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Hot Compression Mechanical Behavior of Solution Heat‑Treated and Pre‑aged Mg–Zn–Gd–Er Alloys

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Acta Metallurgica Sinica(English Letters) 2023年第3期36卷 469-485页

作者： bo che Liwei Lu Longfei Liu Yan Yang Wei Kang Jun Luo Zhiqiang Wu Yongfeng Qiu School of Materials Science and Engineering Hunan University of Science and TechnologyXiangtan 411201China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Hunan Provincial Key Laboratory of Vehicle Power and Transmission System Hunan Institute of EngineeringXiangtan 411104China Guiyang Aluminum Magnesium Design&Research Institute Co. LtdGuiyang 550081China School of Automation Central South UniversityChangsha 410083China

The mechanical behavior of solution heat-treated and pre-aged Mg–6Zn–1Gd–1Er alloys during hot compression(from 180 to 330℃)has been *** results showed that the flow stress curves of the pre-aged sample(PAS)intersected with that of the solution heat-treated sample(SHTS)during hot *** 180℃,when the true strain is 0.27 and 0.47,the PAS showed larger and smaller stress(210.80 MPa vs.207.58 MPa and 205.67 MPa vs.207.93 MPa)than the SHTS,*** phenomena were due to the stronger interaction of W phase and dislocations/twins under the strain of 0.27,while dynamic recrystallization softening occurred under the strain of *** the temperature increased to 330℃,the flow stress of PAS and SHTS showed an opposite trend to that of 180℃.Continuous dynamic recrystallization and particle stimulated nucleation based on slip operations are the main deformation mechanisms under 330℃.At the true strain is 0.33 and 0.53,the PAS has smaller and larger stress(61.32 MPa vs.63.69 MPa and 58.75 MPa vs.57.09 MPa)than the SHTS,*** increasing deformation resistance of dynamic precipitation improved the flow stress under smaller strain and dynamic recrystallization decreased the flow stress under high strain,which resulted the opposite phenomena of SHTS.

关键词： Mg-6Zn-1Gd-1Er alloy Mechanical behavior Precipitates Twin Dynamic recrystallization

Electrochemical hydrogen storage properties of melt-spun Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy

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Frontiers of physics 2011年第2期6卷 209-213页

作者： Jian WANG Guang-bo che Qing-wei WANG Wan-xi ZHANG Li-min WANG Key Laboratory of Preparation and Applications of Environmental Friendly Materials （Ministry of Education） Jilin Normal University Siping 136000 China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

The Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy samples were synthesized by melt-spinning technique at the different wheel velocity （cooling rate）, and the structure and electrochenfical hydrogen storage properties were investigated. The result indicated that the structure of the melt-spun ribbons mainly contains C14 Laves phase and V-based solid solution phase. The discharge capacity, cyclic stability, high-rate discharge ability and electrochemical kinetic of the alloy electrodes are correlated with the cooling rate （wheel velocity）, and the maximum discharge capacity is over 200 mA.h/g at the wheel velocity of 20 m/s.

关键词： Ti0.9Zr0.1V0.2Ni1.5La0.5 alloy melt-spinning hydrogen storage electrochemical prop-erties

A New Family of Ce6MoO15 as Fast Oxide Ion Conductor

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Journal of Rare Earths 2004年第z2期22卷 95-97页

作者： Feng Jing bo Qibing che Ping Wang Jingping Liu Jianfen Lu Minfeng Zhang Deping Fang Daqing Cao Xueqiang Meng Jian Key Laboratory of Rare Earth chemistry and Physics Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Key Laboratory of Rare Earth Chemistry and PhysicsChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

A novel solid solution Ce6MoO15 was achieved. Their structure and oxide ionic conductivity were *** on Ce6MoO15, rare earth element substitution on cerium site shows that all resulting oxides enhance the conductivity ... 详细信息

关键词： Ce6MoO15 fast oxide ion conductor rare earths

An n–n type heterojunction enabling highly efficient carrier separation in inorganic solar cells

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Chinese Physics B 2022年第3期31卷 60-65页

作者： Gang Li Yuqian Huang Rongfeng Tang bo che Peng Xiao Weitao Lian Changfei Zhu Tao chen Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of Energy Hefei Comprehensive National Science CenterHefei 230026China

Carrier separation in a solar cell usually relies on the p–n junction. Here we show that an n–n type inorganic semiconductor heterojunction is also able to separate the exciton for efficient solar cell applications. The n–n type heterojunction was formed by hydrothermal deposition of Sb_(2)(S,Se)_(3) and thermal evaporation of Sb_(2)Se_(3). We found that the n–n junction is able to enhance the carrier separation by the formation of an electric field, reduce the interfacial recombination and generate optimized band alignment. The device based on this n–n junction shows 2.89% net efficiency improvement to 7.75%when compared with the device consisted of semiconductor absorber–metal contact. The study in the n–n type solar cell is expected to bring about more versatile materials utility, new interfacial engineering strategy and fundamental findings in the photovoltaic energy conversion process.

关键词： n–n junction carrier separation solar cell antimony selenosulfide thin film

Influence of As_2O_3 combined with ginsenosides Rg3 on inhibition of lung cancer NCI-H1299 cells and on subsistence of nude mice bearing hepatoma

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Asian Pacific Journal of Tropical Medicine 2014年第10期7卷 772-775页

作者： Jian-bo che Zhong-Hua Liu Hong-Bing Ma Yong Li Hui Zhao Xiao-Hui Li Wei-Chao Liu Gong-Ning Shi Huaihe River Hospital Henan University

Objective:To study the effect of arsenic trioxide（As2O3）combined with ginsenosides Rg3 on inhibiting the NCI-H1299 lung cancer cells and subsistence in nude mice bearing ***:MTT method was used to measure the inhibition effect of（As2O3）combined Rg3 on NC1-H1299 cells,and the proliferation inhibiting effect was observed via establishing the transplanted tumor model in vitro.A total of 40 tumor-bearing nude mice were randomly divided into normal saline group,（As2O3）,Rg3 and As2O3+Rg3 *** tumor model of lung cancer in nude mice was constructed,followed by injection of certain concentrations of normal saline,As2O3,ginseng saponin Rg3 and As2O3+Rg3 every *** survival duration and the tumors size of the mice were recorded and the Kaplan-Meier curve was made;microscopic observation of apoptosis of tumor cells in vivo was done using TUNEL ***:After 72 h of *** rate of tumor cell in normal saline group,As2O3 ***3 group and As2O3+Rg3 group was（5.66±0.31）%,（65.58±4.75）%,（44.69±3.32）%and（82.67±5.43）%,*** rate of tumor cell in As2O3 ***3 groap and As2O3+Rg3 group was significantly higher than that of normal saline group（P<0.01）;inhibition rate of tumor cells of As2O3+Rg3 group was significantly higher than that of the two groups given As2O3 or Rg3 alone（P<0.01）.The tumor volume of As2O3 group,Rg3 group and As2O3+Rg3 group shrank to（65.38±3.25）%,（77.68±3.43）%and（42.65±3.55）%of the original,tumor volume of saline group was 1.21 times of the original size（P<0.01）;Median survival of saline group,Rg3 group,As2O3 group were significantly shorter than that of As2O3+Rg3 group（P<0.01）;co-ordinated intervention ability of As2O3+Rg3 on NCI-H1299 cell was significantly higher than that of As2O3 or Rg3,***:As2O3 combined with Rg3 can significantly inhibit prolifaration of NCI-H1299 cells in lung cancer,prolong survival fo tumor-bearing nude mice,and promote tumor cell

关键词： As_2O_3 Rg3 Lung cancer Combination therapy

Effect of sevoflurane on tissue permeability of lung ischemia-reperfusion injury in rats

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Asian Pacific Journal of Tropical Medicine 2014年第4期7卷 276-279页

作者： Xiao-Hui Li Zhong-Hua Liu Hong-Bing Ma Yong Li Hui Zhao Jian-bo che Wei-Chao Liu Gong-Ning Shi Huaihe River Hospital Henan University Medical School Henan University

Objective:To investigate the effect of sevoflurane on tissue permeability of lung ischemiareperfusion injury(LIRI)in ***:A total of 45 wistar rats were randomly divided into3 groupsⅠ,Ⅱ,Ⅲ.Modified Eppinger method was adopted to establish the rat lung ischemiareperfusion injury ***Ⅰserved as the control group,groupⅡas ischemia reperfusion group,groupⅢas sevoflurane ischemia-reperfusion *** gas index,lung permeability index(LPI)change,lung tissue pathology change and lung water content were observed and compared between groups of rats at different time ***:During ischemia reperfusion,all rats kept balance of the MAP during different time points,SPO_2 of groupⅡandⅢdecreased significantly thanⅠgroup(P<0.05);after reperfusion lung permeability index in GroupⅡandⅢwas higher than the control group significantly(P<0.05),120 min after reperfusion LPI change and iujury of groupⅢwas significantly lower thanⅡgroup(P<0.05);interstitial and alveolar cavity effusion in of groupⅢwere lower than that of groupⅡ.Conclusions:Sevoflurane pretreatment can reduce the lung tissue permeability,and LIRI plays a protective role in LIRI.

关键词： Sevoflurane Rats Lung ischemia-reperfusion Protection

Dual effect of NH4F additive in the hydrothermal deposition of antimony selenosulfide thin film for high-performance solar cells

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Science China Materials 2022年第12期65卷 3411-3417页

作者： Gang Li Jiabin Dong Peng Xiao bo che Yuqian Huang Yi Zhang Rongfeng Tang Changfei Zhu Tao chen Department of Materials Science and Engineering School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of Photoelectronic Thin Film Devices and Technology and Tianjin Key Laboratory of Thin Film Devices and Technology Nankai UniversityTianjin 300350China

Hydrothermal deposition of antimony selenosulfide(Sb_(2)(S,Se_(3)))has enabled solar cell applications to surpass the 10%efficiency *** deposition process involves the reaction of three precursor materials:Sb,S,and ***,this process generates an unfavourable gradient of Se and S anions in the Sb_(2)(S,Se)_(3)film,which limits further efficiency ***,we demonstrate how NH_(4)F can be used as an additive to regulate the band gradient of the Sb_(2)(S,Se)_(3)and modify the surface of the CdS electron-transporting *** the one hand,NH_(4)F inhibits the decomposition of Na_(2)S_(2)O_(3)and selenourea,which optimizes the deposition process and allows for adjustment of the Se/S ratio and their distribution in the Sb_(2)(S,Se)_(3)*** the other hand,hydrolysis of NH_(4)F induces dissolution and redeposition of CdS,thereby effectively improving the morphology and crystallinity of the CdS ***,the dual effect of NH_(4)F enables improved surface morphology and energy alignment of the Sb_(2)(S,Se)_(3)film,thus yielding a maximum efficiency of 10.28%,a 12%improvement over the control *** study demonstrates an effective strategy for simultaneously modifying a sulfide-based substrate and regulating the element distribution during the deposition of a metal chalcogenide film for optoelectronic device applications.

关键词： antimony selenosulfide Sb_(2)(S,Se)_(3) solar cell NH4F additive element gradient

蛙血清去蛋白提取物对离体大鼠心肌缺血再灌注损伤的保护作用

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医学研究杂志 2013年第11期42卷 137-140页

作者：陈博广东医学院东莞校区生理科学实验室 523808

目的探讨蛙血清去蛋白提取物对离体大鼠心肌缺血再灌注损伤(IRI)的保护作用。方法应用Langendorff恒压灌注大鼠心脏,停灌-复灌方式制备缺血再灌注模型。观察缺血再灌注期间左心室内压上升的最大变化速率(+dp/dt max)、左心室内压下降的... 详细信息

目的探讨蛙血清去蛋白提取物对离体大鼠心肌缺血再灌注损伤(IRI)的保护作用。方法应用Langendorff恒压灌注大鼠心脏,停灌-复灌方式制备缺血再灌注模型。观察缺血再灌注期间左心室内压上升的最大变化速率(+dp/dt max)、左心室内压下降的最大变化速率(-dp/dt max)、左心室收缩压(LVSP)和冠状动脉流量(CF)、采用黄嘌呤氧化酶法测定超氧化物歧化酶(SOD)活性,硫代巴比妥酸法测定丙二醛(MDA)含量。结果蛙血清去蛋白提取物高、中浓度组能显著改善IRI引起的心功能损伤,升高LVSP、CF、+dp/dt max、和-dp/dt max,减少心肌组织中MDA的生成,增加心肌组织中SOD活性。蛙血清去蛋白提取物高浓度组比蛙血清去蛋白提取物中、低浓度组对上述指标的改善更为显著。结论蛙血清去蛋白提取物可改善IRI引起的心脏收缩及舒张功能障碍,增加心肌清除氧自由基的能力且这种保护作用存在量效关系。

关键词：蛙血清去蛋白提取物心肌缺血再灌注损伤

因素计点法在电源开发企业岗位评价体系中的应用

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四川水利 2010年第6期31卷 62-64,72页

作者：车波中水集团四川电力开发有限公司成都610017

岗位评价是薪酬制度设计的基础,因素计点法是岗位评价中最为常见的方法。但在电源开发企业实践中,这种方法的科学性、可靠性经常受到使用者的忽视。本文讨论了该方法在设计使用过程中的三个主要环节:评价要素选取、要素权重的确定和要... 详细信息

岗位评价是薪酬制度设计的基础,因素计点法是岗位评价中最为常见的方法。但在电源开发企业实践中,这种方法的科学性、可靠性经常受到使用者的忽视。本文讨论了该方法在设计使用过程中的三个主要环节:评价要素选取、要素权重的确定和要素分级定义;提出运用系统分析和调查统计方法进行评价要素选择,采用层次分析法来确定要素权重,并用试评价和领导等级概念排序等专家经验方法来修正定性分析。

关键词：因素计点法电源开发企业岗位评价层次分析法