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Equation of state for boron nitride along the principal Hugoniot to 16 Mbar

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Matter and Radiation at Extremes 2024年第5期9卷 77-86页

作者： Huan Zhang Yutong Yang Weimin Yang Zanyang Guan Xiaoxi Duan Mengsheng Yang Yonggang Liu Jingxiang Shen Katarzyna Batani Diluka Singappuli Ke Lan Yongsheng Li wenyi huo Hao Liu Yulong Li Dong Yang Sanwei Li Zhebin Wang Jiamin Yang Zongqing Zhao Weiyan Zhang Liang Sun Wei Kang Dimitri Batani National Key Laboratory of Plasma Physics Laser Fusion Research CenterChina Academy of Engineering PhysicsMianyang 621900China HEDPS Center for Applied Physics and Technologyand College of PhysicsPeking UniversityBeijing 100871China HEDPS Center for Applied Physics and Technologyand School of EngineeringPeking UniversityBeijing 100871China Institute of Plasma Physics and Laser Microfusion Hery 2301-497 WarszawaPoland Universitéde Bordeaux CNRSCEACELIA(Centre Lasers Intenses et Applications)UMR 5107F-33405 TalenceFrance Institute of Applied Physics and Computational Mathematics Beijing 100094China

The thermodynamic properties of boron nitride under extreme pressures and temperatures are of great interest and importance for materials science and inertial confinement fusion physics,but they are poorly understood owing to the challenges of performing experiments and realizing ab initio ***,we report the first shock Hugoniot data on hexagonal boron nitride at pressures of 5–16 Mbar,using hohlraum-driven shock waves at the SGIII-p laser facility in *** density functional theory molecular dynamics calculations closely match experimental data,validating the equations of state for modeling the shock response of boron nitride and filling a crucial gap in the knowledge of boron nitride properties in the region of multi-Mbar pressures and eV *** results presented here provide fundamental insights into boron nitride under the extreme conditions relevant to inertial confinement fusion,hydrogen–boron fusion,and high-energy-density physics.

关键词： boron Hugoniot extreme

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汽车行止安全智能监控系统

计算机应用与软件 2024年第2期41卷 340-344页

作者：王秀刘保罗刘永鹏霍文怡洛阳理工学院计算机与信息工程学院河南洛阳471023

以减少交通事故的发生和挽救车内滞留儿童的生命为初衷,设计并实现一款汽车行止安全智能监控系统,为生命安全加一份保障。该系统采用前端采集设备、阿里云平台和移动端App三层架构,基于AI人脸表情识别技术、酒精检测传感器、空气质量检... 详细信息

以减少交通事故的发生和挽救车内滞留儿童的生命为初衷,设计并实现一款汽车行止安全智能监控系统,为生命安全加一份保障。该系统采用前端采集设备、阿里云平台和移动端App三层架构,基于AI人脸表情识别技术、酒精检测传感器、空气质量检测传感器实现对酒驾醉驾、疲劳驾驶、儿童滞留车内情况的云端远程监控,系统设置多级预警与紧急控制措施机制,实现汽车行止安全智能监控,预防事故的发生。

关键词：安全智能监控 AI表情识别酒驾醉驾疲劳驾驶车内人员滞留云端远程监控

Analysis of hohlraum energetics of the SG series and the NIF experiments with energy balance model

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Matter and Radiation at Extremes 2017年第1期2卷 22-27页

作者： Guoli Ren Jie Liu wenyi huo Ke Lan Institute of Applied Physics and Computational Mathematics Beijing 100094China

The basic energy balance model is applied to analyze the hohlraum energetics data from the Shenguang(SG)series laser facilities and the National Ignition Facility(NIF)experiments published in the past few *** analysis shows that the overall hohlraum energetics data are in agreement with the energy balance model within 20%*** 20%deviation might be caused by the diversity in hohlraum parameters,such as material,laser pulse,gas filling density,*** addition,the NIF's ignition target designs and our ignition target designs given by simulations are also in accordance with the energy balance *** work confirms the value of the energy balance model for ignition target design and experimental data assessment,and demonstrates that the NIF energy is enough to achieve ignition if a 1D spherical radiation drive could be created,meanwhile both the laser plasma instabilities and hydrodynamic instabilities could be suppressed.

关键词： Energy balance model Hohlraum energetics National Ignition Facility(NIF) Shenguang(SG)series

Mechanical size effect of eutectic high entropy alloy:Effect of lamellar orientation

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Journal of Materials Science & Technology 2021年第23期82卷 10-20页

作者： Yujie Chen Xianghai An Sam Zhang Feng Fang wenyi huo Paul Munroe Zonghan Xie Centre for Advanced Thin Films and Devices School of Materials and EnergySouthwest UniversityChongqing 400715China School of Mechanical Engineering The University of AdelaideAdelaideSA 5005Australia School of Aerospace Mechanical and Mechatronic EngineeringThe University of SydneySydneyNSW 2006Australia Jiangsu Key Laboratory of Advanced Metallic Materials Southeast UniversityNanjing 211189China School of Materials Science and Engineering University of New South WalesSydneyNSW 2052Australia

The effect of lamellar orientation on the deformation behavior of eutectic high entropy alloy at the micrometer scale,and the roles of two rarely explored laminate orientations(i.e.,the lamellar orientation at~0°and 45°angles with the loading direction)in regulating size-dependent plasticity were investigated using in-situ micropillar compression *** alloy,CoCrFe NiTa_(0.395),consists of alternating layers of Laves and FCC *** was found that the yield stress of the 0°pillars scaled inversely with the pillar diameters,in which the underlying deformation mode was observed to transform from pillar kinking or buckling to shear banding as the diameter *** the case of the 450 pillars with diameters ranging from 0.4 to 3μm,there exists a’weakest’diameter of~1μm,at which both constraint effect and dislocation starvation are *** of the lamellar orientations,the strain hardening rate decreased with decreasing pillar diameter due to the diminishing dislocation accumulation that originated from the softening nature of large shear bands in the 0°pillars,and the enhanced probability of dislocation annihilation at the increased free surfaces in the 45°*** findings expand and deepen the understanding of the mechanical size effect in small-scale crystalline materials and,in so doing,provide a critical dimension for the development of high-performing materials used for nanoor microelectromechanical systems.

关键词： High-entropy alloy Eutectic structure Orientation dependence Mechanical size effect In-situ micropillar testing

P2 asymmetry of Au's M-band flux and its smoothing effect due to high-Z ablator dopants

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Matter and Radiation at Extremes 2017年第2期2卷 69-76页

作者： Yongsheng Li Chuanlei Zhai Guoli Ren Jianfa Gu wenyi huo Xujun Meng Wenhua Ye Ke Lan Weiyan Zhang Institute of Applied Physics and Computational Mathematics Beijing 100094China Graduate School China Academy of Engineering PhysicsBeijing 100088China Center for Applied Physics and Technology Peking UniversityBeijing 100871China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China China Academy of Engineering Physics Mianyang 621900China

X-ray drive asymmetry is one of the main seeds of low-mode implosion asymmetry that blocks further improvement of the nuclear per-formance of“high-foot”experiments on the National Ignition Facility[Miller et al.,*** 44,S228(2004)].More particularly,the P2 asymmetry of Au's M-band flux can also severely influence the implosion performance of ignition capsules[Li et al.,*** 23,072705(2016)].Here we study the smoothing effect of mid-and/or high-Z dopants in ablator on Au's M-band flux asymmetries,by modeling and comparing the implosion processes of a Ge-doped ignition capsule and a Si-doped one driven by X-ray sources with P2 M-band flux *** the results,(1)mid-or high-Z dopants absorb hard X-rays(M-band flux)and re-emit isotropically,which helps to smooth the asymmetric M-band flux arriving at the ablation front,therefore reducing the P2 asymmetries of the imploding shell and hot spot;(2)the smoothing effect of Ge-dopant is more remarkable than Si-dopant because its opacity in Au's M-band is higher than the latter's;and(3)placing the doped layer at a larger radius in ablator is more *** this effect may not be a main measure to reduce the low-mode implosion asymmetry,but might be of significance in some critical situations such as inertial confinement fusion(ICF)experiments very near the performance cliffs of asymmetric X-ray drives.

关键词： Inertial confinement fusion Implosion Low-mode distortion M-band flux asymmetry High-Z dopant

A scheme to implement the Deutsch-Josza algorithm on a superconducting charge-qubit quantum computer

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Progress in Natural Science:Materials International 2006年第6期16卷 594-599页

作者： huo wenyi and LONG Guilu (Key Laboratory for Quantum Information and Measurements, and Department of Physics, Tsinghua University, Beijing 100084, China Key Laboratory for Atomic and Molecular NanoSciences, Tsinghua University, Beijing 100084, China) Key Laboratory for Quantum Information and Measurements and Department of Physics Tsinghua University Beijing 100084 China Key Laboratory for Atomic and Molecular NanoSciences Tsinghua University Beijing 100084 China

We have studied the implementation of the Deutsch-Josza quantum algorithm in a superconducting charge-qubit quantum computer. Different from previous studies, we have used the inductance coupled system of You et al. The detailed pulse sequences have been designed for the four possible functions in a 2-qubit system. The result is generalized to an arbitrary n-qubit system. This scheme will be useful for practical implementation of the algorithm.

关键词： superconducting quantum computer Deutsch-Josza algorithm.

熔覆电流对氩弧熔覆FeCrNiCoMn高熵合金涂层组织及显微硬度的影响

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金属热处理 2014年第9期39卷 45-47页

作者：霍文燚时海芳辽宁工程技术大学材料科学与工程学院辽宁阜新123000

采用氩弧熔覆工艺在Q235基体上制备了等摩尔比FeCrNiCoMn高熵合金涂层,采用倒置金相显微镜、自动转塔显微硬度计及3D激光共聚焦显微镜对高熵合金涂层组织及显微硬度进行了分析。结果表明,不同熔覆电流下,FeCrNiCoMn高熵合金涂层均主要... 详细信息

采用氩弧熔覆工艺在Q235基体上制备了等摩尔比FeCrNiCoMn高熵合金涂层,采用倒置金相显微镜、自动转塔显微硬度计及3D激光共聚焦显微镜对高熵合金涂层组织及显微硬度进行了分析。结果表明,不同熔覆电流下,FeCrNiCoMn高熵合金涂层均主要由枝晶组织和枝晶间组织组成,且其枝晶间组织中均生成了大量纳米级的析出物。在180~190 A范围内,随熔覆电流的增大,组织显著细化,且枝晶间组织中纳米级析出物形状规则,分布均匀;熔覆电流增大至200 A,涂层组织过度粗大,枝晶间组织被破坏,枝晶间组织中纳米析出物形状、分布均不理想。不同熔覆电流下,FeCrNiCoMn高熵合金涂层表面显微硬度差别不大。180、190 A熔覆电流制备的涂层比200 A熔覆电流制备的涂层截面显微硬度分布更理想。

关键词：氩弧熔覆高熵合金熔覆电流组织显微硬度

纳米孪晶强化CoCrFeNi高熵合金线材微结构及其在若干典型环境下的腐蚀行为

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稀有金属 2018年第12期42卷 1233-1240页

作者：周晖霍文燚方峰胡显军蒋建清东南大学江苏省先进金属材料高技术研究重点实验室江苏南京211189 江苏省沙钢钢铁研究院江苏张家港215625 南京林业大学江苏南京210037

纳米孪晶强化CoCrFeNi高熵合金线材以其优异的力学性能被视为是传统线材面向苛刻工况应用的潜在替代品。采用电弧熔炼、冷热机械加工、剧烈冷变形技术制备纳米孪晶强化CoCrFeNi高熵合金线材,采用场发射扫描电镜(FE-SEM)、透射电镜(TEM)... 详细信息

纳米孪晶强化CoCrFeNi高熵合金线材以其优异的力学性能被视为是传统线材面向苛刻工况应用的潜在替代品。采用电弧熔炼、冷热机械加工、剧烈冷变形技术制备纳米孪晶强化CoCrFeNi高熵合金线材,采用场发射扫描电镜(FE-SEM)、透射电镜(TEM)分析其微结构,利用电化学分析在3. 5%(质量分数) Na Cl,1 mol·L^(-1)H2SO4,1 mol·L^(-1)Na OH溶液中分别分析CoCrFeNi高熵合金线材的腐蚀行为,采用FESEM观察其在不同介质中的腐蚀形貌,分析CoCrFeNi高熵合金线材在不同介质中的腐蚀机制。结果表明,CoCrFeNi高熵合金线材经冷变形后呈纤维状组织,其在3种典型环境下的耐蚀性均较为理想。其在3. 5%Na Cl溶液中的腐蚀机制主要为点蚀,自腐蚀电流密度低至3. 85×10^-7A·cm^(-2),腐蚀后仅有极少量蚀坑存在。而在1 mol·L^(-1)H2SO4与1 mol·L^(-1)Na OH溶液为均匀腐蚀,自腐蚀电流密度分别可达1. 26×10^-6,7. 88×10^-6A·cm^(-2),腐蚀形貌呈均匀腐蚀特征。CoCrFeNi高熵合金线材在3. 5%Na Cl溶液、1 mol·L^(-1)H2SO4溶液与1 mol·L^(-1)Na OH溶液中均具有较好的耐蚀性,具备在这几种典型环境应用的潜力。

关键词：高熵合金纳米孪晶形变电化学行为腐蚀机制

熔覆电流对AlCrFeCoNiCu高熵合金涂层显微组织的影响

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金属热处理 2014年第8期39卷 24-27页

作者：霍文燚时海芳张竞元辽宁工程技术大学材料科学与工程学院辽宁阜新123000

采用氩弧熔覆工艺在06Cr19Ni10钢基体上制备等摩尔比AlCrFeCoNiCu高熵合金涂层。采用10%草酸溶液体系对不同熔覆电流制备的高熵合金涂层进行电解腐蚀,采用倒置金相显微镜观察试样显微组织,采用3D激光共聚焦显微镜对高熵合金涂层中的细... 详细信息

采用氩弧熔覆工艺在06Cr19Ni10钢基体上制备等摩尔比AlCrFeCoNiCu高熵合金涂层。采用10%草酸溶液体系对不同熔覆电流制备的高熵合金涂层进行电解腐蚀,采用倒置金相显微镜观察试样显微组织,采用3D激光共聚焦显微镜对高熵合金涂层中的细小析出物进行微区三维显微形貌分析,并采用自动转塔显微硬度计对其截面显微硬度进行分析。结果表明,以不同熔覆电流制备的AlCrFeCoNiCu高熵合金涂层均由枝晶组织、枝晶间组织、块状析出物以及纳米级析出物组成。以240 A熔覆电流制备的涂层由于热输入过大,过热粗化的枝晶组织在凝固过程中发生臂端部位的熔解。240 A熔覆电流制备的熔覆层的表面硬度达到最高,但截面硬度较低。230 A熔覆电流制备的熔覆层的表面硬度、截面硬度均较理想。

关键词：氩弧熔覆高熵合金熔覆电流显微组织显微硬度