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脉冲激光亦或电子束辐照对suS316L奥氏体不锈钢中空位扩散的影响

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工程科学学报 2017年第6期39卷 903-908页

作者：杨苏冰杨占兵王会北京科技大学冶金与生态工程学院北京100083 北京科技大学钢铁冶金新技术国家重点实验室北京100083

利用激光-超高压电子显微镜系统在500℃对suS316L奥氏体不锈钢进行了电子束辐照和脉冲激光-电子束双束同时辐照(以下简称:同时辐照),通过观察和分析辐照后自由晶界处无空洞区域以及元素偏析,以电子束辐照结果为标准,对比研究了同时辐照... 详细信息

利用激光-超高压电子显微镜系统在500℃对suS316L奥氏体不锈钢进行了电子束辐照和脉冲激光-电子束双束同时辐照(以下简称:同时辐照),通过观察和分析辐照后自由晶界处无空洞区域以及元素偏析,以电子束辐照结果为标准,对比研究了同时辐照对空位扩散的影响.结果表明:同时辐照后的无空洞区域宽度为48±16 nm,小于电子辐照的71±27 nm;不论在偏析程度还是偏析宽度上,同时辐照条件下Cr和Ni的偏析都小于对应的电子束辐照;同时辐照下空位的扩散通量仅为电子束辐照的45.7%.通过分析得出,和电子辐照相比,同时辐照促进了空位与间隙原子的再结合,限制空位向尾闾扩散,进而造成流入尾闾的空位数量减少,极大地抑制了辐照偏析与肿胀.脉冲激光-电子束双束同时辐照可以为探索抑制肿胀方法提供新的思路.

关键词：奥氏体不锈钢脉冲激光-电子束双束同时辐照过饱和空位无空洞区域辐照偏析辐照肿胀

脉冲激光辐照对316L不锈钢重位点阵晶界的影响

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表面技术 2019年第5期48卷 201-208页

作者：曲晓健杨占兵杨苏冰北京科技大学冶金与生态工程学院北京100083 北海道大学

目的提高316L不锈钢的重位点阵晶界比例,减少随机晶界的比例,改善材料的抗晶间腐蚀性能。方法选择合适的辐照温度,利用Nd:YAG激光器对suS316L奥氏体不锈钢表面进行飞秒和纳秒激光辐照。通过电子背散射衍射技术分析辐照样品的晶界特征分... 详细信息

目的提高316L不锈钢的重位点阵晶界比例,减少随机晶界的比例,改善材料的抗晶间腐蚀性能。方法选择合适的辐照温度,利用Nd:YAG激光器对suS316L奥氏体不锈钢表面进行飞秒和纳秒激光辐照。通过电子背散射衍射技术分析辐照样品的晶界特征分布,研究不同激光辐照条件对试样晶界的影响。此外,在透射电镜下,观察脉冲激光辐照样品中的晶体缺陷和Σ3晶界。结果相比于未辐照试样,723 K下飞秒激光辐照使试样的Σ3晶界比例增加2.88%,R晶界比例减少4.24%;723 K下纳秒激光辐照使试样的Σ3晶界比例增加10.78%,R晶界比例减少9.97%;773 K下纳秒激光辐照使试样的Σ3晶界比例增加12.52%,R晶界比例减少10.68%。在透射电镜下观察到,773K下脉冲激光辐照试样中存在大量的堆垛层错四面体,但在孪晶形核的"台阶"内部没有发现该类缺陷。结论重位点阵晶界比例的变化主要与晶界迁移和孪晶形成有关,其中脉冲激光辐照产生的能量为试样趋肤层的晶界迁移提供有利的条件,而辐照引起的晶体缺陷会促进晶界迁移过程中孪晶的形核和生长。

关键词：脉冲激光辐照晶界迁移孪晶 Σ3晶界层错四面体晶界特征分布

电子辐照对9Cr-ODS钢中氧化物稳定性的影响

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中国冶金 2018年第5期28卷 23-27,50页

作者：王会杨占兵杨苏冰罗骥北京科技大学冶金与生态工程学院北京100083 北京科技大学钢铁冶金新技术国家重点实验室北京100083 北京科技大学新材料技术研究院北京100083

利用超高压电子显微镜系统在450、500和550℃下对9Cr-ODS铁素体/马氏体钢（F/M钢）进行了电子束辐照,通过观察和分析辐照前后钢中Y-Ti-O纳米氧化物的形貌及成分变化,对比研究不同温度下电子辐照对氧化物稳定性的影响。结果表明,不同温度... 详细信息

利用超高压电子显微镜系统在450、500和550℃下对9Cr-ODS铁素体/马氏体钢（F/M钢）进行了电子束辐照,通过观察和分析辐照前后钢中Y-Ti-O纳米氧化物的形貌及成分变化,对比研究不同温度下电子辐照对氧化物稳定性的影响。结果表明,不同温度下,电子辐照后的氧化物尺寸发生了不同程度的减小现象。辐照前后氧化物尺寸减小率分别为8.51%（450℃）、19.38%（500℃）和25.99%（550℃）;氧化物内铬成分变化程度关系为550℃〉500℃〉450℃。通过分析得出,电子辐照条件下,钢中Y-Ti-O弥散氧化物抑制了材料的辐照肿胀。高能电子轰击以及辐照中产生的过饱和点缺陷的扩散会促使氧化物中溶质原子移动,从而造成了氧化物尺寸的减小。温度的增加提高了空位的扩散速率,加速了氧化物尺寸的减小。研究9Cr-ODS钢在电子辐照下的损伤行为有助于探究氧化物辐照损伤机理,为后期控制和减少9Cr-ODS钢辐照损伤现象提供依据。

关键词： 9Cr-ODS钢电子辐照 Y-Ti-O纳米氧化物尺寸变化铬成分变化辐照肿胀

辐照温度对suS316L不锈钢中二次缺陷及肿胀的影响

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中国冶金 2020年第3期30卷 35-39页

作者：杨占兵杨苏冰李连奇北京科技大学冶金与生态工程学院北京100083 北海道大学工学部大学院日本札幌060-8628

利用超高压电子显微镜分别在350、400、450以及500℃下对suS316L奥氏体不锈钢进行剂量为3.6 dpa的电子束辐照,通过观察和分析辐照后样品中的空洞和位错环数量密度以及肿胀率,讨论了不同温度下电子束辐照对材料肿胀率的影响。结果表明,... 详细信息

利用超高压电子显微镜分别在350、400、450以及500℃下对suS316L奥氏体不锈钢进行剂量为3.6 dpa的电子束辐照,通过观察和分析辐照后样品中的空洞和位错环数量密度以及肿胀率,讨论了不同温度下电子束辐照对材料肿胀率的影响。结果表明,不同温度下,样品中都产生二次缺陷,如位错环和空洞;空洞引起辐照肿胀;在350~450℃范围内,肿胀率随着温度升高而增加,并在450℃达到最高;450℃后,肿胀率降低。不同温度下,两种二次缺陷对于点缺陷的尾闾强度不同,肿胀率与位错环、空洞在显微组织中所占比例有关。试验研究辐照肿胀率与二次缺陷间的关系,为进一步理解辐照肿胀机理、寻求抑制辐照肿胀的方法提供依据。

关键词：电子束辐照空洞位错环辐照肿胀

A surface engineering strategy for the stabilization of zinc metal anodes with montmorillonite layers toward long-life rechargeable aqueous zinc ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 94-105页

作者： Wenbo Wang Ruifeng Xu Xu Zhang Peiyu Wang Bao yang bingjun yang Juan yang Kailimai su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Chen Key Laboratory for Electronic Materials College of Electrical Engineering Northwest Minzu University Resource Chemistry and Energy Materials Research Center State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute for Materials and Processes School of Engineering University of Edinburgh

Rechargeable aqueous zinc-ion batteries （AZIBs） exhibit appreciable potential in the domain of electrochemical energy ***,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction （HER）,and corrosion side ***,we propose a surface engineering modification strategy for coating the montmorillonite （MMT） layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable *** results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc *** functional theory（DFT） calculations and water contact angle （CA） tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn2+and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling ***,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm-2and 0.125 m A h cm-2,even exceeding 1800 h long cycling under harsh conditions of 5 m A cm-2and 1.25 m A h *** MMT@Zn||V2O5full cell reaches over 3000 cycles at 2 A g-1with excellent rate ***,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.

关键词： surface engineering strategy Montmorillonite layer Protection mechanism of Zn anode Cycling stability Aqueous zinc ion batteries

Deep eutectic solvents for separation and purification applications in critical metal metallurgy:Recent advances and perspectives

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 1-19页

作者： Shuo Chen Shengpeng su Yanfang Huang bingbing Liu Hu sun Shuzhen yang Guihong Han School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China Zhongyuan Critical Metals Laboratory Henan ProvinceZhengzhou 450001China

Solvent extraction,a separation and purification technology,is crucial in critical metal *** solvents commonly used in solvent extraction exhibit disadvantages,such as high volatility,high toxicity,and flammability,causing a spectrum of hazards to human health and environmental *** solvents have been recognized as potential alternatives to these harmful organic *** the past two decades,several neoteric solvents have been proposed,including ionic liquids(ILs)and deep eutectic solvents(DESs).DESs have gradually become the focus of green solvents owing to several advantages,namely,low toxicity,degradability,and low *** this critical review,their classification,formation mechanisms,preparation methods,characterization technologies,and special physicochemical properties based on the most recent advancements in research have been systematically ***,the major separation and purification applications of DESs in critical metal metallurgy were comprehensively ***,future opportunities and challenges of DESs were explored in the current research *** conclusion,this review provides valuable insights for improving our overall understanding of DESs,and it holds important potential for expanding separation and purification applications in critical metal metallurgy.

关键词： deep eutectic solvents preparations properties separation and purification critical metal metallurgy

Gamma-glutamyl transferase 5 overexpression in cerebrovascular endothelial cells improves brain pathology,cognition,and behavior in APP/PS1 mice

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Neural Regeneration Research 2025年第2期20卷 533-547页

作者： Yanli Zhang Tian Li Jie Miao Zhina Zhang Mingxuan yang Zhuoran Wang Bo yang Jiawei Zhang Haiting Li Qiang su Junhong Guo Department of Neurology First Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Neurology Sixth Hospital of Shanxi Medical University(General Hospital of Tisco)TaiyuanShanxi ProvinceChina Department of Physiology Key Laboratory of Cellular PhysiologyMinistry of EducationShanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Hernia and Abdominal Wall surgery Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalThird Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Laboratory Medicine of Fenyang College Shanxi Medical UniversityFenyangShanxi ProvinceChina

In patients with Alzheimer’s disease,gamma-glutamyl transferase 5(GGT5)expression has been observed to be downregulated in cerebrovascular endothelial ***,the functional role of GGT5 in the development of Alzheimer’s disease remains *** study aimed to explore the effect of GGT5 on cognitive function and brain pathology in an APP/PS1 mouse model of Alzheimer’s disease,as well as the underlying *** observed a significant reduction in GGT5 expression in two in vitro models of Alzheimer’s disease(Aβ_(1-42)-treated hCMEC/D3 and bEnd.3 cells),as well as in the APP/PS1 mouse ***,injection of APP/PS1 mice with an adeno-associated virus encoding GGT5 enhanced hippocampal synaptic plasticity and mitigated cognitive ***,increasing GGT5 expression in cerebrovascular endothelial cells reduced levels of both soluble and insoluble amyloid-βin the brains of APP/PS1 *** effect may be attributable to inhibition of the expression ofβ-site APP cleaving enzyme 1,which is mediated by nuclear factor-kappa *** findings demonstrate that GGT5 expression in cerebrovascular endothelial cells is inversely associated with Alzheimer’s disease pathogenesis,and that GGT5 upregulation mitigates cognitive deficits in APP/PS1 *** findings suggest that GGT5 expression in cerebrovascular endothelial cells is a potential therapeutic target and biomarker for Alzheimer’s disease.

关键词： Alzheimer’s disease amyloid-β APP/PS1 mice cerebrovascular endothelial cells cognitive deficits gamma-glutamyl transferase 5 neurovascular unit nuclear factor‐kappa B synaptic plasticity β-site APP cleaving enzyme 1

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弹性变形对前掠翼气动特性的影响分析

飞行力学 2017年第2期35卷 6-10页

作者：冯浩洋苏新兵马斌麟王宁空军工程大学航空航天工程学院陕西西安710038

针对弹性变形对前掠翼气动特性的影响,基于改进的CFD/CSD松耦合静气动弹性数值计算方法,在高亚声速条件下,对前掠角χ=10°,20°,30°的前掠翼纵向气动特性和副翼操纵效率进行了计算和分析。结果表明,迎角较小时,弹性翼的升力、升阻比... 详细信息

针对弹性变形对前掠翼气动特性的影响,基于改进的CFD/CSD松耦合静气动弹性数值计算方法,在高亚声速条件下,对前掠角χ=10°,20°,30°的前掠翼纵向气动特性和副翼操纵效率进行了计算和分析。结果表明,迎角较小时,弹性翼的升力、升阻比和俯仰力矩较刚性翼大,大迎角时恰恰相反;随着前掠角的增加,机翼的弯扭变形和气动参数变化的程度愈加剧烈;在最大升阻比、迎角α=4°、副翼偏转角δ=20°时,弹性翼的副翼操纵效率略大于刚性翼。该研究可为前掠翼布局的设计提供借鉴。

关键词：弹性变形前掠翼机翼掠角气动特性副翼效率

Reduced mesencephalic astrocyte-derived neurotrophic factor expression by mutant androgen receptor contributes to neurodegeneration in a model of spinal and bulbar muscular atrophy pathology

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Neural Regeneration Research 2025年第9期20卷 2655-2666页

作者： Yiyang Qin Wenzhen Zhu Tingting Guo Yiran Zhang Tingting Xing Peng Yin Shihua Li Xiao-Jiang Li su yang Guangdong Key Laboratory of Non-human Primate Research Key Laboratory of CNS Regeneration(Ministry of Education)Guangdong–HongKong–Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina

Spinal and bulbar muscular atrophy is a neurodegenerative disease caused by extended CAG trinucleotide repeats in the androgen receptor gene,which encodes a ligand-dependent transcription facto *** mutant androgen receptor protein,characterized by polyglutamine expansion,is prone to misfolding and forms aggregates in both the nucleus and cytoplasm in the brain in spinal and bulbar muscular atrophy *** aggregates alter protein-protein interactions and compromise transcriptional *** this study,we reported that in both cultured N2a cells and mouse brain,mutant androgen receptor with polyglutamine expansion causes reduced expression of mesencephalic astrocyte-de rived neurotrophic *** n of mesencephalic astrocyte-derived neurotrophic factor amelio rated the neurotoxicity of mutant androgen receptor through the inhibition of mutant androgen receptor *** down endogenous mesencephalic astrocyte-derived neurotrophic factor in the mouse brain exacerbated neuronal damage and mutant androgen receptor *** findings suggest that inhibition of mesencephalic astrocyte-derived neurotrophic factor expression by mutant androgen receptor is a potential mechanism underlying neurodegeneration in spinal and bulbar muscular atrophy.

关键词： androgen receptor mesencephalic astrocyte-derived neurotrophic factor mouse model neurodegeneration neuronal loss neurotrophic factor polyglutamine disease protein misfolding spinal and bulbar muscular atrophy transcription factor