Ti)parts by powder metallurgy such as metal in-jection molding(MIM).In this study,we purposely selected the Ti and Ti-6Al-4V powders as the reference materials since these two are the most representative Ti materials in the ***,hydride-dehydride(HDH)Ti powders were pre-oxidized to examine the ef-fect of oxygen variation on the characteristics of oxide layer on the particle surface and its resultant color *** results indicate that the thickness and Ti oxide level(Ti^(0)→Ti^(4+))of the oxide layer on the HDH Ti powders increased as the oxygen content increased,lead-ing to the transition of color appearance from grey,brown to *** work aids in the powder feedstock selection at the initial stage in powder *** addition,the development of oxygen content was comprehensively studied during the MIM process using the gas-atomized(GA)Ti-6Al-4V ***,the oxygen variation in the form of oxide layer,the change of oxygen content in the powders,and the relevant parts were investigated during the processes of kneading,injection,debinding,and *** oxygen vari-ation was mainly concentrated in the sintering stage,and the content increased with the increase of sintering *** variation of oxygen content during the MIM process demonstrates the crucial role of powder feedstock and sintering stage in controlling oxygen *** work provides a piece of valuable information on oxygen detecting,control,and manipulation for the powder and processing in the industry of Ti and its alloys by powder metallurgy.

关键词： titanium alloys oxygen metal injection molding powder metallurgy

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Investigating effects of different components of EZHU on gene expression of cultured HSC-T6 cells

Investigating effects of different components of EZHU on gen...

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第一次全国中西医结合传染病学术会议

作者： Jiang yuan Li zesong Jiang fusheng Deng xin Yao congshun Nie guang Shenzhen Shajing Hospital, Guangdong Shenzhen Yishengtang Biology Enterprise Company Jiang fusheng, Deng xin, Nie guang, Shenzhen Donghu Hospital, Guangdong Pharmacology office of Shenyang Pharmaceutial University

Objective: We constructed an oligonucleotide microarray with 50 probes representing 50 hepatic fibrosis-associated genes. We substituted the HSC-T6 cells for original hepatic stellate cells, aimed to investigate the effects of 4 different components of EZHU (curcuma aramatica oil,curcumol,β-elemence,Curcumin) on the gene expression in cultured activated hepatic stellate cells, and explored the molecular mechanism of anti-hepatic fibrosis for EZHU at gene network level. Methods: We looked up the mRNA sequence of 50 liver fibrosis-related genes such as TGFβ1, PDGF, IL-6, IL-10, HGF, ICAM-1, MIP-2, TGFβRI, TGFβR Ⅱ,PDGFRα,PDGFRβ,TNFαR1,MMP2,TIMP1 from the gene bank,designed oligonucleotide probes by software of designing oligonucleotide *** synthesized oligonucleotides in PE8909DNA synthesizing instrument, and made out oligonucleotide microarray with OGR-04 droping instrument and aldehyded glass chip. Cultured HSC-T6 cells were treated with different concentrations of medicines (colchicine, curcuma aramatica oil,curcumol, β-elemence,curcumin) .According to the experiment of cells toxicity,we took the appropriate concentrations of medicines whose cells livability was higher than 50% as experiment concentrations. We setted up the blank comparison each team in the same time, and gathered the cells at 4 point of 1h, 6h, 12h, 24h, *** distilled total RNA with Trizol reagent according to the operation process,then labeled cDNAs from total RNA with cy3-dUTP and *** labeled cDNAs were hybrided to an oligonucleotide microarray, then we washed the oligonucleotide microarray a few times. Afterwards, we scanned the gene microarray by scanner Genepix 4000B, and analysed the difference of gene expression of HSC-T6 cells with ImaGene 4.2 ***: After HSC-T6 cells were cultured in medium with 6.25μg/ml of colchicine for 12h, gene expression of TIMP-1 was down-regulated 2.2 bolds,TIMP-2 and IL-6 were down-regulated 2.3, 2.0 bolds, respectively, aft

关键词： DNA microarray curcuma aramatica oil Curcumol Hepatic stellate cells Hepatic fibrosis

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电子计算机在热处理中的应用

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金属热处理 1984年第5期 11-16页

作者：辛富生许宝兴电子工业部工艺研究所

本文评述了电子计算机特别是微处理机在热处理中的应用,介绍了热处理过程中直接工艺参数控制和工艺过程最优化控制的原理、建立最优化控制用数学模型的步骤,以及计算机对热处理生产过程的整体控制和多重控制。作者以微处理机控制高频淬... 详细信息

本文评述了电子计算机特别是微处理机在热处理中的应用,介绍了热处理过程中直接工艺参数控制和工艺过程最优化控制的原理、建立最优化控制用数学模型的步骤,以及计算机对热处理生产过程的整体控制和多重控制。作者以微处理机控制高频淬火系统和可控气氛炉的整体控制为例,说明了某些控制系统的组成与其优点。

关键词：高频淬火微处理机整体控制可控气氛炉计算机感应热处理碳势控制炉气碳势

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腰椎间盘突出症合并腰椎管狭窄的手术治疗

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航空航天医药 2008年第3期19卷 159-160页

作者：程兆佳辛福生南昌334医院江西仁济医院骨科 330024

目的:腰椎间盘突出症为一骨科常见多发病,合并椎管狭窄时如未加注意,手术时只切除突出的椎间盘而不行椎管或神经根管减压,将导致手术后患者症状改善不全甚至手术失败加手术前能仔细检查病人,并通过影像学特别是CT及MRI检查使患者的症状... 详细信息

目的:腰椎间盘突出症为一骨科常见多发病,合并椎管狭窄时如未加注意,手术时只切除突出的椎间盘而不行椎管或神经根管减压,将导致手术后患者症状改善不全甚至手术失败加手术前能仔细检查病人,并通过影像学特别是CT及MRI检查使患者的症状、体征与影像学检查相符合,才不至于漏诊,以提高手术成功率。结果:所介绍病例经术前认真检查定位,手术前后定位与影像学检查基本相符,经3-6年随诊,无1例复发。此外,手术所致腰椎不稳定因素也应加以考虑。

关键词：腰椎间盘突出症椎管狭窄神经根管 CTM MRI

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3D atomic-scale growth characteristics of {10-12} twin in magnesium

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Journal of Magnesium and Alloys 2019年第3期7卷 474-486页

作者： xin Wan Jing Zhang Xueyan Mo fusheng Pan College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing 400044China

In this work,we carried out three-dimensional(3D)atomic-scale study on the growth characteristics of{10-12}twin in magnesium(Mg).The study was performed by MD simulations on Mg single crystals with an initial twin nucleus structures.A detailed atomistic analysis reveals that a stabilized 3D{10-12}twin nucleus is bounded by basal/prismatic(BP)interfaces,prismatic/basal(PB)interfaces,and{10-11}***,a{10-12}twin boundary(TB)occurs at the junction of the BP and PB interface with the growth of the twin *** this process,two twinning mechanisms are involved:a pure-shuffle mechanism in which{10-11}interface migration along the[11-20]direction is mediated by atomic shuffle,and a glide-shuffle mechanism in which BP/PB and{10-12}TB movements are realized by the migration of disconnections along the relevant *** addition,we systematically investigate the stress state associated with the activation of twinning,aiming to discover the intrinsic relationship of the elastic stress field to twin growth on an atomic *** results suggest that the elastic stress in the matrix is an important driving force for twin growth,much similar to what stress does for a *** addition,it is rather remarkable that the{10-11}interface has a greater ability to migrate than other interfaces,and this is thought to be a main factor for the rapid growth of a{10-12}twin.

关键词： Molecular dynamics {10-12}twinning 3D growth Twin-related interfaces

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Study of K^+ doping on structure and properties of γ-Ce_2S_3

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Journal of Rare Earths 2020年第7期38卷 776-783,I0004页

作者： xin Li Yueming Li fusheng Song Zhumei Wang Yan Hong Zhike Li School of Materials Science and Engineering Jingdezhen Ceramic InstituteJingdezhen 333403China National Light Industry Key Laboratory of Functional Ceramic Materials Jingdezhen 333403China Energy Storage and Conversion Ceramic Materials Engineering Laboratory of Jiangxi Province Jingdezhen 333403China

In this study,K+-doped γ-Ce2 S3 was successfully prepared via a gas-solid reaction method using CeO2,K2 CO3,and CS2 as raw *** effects of the suitable sulfide system and different molar ratios of K to Ce(nK/Ce=0-0.30) on the phase composition,crystal structure,chromaticity and thermal stability ofγ-Ce2 S3 were systematically *** γ-Ce2 S3 was obtained by calcining the doped samples at840℃ for 150 *** calcination at the same temperature the undoped K+samples exhibit a pure α-*** with a K/Ce molar ratio(nK/Ce) of 0.10-0.25 comprise only the γ-phase;and when nK/Ce exceeds 0.25,a new heterogeneous phase,KCeS2,*** values of nK/Ce in the range of0-0.25,the γ-Ce2 S3 lattice parameters gradually increases with increasing K+ *** nK/Ceexceedes 0.25,the lattice parameters remains *** nK/Ce increased,the synthesized color gradually changes from red to orange—red and finally,to *** redness value a* reaches the maximum(L*=33.86,a*=36.68,b*=38.15) when nK/Ce=0.10,The nK/Ce=0.10 composition continues to exhibit the y-phase after heat treatment at 420℃ for 10 min in *** K+doping fills the internal vacancies of γ-Ce2 S3 and formed a solid solution,which is beneficial for the stability of its lattice,thus improving the thermal stability of γ-Ce2 S3(from 350 to 420℃).

关键词： γ-Ce2S3 Crystal structure Chromaticity Thermal stability Potassium ion doping Rare earths

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Flexible nanocomposite electrodes with optimized hybrid structure for improved low-grade heat harvest via thermocells

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Science China Chemistry 2023年第6期66卷 1814-1823页

作者： Ziwei Mo Jiaqian Zhou xin Lu Lirong Liang fusheng Liu Zhuoxin Liu Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

Thermal energy is ubiquitous and constantly generated in nature and ***(TECs)represent a promising energyconversion technology that can directly translate thermal energy into electricity with a large thermopower,thus having attracted considerable attention in recent ***,the use of noble platinum electrodes in TECs has substantially limited their widespread applications,as the scarcity of platinum element increases the cost of materials,and its intrinsic rigidity is not conducive to flexible and wearable applications under heat sources with complex surface ***,we propose a facile hybridizing route to constructing flexible electrodes with optimized *** flexible composite electrode is fabricated by decorating a single-walled carbon nanotube network with conducting polypyrrole nanospheres through controlled electrochemical *** refined interfacial nanostructures,the resultant composite film can facilitate carrier transport/transfer at the electrolyte-electrode interface,and thereby shows superior overall thermoelectrochemical performance to noble platinum *** TEC employing the flexible composite electrodes yields a maximum output power of 2.555μW under the temperature difference of 30 K,and a device comprising 6 TEC units is assembled to efficiently utilize waste heat and human body heat,revealing the high potential of low-grade heat harvesting.

关键词： nanocomposites thermocells carbon nanotubes polymers

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Origin of Tafoni in the Late Cretaceous Aeolian Sandstones,Danxiashan UNESCO Global Geopark,South China

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Acta Geologica Sinica(English Edition) 2019年第2期93卷 451-463页

作者： CHEN Liuqin GUO fusheng LIU Fujun XU Huan DING Ting LIU xin State Key Laboratory of Nuclear Resources and Environment East China University of Technology Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral Shandong University of Science and Technology School of Earth Sciences East China University of Technology

Tafoni occur generally in granular rocks around the world, but their origin remains controversial. In this study,the roles of lithology, micro–climate, and organism in tafoni development are investigated in the Danxiashan UNESCO Global Geopark of South China. The Jinshiyan Temple and Luyitang sites along the Jinjiang River are chosen to conduct tafoni morphometry, bedrock petrography, and micro–climate analyses. The research methods used in this study include field observations and measurements, Voronoi diagrams, polarizing microscopic and scanning electron microscopic(SEM)image analysis, and meteorological detection. The tafoni are mostly 2–10 cm in length and elliptical in shape. The Late Cretaceous Jinshiyan sandstones are characterized by a grain–to–grain contact fabric and moderate sorting with a high proportion of soluble grains and cements. The Voronoi diagrams developed through the Arc GIS software are largely consistent with the tafoni openings. Moreover, owing to exposure to solar insolation, the external temperature values are higher than the internal ones, while the external relative humidity values are lower than the internal ones. Therefore, the permeable Jinshiyan sandstones are fundamental for tafoni development, while the abundant moisture from the Jinjiang River and frequent rains is favorable for salt weathering in tandem with biological activities. At last, a five–stage development model is proposed for the tafoni progression in the study area.

关键词： tafoni aeolian sandstone salt weathering moisture Danxia landscape

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A non-nucleophilic electrolyte based on all-inorganic salts with conditioning-free characteristic for rechargeable magnesium batteries

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Journal of Magnesium and Alloys 2024年第8期12卷 3357-3369页

作者： Jiaxin Wen Jingdong Yang Xueting Huang xin Zhang Guangsheng Huang Jingfeng Wang Lingjie Li fusheng Pan Chongqing Industry Polytechnic College Chongqing 401120PR China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044PR China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044PR China

Conditioning-free electrolytes with high reversibility of Mg plating/stripping are of vital importance for the commercialization of the superior rechargeable magnesium batteries(RMBs).In the present work,a non-nucleophilic electrolyte(denoted as MLCH)based on all-inorganic salts of MgCl_(2),LiCl and CrCl_(3) for RMBs is prepared by a straightforward one-step *** a result,the MLCH electrolyte shows the noticeable performance of high ionic conductivity(3.40 mS cm^(−1)),low overpotential(∼46 mV vs Mg/Mg^(2+)),high Coulombic efficiency(∼93%),high anodic stability(SS,∼2.56 V vs Mg/Mg^(2+))and long-term(more than 500 h)cycling stability,especially the conditioning-free *** main equilibrium species in the MLCH electrolyte are confirmed to be the tetracoordinated anions of[LiCl2(THF)2]−and solvated dimers of[Mg_(2)(μ-Cl)3(THF)6]+.The addition of LiCl can assist the dissolution of MgCl_(2) and activation of the electrode/electrolyte interface,resulting in a superior Mg plating/stripping *** synergistic effect of LiCl,CrCl_(3),a small amount of HpMS and the absence of polymerization THF enable the conditioning-free characteristic of the MLCH ***,the MLCH electrolyte exhibits decent compatibility with the cathodic materials of *** Mg/CuS full cell using the MLCH electrolyte presents a discharge specific capacity of 215 mAh g^(−1)at 0.1 C and the capacity can retain∼72%after 40 ***,the MLCH electrolyte has other superiorities such as the broad sources of materials,low-cost and easy-preparation,leading to the potential prospect of commercial application.

关键词： Rechargeable magnesium batteries Non-nucleophilic electrolyte All-inorganic salt Conditioning-free Mg plating/stripping

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Design and analysis of a whole-body controller for a velocity controlled robot mobile manipulator

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Science China(Information Sciences) 2020年第7期63卷 98-112页

作者： Mantian LI Zeguo YANG fusheng ZHA xin WANG Pengfei WANG Ping LI Qinyuan REN Fei CHEN State Key Laboratory of Robotics and Systems Harbin Institute of Technology Shenzhen Academy of Aerospace Technology Key Laboratory of Industrial Control Technology Zhejiang University

Mobile manipulators, which are intrinsically redundant when the manipulator and mobile base are moving together, are known for their capabilities to carry out multiple tasks at the same time. This paper presents a whole-body control framework, inspired by legged bio-robots, for a velocity controlled non-holonomic mobile manipulator based on task priority. Control primitives, such as manipulability optimization, trajectory tracking of the end-effector and mobile base, and collision avoidance, are considered in the framework and arranged at different priorities. Lower priority tasks are projected into the null space of control tasks with higher priorities. As a result, lower level tasks are completed without affecting the performance of higher priority tasks. Several experiments are implemented to verify the effectiveness of the proposed controller. The proposed method is proved to be an effective way to solve the whole-body control problem of velocity controlled mobile manipulators.

关键词： mobile manipulator whole-body control velocity controlled task priority null-space projection

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