检索结果-南通市图书馆

Microstructural evolution and thermal fatigue damage mechanism of second-phase dispersion strengthened tungsten composites under repetitive thermal loads

引用

Journal of Materials Science & Technology 2023年第9期140卷 221-232页

作者： Hui Wang Zhuoming Xie Xiang Cheng Ke Jing Linchao Zhang junfeng yang Rui Liu Le Han Lei Cao Xianping Wang Qianfeng Fang Changsong Liu Xuebang Wu Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

In a fusion reactor,plasma-facing tungsten(W)materials inevitably suffer severe thermal shock,and the performance of W materials under repetitive high heat loads is one of the key concerns for long-term stable operation of the *** this work,the microstructural evolution and thermal fatigue resistance of two representative W-0.5 wt.%ZrC(WZC)and W-1.0 wt.% Y_(2)O_(3)(WYO)composites were investigated under cyclic heat *** to the intrinsic properties of ZrC and Y_(2)O_(3)particles such as coefficients of thermal expansion,particle size and distributions in W grains,the WZC composite exhibited a better thermal shock resistance than *** thermal loads with the absorbed power density(APD)≥22 MW/m^(2),WYO showed obvious grain growth,Y_(2)O_(3)particles shedding and degradation of mechanical ***,in the case of WZC,these damage behaviors only occurred when APD≥25 MW/m^(2).Furthermore,an interesting crack mechanism in W composites was revealed due to interface debonding and progressive shedding of second-phase particles from the W *** microstructures and tensile properties of the thermally loaded WZC and WYO specimens were also investigated and the correlations between the microstructure evolution and performance degradation are *** results are useful for evaluating the thermal fatigue resistance of oxide/carbide dispersion strengthened W composites and their application in future fusion reactors.

关键词： Tungsten Thermal loads Microstructure Particle shedding Mechanical properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microstructures and Properties of Biomedical Mg-Zn-Sn-Zr Rolled Alloys

引用

Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 766-773页

作者：周生刚 ZHANG Daxin XU yang DUAN Jihao LI Tao LIU junfeng WANG Peng 曹勇 Faculty of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093China

The as-cast Mg-2.0Zn-1.5Sn-xZr(x=0,0.4,0.6,0.8,1.0 wt%)alloy was rolled with the pressure less than 5%each *** microstructure,mechanical properties,corrosion properties and biocompatibility of the alloy were *** microstructure of the alloy was observed and analyzed by scanning electron microscope,and the tensile test was carried out by universal tensile *** corrosion resistance of the alloy in Hank's solution was studied by hydrogen evolution experiment and electrochemical test,and the biocompatibility of the alloy was tested by L929 *** results show that Mg-2Zn-1.5Sn-xZr alloy has excellent mechanical *** elongation of Mg-2Zn-1.5Sn-xZr alloy decreases with the increase of Zr content,but the tensile strength first increases and then decreases with the increase of Zr *** the Zr content is 0.8 wt%,the maximum tensile strength of the alloy is 235 *** results of hydrogen evolution experiment and electrochemical analysis show that the corrosion resistance of the alloy is the best when the Zr content is 0.8 wt%,and all the five alloys have high *** conclusion,the rolled alloy has good properties and has broad application prospects in the field of biomaterials.

关键词： magnesium alloy corrosion performance mechanical properties biocompatibility

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

聚丙烯-石英砂-石墨三元复合材料的制备及性能研究

引用

科技资讯 2024年第2期22卷 103-106页

作者：李永强许圣业郝跃刘迪姜玉恒杨俊峰国能新疆准东能源有限责任公司新疆昌吉831799 河北圣业机械制造有限公司河北沧州061300 中科院固体所安徽合肥230031

以二氧化硅(SiO_(2))和石墨(Graphite)为填料,聚丙烯(PP)为基体,通过机械球磨混合,高温加热成浆料,模压成型制备了聚丙烯-二氧化硅-石墨三元复合材料(PSG),并对复合材料的抗压强度和表面电阻率进行了测试,研究了石英砂和石墨的含量对PS... 详细信息

以二氧化硅(SiO_(2))和石墨(Graphite)为填料,聚丙烯(PP)为基体,通过机械球磨混合,高温加热成浆料,模压成型制备了聚丙烯-二氧化硅-石墨三元复合材料(PSG),并对复合材料的抗压强度和表面电阻率进行了测试,研究了石英砂和石墨的含量对PSG性能的影响。研究结果表明:石墨的添加可以提高PSG的电导率,当石墨含量达到14%时,PSG的表面电阻率为1.9×10^(8)Ω,具有抗静电性能;随着石英砂的添加,PSG的抗压强度表现为先增加后减少的变化规律,当石英砂的含量为65 wt%时,PSG的抗压强度达到最大值73 MPa,与聚丙烯-石墨复合材料相比提高了1.3倍。

关键词：聚丙烯二氧化硅石墨复合材料

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

动脉瘤性蛛网膜下腔出血患者血清和脑脊液LCN2早期表达分析

引用

包头医学院学报 2024年第7期40卷 48-52页

作者：赵丽英赵世君耿尚勇赵新惠杨俊峰菅文慧包头医学院研究生院内蒙古包头014040 包头医学院第三附属医院包头市中心医院神经内科

目的:分析动脉瘤性蛛网膜下腔出血(aneurysmal subarachnoid hemorrhage,aSAH)患者血清和脑脊液载脂蛋白2(lipocalin-2,LCN2)早期表达情况,探讨其与患者早期脑损伤(early brain injury,EBI)严重程度的相关性。方法:选择2020-2022年入住包头市中心医院神经内科诊断为aSAH且发病3 d内的患者为aSAH组;选取同期与患者年龄、性别相匹配的其他患者为对照组。采用酶联免疫吸附法测定两组血清和脑脊液LCN2水平。运用Hunt-Hess分级评定患者脑损伤严重程度并分为3组:Ⅰ组Hunt-HessⅠ级、Ⅱ组Hunt-HessⅡ级、Ⅲ组Hunt-HessⅢ-Ⅴ级,分析EBI严重程度与血清和脑脊液LCN2水平的相关性。结果:共入组47例患者。(1)aSAH组血清和脑脊液LCN2水平均高于对照组,差异有统计学意义(P0,P<0.05)。(3)通过绘制ROC曲线表明:血清LCN2的ROC曲线下面积为0.876(特异度为100.00%,敏感度为61.70%),最佳诊断界限值为45.68 ng/mL;脑脊液LCN2的ROC曲线下面积为0.914(特异度为76.60%,敏感度为100.00%),最佳诊断界限值为15.08 ng/mL。结论:aSAH患者早期体液LCN2明显升高,并与EBI密切相关,可能参与EBI发病机制。

关键词：动脉瘤性蛛网膜下腔出血 LCN2 早期脑损伤

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Covalently bonded ternary photocatalyst comprising MoSe_(2)/black phosphorus nanosheet/graphitic carbon nitride for efficient moxifloxacin degradation

引用

Chinese Chemical Letters 2024年第9期35卷 356-359页

作者： Yuhao Ma Yufei Zhou Mingchuan Yu Cheng Fang Shaoxia yang junfeng Niu College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China College of Water Conservancy and Hydropower Engineering North China Electric Power UniversityBeijing 102206China Global Centre for Environmental Remediation(GCER) University of NewcastleCallaghanNSW 2308Australia

Covalently bonded bridging between different semiconductors is a remarkable approach to improve the transfer of charge carriers at *** this study,we designed a ternary heterojunction(MBG)combining of molybdenum diselenide(Mo Se_(2)),black phosphorus nanosheets(Bpn)and graphitic carbon nitride(GCN).Among this MBG of Mo Se_(2)/Bpn/GCN,(i)the covalently bonded bridging effect between Bpn/GCN facilitates directional charge carrier transfer,meanwhile(ii)a Z-scheme heterojunction is formed between Mo Se_(2)/GCN to enhance the separation of photogenerated ***,(iii)this composite exhibits an increased absorption for visible *** this MBG,photocatalytic degradation of over 98%of moxifloxacin is achieved within 20 min,with O_(2)·-confirmed as the primary photocatalytic active *** findings provide novel insights into the construction of efficient heterojunction by covalently bonded bridging.

关键词： Ternary heterojunction Black phosphorus nanosheets Covalent bond Photocatalytic degradation Graphitic carbon nitride

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Recurrent malignant hyperthermia after scoliosis correction surgery

引用

World Journal of Emergency Medicine 2024年第1期15卷 70-72页

作者： junfeng Su Man Huang Department of General Intensive Care Unit the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310052China Key Laboratory of Early Warning and Intervention of Multiple Organ Failure Ministry of Education of the People's Republic of ChinaHangzhou 310052China

Malignant hyperthermia(MH)is a genetic disorder of skeletal muscle cells that affects muscle cytoplasmic calcium homeostasis,with high mortality and low ***,it presents with non-specific signs of a hypermetabolic response,including high fever,tachycardia,and elevated end-tidal carbon dioxide(ETCO_(2)).The successful treatment lies in the timely recognition and early use of dantrolene.[1]As an inhibitor of Ca2+release through ryanodine receptor(RYR)channels,the skeletal muscle relaxant dantrolene has proven to be both a valuable experimental probe of intracellular Ca2+signaling and a lifesaving treatment for MH.[2]Dominant mutations in the skeletal muscle RYR1 gene are well-recognized causes of both malignant hyperthermia susceptibility(MHS)and central core disease(CCD).

关键词： hyperthermia malignant elevated

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Interferon-gamma regulates the progression of neuroblastoma cells through interferon-regulatory factor-1

引用

BIOCELL 2024年第9期48卷 1343-1353页

作者： JING WANG junfeng XU YINGRAN yang YOUZHENG QIU SHANSHAN ZHANG NING WANG School of Clinical Medicine Dali UniversityDali671000China Department of Radiology The First Affiliated Hospital of Dali UniversityDali UniversityDali671000China Department of Pediatric Surgery The First Affiliated Hospital of Dali UniversityDali UniversityDali671000China

Objective:This study aimed to elucidate the influence of IFN-gamma(IFN-γ)in neuroblastoma(NB)cells and reveal its potential underlying molecular ***:The Cell Counting Kit-8,Transwell apparatus,and flow cytometry were employed to assess cellular viability,migratory capacity,invasive potential,and apoptotic rates,***-seq combined with bioinformatics analysis revealed differentially expressed genes(DEGs)and their possible biological *** levels were determined by western blot ***:IFN-γtreatment resulted in diminished cell viability,mitigated migratory and invasive capabilities,and augmented apoptotic activity in the SK-N-BE(2)cell line,whereas it exhibited the opposite effect in SH-SY5Y ***,interferon regulatory factor 1(IRF-1)was the common DEG in both IFN-γ-treated SK-N-BE(2)and SH-SY5Y ***,we found that it was underexpressed in NB *** depletion of IRF-1 promoted the progression of both SK-N-BE(2)and SH-SY5Y ***,IRF-1 knockdown effectively counteracted the effects of IFN-γon SK-N-BE(2)cells,while exacerbating them in SH-SY5Y ***:This study verified that IFN-γexerted a distinct role in both N-Myc-and non-N-Myc-amplified NB cells,partially by mediating the expression of IRF-1,suggesting that it may serve as a potent agent for treating patients with NB.

关键词： Neuroblastoma N-Myc-amplified Non-N-Myc-amplified IFN-γ IRF-1

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

抗疲劳制造技术现状与发展趋势

引用

新技术新工艺 2024年第3期435卷 9-15页

作者：王小海刘国强杨俊峰王磊潘树民王艳丽中国兵器内蒙古第一机械集团股份有限公司内蒙古包头014030

近年来,航空、航天、车辆、铁路交通、风电等领域对机械传动零部件抗疲劳性能要求日益提高,使抗疲劳制造技术成为一个备受关注的研究领域。总结了抗疲劳制造技术的原理、现状与发展趋势。首先,介绍了目前影响疲劳性能的关键因素和提高... 详细信息

近年来,航空、航天、车辆、铁路交通、风电等领域对机械传动零部件抗疲劳性能要求日益提高,使抗疲劳制造技术成为一个备受关注的研究领域。总结了抗疲劳制造技术的原理、现状与发展趋势。首先,介绍了目前影响疲劳性能的关键因素和提高疲劳性能的途径;其次,对现有的抗疲劳技术进行分类和典型抗疲劳方法进行阐述,并对现有抗疲劳技术的发展趋势和技术进行总结归纳。通过全面评述抗疲劳制造技术的现状和发展趋势,旨在为相关领域的研究者提供参考,促进抗疲劳制造技术的创新与发展。

关键词：抗疲劳制造表面完整性无应力集中喷丸强化激光冲击强化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Innovative Solutions for High-Performance Silicon Anodes in Lithium-Ion Batteries:Overcoming Challenges and Real-World Applications

引用

Nano-Micro Letters 2024年第9期16卷 341-384页

作者： Mustafa Khan Suxia Yan Mujahid Ali Faisal Mahmood yang Zheng Guochun Li junfeng Liu Xiaohui Song Yong Wang Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuPeople’s Republic of China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013JiangsuPeople’s Republic of China School of Materials Science and Engineering Hefei University of TechnologyHefei 230009AnhuiPeople’s Republic of China

Silicon(Si)has emerged as a potent anode material for lithium-ion batteries(LIBs),but faces challenges like low electrical conductivity and significant volume changes during lithiation/delithiation,leading to material pulverization and capacity *** research on nanostructured Si aims to mitigate volume expansion and enhance electrochemical performance,yet still grapples with issues like pulverization,unstable solid electrolyte interface(SEI)growth,and interparticle *** review delves into innovative strategies for optimizing Si anodes’electrochemical performance via structural engineering,focusing on the synthesis of Si/C composites,engineering multidimensional nanostructures,and applying non-carbonaceous *** a stable SEI is vital to prevent electrolyte decomposition and enhance Li^(+)transport,thereby stabilizing the Si anode interface and boosting cycling Coulombic *** also examine groundbreaking advancements such as self-healing polymers and advanced prelithiation methods to improve initial Coulombic efficiency and combat capacity *** review uniquely provides a detailed examination of these strategies in real-world applications,moving beyond theoretical *** offers a critical analysis of these approaches in terms of performance enhancement,scalability,and commercial *** conclusion,this review presents a comprehensive view and a forward-looking perspective on designing robust,high-performance Si-based anodes the next generation of LIBs.

关键词： Silicon anode Energy storage Nanostructure Prelithiation Binder

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Low-Enthalpy and High-Entropy Polymer Electrolytes for Li-Metal Battery

引用

Energy & Environmental Materials 2024年第1期7卷 91-99页

作者： Haitao Zhang Yuchen Wang junfeng Huang Wen Li Xiankan Zeng Aili Jia Hongzhi Peng Xiong Zhang Weiqing yang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China

lonic-conductive solid-state polymer electrolytes are promising for the development of advanced lithium batteries yet a deeper understanding of their underlying ion-transfer mechanism is needed to improve *** we demonstrate the low-enthalpy and high-entropy(LEHE)electrolytes can intrinsically generate remarkably free ions and high mobility,enabling them to efficiently drive lithium-ion *** LEHE electrolytes are constructed on the basis of introducing CsPbl_(3)perovskite quantum dots(PQDs)to strengthen PEO@LiTFSI *** extremely stable cycling>1000 h at 0.3 mA cm^(-2)can be delivered by LEHE ***,the as-developed Li|LEHE|LiFePO_(4)cell retains 92.3%of the initial capacity(160.7 mAh g^(-1))after 200 *** cycling stability is ascribed to the suppressed charge concentration gradient leading to free lithium *** is realized by a dramatic increment in lithium-ion transference number(0.57 vs 0.19)and a significant decline in ion-transfer activation energy(0.14 eV vs 0.22 eV)for LEHE electrolytes comparing with PEO@LiTFSI *** CsPbl_(3)PQDs promote highly structural disorder by inhibiting crystallization and hence endow polymer electrolytes with low melting enthalpy and high structural entropy,which in turn facilitate long-term cycling stability and excellent rate-capability of lithium-metal batteries.

关键词： charge concentration gradient lithium dendrites lithium-metal battery low-enthalpy and high-entropy polymer electrolyte

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：