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Improved Corrosion Resistance of Selective Laser Melted Ti–5Cu Alloy Using Atomized Ti–5Cu Powder

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Acta Metallurgica Sinica(English Letters) 2019年第8期32卷 1007-1014页

作者： Ying Han hong-rui wang Yun-Dong Cao Wen-Tao Hou Shu-Jun Li School of Electrical Engineering Shenyang University of TechnologyShenyang 110870China Titanium Alloy Laboratory Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The different types of metal powder used for selective laser melting(SLM) process would cause distinct corrosion behavior due to the uniformity of the obtained *** SLM-produced Ti–5Cu alloy using atomized Ti–5Cu metal powder(SLMed Ti–5Cu) in this work reveals a relatively uniform microstructure with overwhelming acicular α/α′ phase and shows great advantages on corrosion resistance compared with the SLM-produced Ti–5Cu alloy using the mixture powder(SLMedM Ti–5Cu).The effect of the micro-galvanic cells decreases due to the undetectable Ti2Cu phase in the microstructure of the SLMed Ti–*** apparent passivation behavior was observed for SLMed Ti–5Cu instead of severe pitting phenomenon for the SLMed-M Ti–*** charge transfer resistance of SLMed Ti–5Cu in this work is 10.09 ± 2.63 MΩ cm2, which is significantly higher than that of SLMed-M Ti–5Cu(4.76 MΩ cm2).The above result indicates the atomized Ti–5Cu powder plays an important role in the formation of the uniform microstructure of SLMed product, thereby enhancing its corrosion resistance in Hank’s solution at 37 ℃.

关键词： Selective laser melting Corrosion behavior Uniform microstructure Ti-5Cu Passivation Polarization resistance

Application of optical proximity correction technology

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Science in China(Series F) 2008年第2期51卷 213-224页

作者： CAI YiCi ZHOU Qiang hong XianLong SHI rui wang Yang Department of Computer Science and Technology Tsinghua University Beijing 100084 China

As process technology scales down to very deep sub-micron （VDSM） in semiconductor manufacturing technology, intrinsic size becomes close to or even shorter than the wavelength used for optical lithography. Thus, some distortions and deformations are introduced by optical proximity effects （OPE） mainly caused by the diffraction and interference of exposure light when layout patterns on a mask are transcribed to a wafer, which influence on the yield and performance of IC circuit. In order to compensate for the deformations, optical proximity correction （OPC） is the most commonly used methodology. Presently, the OPC method is to use a unitary toleration on the whole chip layer, which makes the run time of OPC algorithm longer, causes the size of GDSII files to follow exponential growth, and results in the cost of making mask grow immensely. Firstly, this paper proposes a selfadaptation OPC method with preprocessing function of patterns classification. According to the need of the correction precision, the OPC system divides patterns corrected into two groups with different toleration： critical patterns and general patterns, which enhance the efficiency of the OPC approach. Secondly, a model-based OPC method is presented based on pattern subsection and classifi- cation, which keeps the precision of the correction as well as enhances the efficiency. We also propose a rule-based OPC method with general, concise and complete correction rules, and achieve automatic-built rules-based and its looking-up. Thirdly, we also implement an OPC system, called MR-OPC; the MR-OPC system integrates both rule-based OPC and model-based OPC into a whole, so it can solve the confliction between the efficiency and precision. Experimental results show that the MR-OPC system we suggested has advantages of the efficiency and expansibility.

关键词： OPC rules-based model-based layout IC

Computational model investigating the effect of magnetic field on neural–astrocyte microcircuit

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Chinese Physics B 2021年第6期30卷 711-720页

作者： Li-Cong Li Jin Zhou hong-Ji Sun Peng Xiong hong-rui wang Xiu-Ling Liu Chang-Yong wang College of Physics Science and Technology Hebei UniversityBaoding 071002China Key Laboratory of Digital Medical Engineering of Hebei Province Hebei UniversityBaoding 071002China Department of Neural Engineering and Biological Interdisciplinary Studies Institute of Military Cognition and Brain SciencesAcademy of Military Medical SciencesBeijing 100850China Brainnetome Center Institute of AutomationChinese Academy of SciencesBeijing 100190China

Extremely low-frequency magnetic field is widely used as a noninvasive stimulation method in clinical practice and basic research. Electrical field induced from magnetic pulse can decrease or increase neuronal electrical activity. However, the cellular mechanism underlying the effects of magnetic field is not clear from experimental data. Recent studies have demonstrated that "non-neuronal" cells, especially astrocytes, may be the potential effector for transcranial magnetic stimulation(TMS). In the present study, we implemented a neural–astrocyte microcircuit computational model based on hippocampal architecture to investigate the biological effects of different magnetic field frequencies on cells. The purpose of the present study is to elucidate the main influencing factors of MS to allow a better understanding of its *** model reproduced the basic characteristics of the neuron and astrocyte response to different magnetic stimulation. The results predict that interneurons with lower firing thresholds were more active in magnetic fields by contrast to pyramidal neurons. And the synaptic coupling strength between the connected neurons may be one of the critical factor to affect the effect of magnetic field on cells. In addition, the simulations show that astrocytes can decrease or increase slow inward currents(SICs) to finely tune neuronal excitation, which suggests their key role in excitatory–inhibitory balance. The interaction between neurons and astrocytes may represent a novel target for effective therapeutic strategies involving magnetic stimulation.

关键词： magnetic stimulation neural–astrocyte microcircuit excitatory and inhibitory balance computational model

Analysis of risk factors for postoperative deep vein thrombosis after craniotomy and nomogram model construction

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World Journal of Clinical Cases 2023年第31期11卷 7543-7552页

作者： Zhen-Jin Su hong-rui wang Li-Qin Liu Nan Li Xin-Yu hong Department of Neurosurgery The First Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Operating Theater The First Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Deep vein thrombosis(DVT)of the lower extremity is one of the most common postoperative complications,especially after craniocerebral *** may lead to pulmonary embolism,which has a devastating impact on patient *** study aimed to investigate the incidence and risk factors of DVT in the lower limbs following craniocerebral *** To identify independent risk factors for the development of postoperative DVT and to develop an effective risk prediction *** The demographic and clinical data of 283 patients who underwent craniocerebral surgery between December 2021 and December 2022 were retrospectively *** independent risk factors for lower extremity DVT were identified by univariate and multivariate analyses.A nomogram was created to predict the likelihood of lower extremity DVT in patients who had undergone craniocerebral *** efficacy of the prediction model was determined by receiver operating characteristic curve using the probability of lower extremity DVT for each *** Among all patients included in the analysis,47.7%developed lower extremity DVT following craniocerebral *** risk of postoperative DVT was higher in those with a longer operative time,and patients with intraoperative intermittent pneumatic compression were less likely to develop postoperative *** The incidence of lower extremity DVT following craniocerebral surgery is significant,highlighting the importance of identifying independent risk *** such as the use of intermittent pneumatic compression during surgery may prevent the formation of postoperative DVT.

关键词： Deep vein thrombosis Craniotomy surgery Risk factors Nomogram

Synthesis and characterization of novel polypropylene paper releasing anion

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Chinese Chemical Letters 2009年第4期20卷 483-486页

作者： Li Qiu wang Qing Shan Li Hui Peng Ma Xiao Feng Guo rui hong wang Gang Yao College of Environmental and Chemical Engineering State Key Laboratory of Metastable Materials Science and Technology Yanshan University State Key Laboratory of Metastable Materials Science and Technology Qinhuangdao 066004 China

Polypropylene synthetic paper releasing anion was prepared from polypropylene resin, anion additives, titanium dioxide, etc., by calendar forming method. The synthetic paper was tested by anion detector, SEM, AFM, etc. Tensile strength, elongation at break, fight angle tear strength of the polypropylene synthetic paper reached the GB 13022 or QB/T1130 Standard. The synthetic paper was water and oil resistance, and released anions 10,530 cm^-3. It was environment-friendly, and a kind of good material for human＇s health.

关键词： Synthetic paper Polypropylene Functional polymer Health material Anions releasing

A theoretical study of the effect and mechanism of FeN_(3)-doped biochar for greenhouse gas mitigation

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Biochar 2023年第1期5卷 409-418页

作者： hong-rui wang Wen-Tao Zhou rui Xiong Kang-Yu Zhong Jing He Xin Ma Qing Wu Pan Long Zhi-Qiang Fu College of Agronomy Hunan Agricultural UniversityChangsha 410128People’s Republic of China College of Chemistry and Chemical Engineering Information and Network CenterCentral South UniversityChangsha 410083China

Paddy fields are a major emission source of greenhouse gases(GHGs)[for instance,methane(CH_(4)),nitrous oxide(N_(2)O),and carbon dioxide(CO_(2))]among agricultural *** has been deemed a potential candidate for the reduction of GHGs in paddy ***,there is no consistent conclusion that biochar can simultaneously reduce emissions of CH_(4),N_(2)O,and CO_(2).Herein,we proposed the FeN_(3)-doped biochar(FG)as an excellent material for GHGs restriction in paddy fields via the first-principles *** computation results indicated that the FG exhibited satisfactory adsorption ability for CH_(4),CO_(2),and N_(2)O,which improved the adsorption energies to−1.37,−1.54,and−2.91 eV,***,the density of state(DOS)analyses revealed that the factor responsible for FeN_(3)-doped biochar to exhibit excellent adsorption ability was the occurrence of drastic energy up-or down-shift of the electron for Fe d,C p,O p,or N p orbital upon adsorption of CH_(4),CO_(2),or N_(2)*** study suggested an advanced modified biochar material for reducing the GHGs emissions in paddy fields,in addition to exploring the adsorption properties and mechanisms of FeN_(3)-doped biochar for GHGs mitigation,which provided a strategy to explore biochar modification and efficient emission reduction materials.

关键词： Modified biochar Fe atoms sorbent Greenhouse gas First-principles calculation Adsorption mechanism

Synthesis and Characterization of Carborane Bisphenol Resol Phenolic Resins with Ultrahigh Char Yield

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Chinese Journal of Polymer Science 2015年第11期33卷 1606-1617页

作者： Shi-cheng Qi Guo Han hong-rui wang Ning Li 张孝阿 Sheng-ling Jiang Ya-fei Lu College of Materials Science and Engineering Key Laboratory of Carbon Fiber and Functional Polymers of Ministry of Education Beijing University of Chemical Technology

Two carborane-containing resol phenolic resins（P1 and P2） with high boron content were synthesized via the reaction of carborane bisphenols（1 and 2） with formaldehyde in the presence of alkaline. HRMS results indicate that P1 is mainly composed of hydroxymethylated o-carborane bisphenols, the Mw of which was restrained around 500 due to the strong steric hindrance of o-carborane bisphenol. In contrast, the molecular weight of P2 was well regulated under various reaction conditions. The obtained resins were characterized with spectroscopic techniques including FTIR, 1H-NMR, ^13C-NMR, and 11B-NMR, which gave satisfactory results. TGA studies show that P2 shows char yield of 88.9% and 92.9% at 900 ℃ under nitrogen and air respectively. The imported carborane cage endows phenolic resin with ultrahigh char yield. Particularly, the char yield of the obtained carborane-containing phenolic resin under air is higher than that under nitrogen. FTIR and XRD confirm that the carborane cage could react with oxygen to form B2O3 at elevated temperatures, which postpones the thermal decomposition of phenolic resin and accounts for the high char yield.

关键词： Carborane-containing resol phenolic resin High boron content Char yield

Bifunctional sulfonated covalent polymers as the modulator for oriented and highly reversible zinc plating

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Science China Chemistry 2023年第1期66卷 289-296页

作者： Meng-Jie Chen Qing-Yuan Zhao hong-rui wang Tao Long Xin Ma Qing Wu Wen-Xin Zhou Xiong-Wei Wu Xian-Xiang Zeng School of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Efficient and Clean Utilization of ManganeseResourcesCentral South UniversityChangsha 410083China Information and Network Center Central South UniversityChangsha 410083China

The vast superiority in resource sustainability and volumetric energy density enables metallic zinc(Zn)to construct costeffective and environment-benign battery systems for the energy ***,the problems of Zn dendrites and poor Coulombic efficiency(CE)during cell’s whole life cycle stump its advancement as a rechargeable battery *** solution is to modulate the Zn^(2+) desolvation prior to electro-reduction and subsequent ***,a transferred protection tactic via a bifunctional sulfonated covalent polymer interlayer is proposed to regulate the Zn2+desolvation,which affects the formation of solid-electrolyte interphase,and guides its plating along with preferable(002)crystal ***,the high initial CE of 96.3%and the long-term average CE of 99.8%for 310 cycles are achieved in Zn||Cu cells and 570-h circulation is also realized at 2 mA cm^(-2)/10 mAh cm^(-2)in Zn||Zn ***,Zn||hydrated vanadium oxide-based full batteries with the low-concentration organic electrolytes are also demonstrated with the high specific capacity of 173.8 mAh g^(-1)at 0.5 A g^(-1)and 64%capacity retention over 305 cycles and oriented Zn deposition.

关键词： Zn anode interface chemistry sulfonated covalent polymer oriented plating reversibility

Layered oxide cathodes for sodium-ion batteries: From air stability, interface chemistry to phase transition

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InfoMat 2023年第6期5卷 1-43页

作者： Yi-Feng Liu Kai Han Dan-Ni Peng Ling-Yi Kong Yu Su hong-Wei Li Hai-Yan Hu Jia-Yang Li hong-rui wang Zhi-Qiang Fu Qiang Ma Yan-Fang Zhu rui-Ren Tang Shu-Lei Chou Yao Xiao Xiong-Wei Wu College of Chemistry and Chemical Engineering Central South UniversityChangshathe People's Republic of China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhouthe People's Republic of China College of Agronomy School of Chemistry and Materials ScienceHunan Agricultural UniversityChangshathe People's Republic of China Wenzhou Key Laboratory of Sodium-Ion Batteries Wenzhou University Technology Innovation Institute for Carbon NeutralizationWenzhouthe People's Republic of China College of Electrical and Information Engineering Hunan UniversityChangshathe People's Republic of China Hunan Province Yin Feng New Energy Co.Ltd Changshathe People's Republic of China

Sodium-ion batteries(SIBs)are considered as a low-cost complementary or alternative system to prestigious lithium-ion batteries(LIBs)because of their similar working principle to LIBs,cost-effectiveness,and sustainable availability of sodium resources,especially in large-scale energy storage systems(EESs).Among various cathode candidates for SIBs,Na-based layered transition metal oxides have received extensive attention for their relatively large specific capacity,high operating potential,facile synthesis,and environmental ***,there are a series of fatal issues in terms of poor air stability,unstable cathode/electrolyte interphase,and irreversible phase transition that lead to unsatisfactory battery performance from the perspective of preparation to application,outside to inside of layered oxide cathodes,which severely limit their practical *** work is meant to review these critical problems associated with layered oxide cathodes to understand their fundamental roots and degradation mechanisms,and to provide a comprehensive summary of mainstream modification strategies including chemical substitution,surface modification,structure modulation,and so forth,concentrating on how to improve air stability,reduce interfacial side reaction,and suppress phase transition for realizing high structural reversibility,fast Na+kinetics,and superior comprehensive electrochemical *** advantages and disadvantages of different strategies are discussed,and insights into future challenges and opportunities for layered oxide cathodes are also presented.

关键词： air stability interface chemistry layered oxide cathodes phase transition sodium-ion batteries