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Manipulation of magnetocaloric and elastocaloric effects in Ni-Mn-In alloys by lattice volume and magnetic variation:Effect of Co and Fe co-doping

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Journal of Materials Science & Technology 2024年第5期172卷 156-165页

作者： Xinzeng liang Chi Zhang Jing Bai Jianglong Gu Yudong Zhang Claude Esling Xiang Zhao liang zuo School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Key Laboratory for Anisotropy and Texture of Materials Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Laboratoire d’Étude des Microstructures et de Mécanique des Matériaux LEM3 CNRSUMR 7239University of Lorraine57045 MetzFrance

The effects of Co and Fe co-doping Ni-Mn-In alloy on the phase stability,lattice parameters,mag-netic properties,and electronic structures are systematically investigated by using the first-principles *** indicate that Fe atoms replace the excess Mn2 atoms by direct and indirect coex-istence(Fe→Mn 2 and Fe→In→Mn2);Co substitutes the Ni atoms by direct substitution(Co→Ni)for the Ni-Mn-In *** austenites all exhibit the ferromagnetic(FM)state for the studied *** NM martensites are in the ferrimagnetic(FIM-1)state for the Ni_(2)Mn_(1.5)In_(0.5),Ni_(2)Mn_(1.25)In_(0.5)Fe 0.25,Ni_(1.75)Mn_(1.5)In_(0.5)Co_(0.25),and Ni_(1.75)Mn_(1.25)In_(0.5)Co_(0.25)Fe 0.25 alloys,while the other compositions are in the FM *** phase stability of austenite and martensite decreases with increasing Co and Fe co-doping.A magnetic-structural coupling transition occurs at x<0.25 and y<*** Ni_(1.91)Mn_(1.5)In_(0.5)Co_(0.08)and Ni_(1.91)Mn_(1.42)In_(0.5)Co_(0.08)Fe_(0.08)alloys exhibit an A→6M→NM transformation,accompanied by a magnetic *** Co and Fe are co-doped,the hybridization strength between Co and Fe is greater than that between Co/Fe and *** enhancement of magnetocaloric and elastocaloric effects is favored by larger magnetization difference(△M)and lattice volume change(△V/V_(0)).Based on the calculated phase stability,magneto-structure coupling,△V/V 0 and c/a ratio,one can predict that the Ni_(2)-x Mn_(1.5)-y In_(0.5)Co x Fe y alloy with Co content 0≤x≤0.25 and Fe content 0≤y≤0.05 is predicted to have good magneto-controlled functional behavior.

关键词： Ni-Mn-In-Co-Fe Phase stability Magnetocaloric effect Elastocaloric effect

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Unraveling magnetic properties and martensitic transformation in Mn-rich Ni-Mn-Sn alloys:first-principles calculations and experiments

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Rare Metals 2024年第4期43卷 1769-1785页

作者： Yu Zhang Jing Bai Ke-liang Guo Jia-Xin Xu Jiang-Long Gu Nicola Morley Qui-Zhi Gao Yu-Dong Zhang Claude Esling Xiang Zhao liang zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang110819China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao066004China Department of Material Science and Engineering University of SheffieldSheffieldS13JDUK State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China Laboratoire d’Étude des Microstructures Et de Mécanique des Matériaux University of Lorraine57045MetzFrance

We have investigated the phase stability,magnetic properties,and martensitic transformation thermodynamics/kinetics of the Ni_(24-x)Mn_(18+x+y)Sn_(6-y)(x,y=0,1,2)system by combining the first-principles calculations and *** calculation results show that the optimized lattice parameters are consistent with the experimental ***,we obtain the relation equation for the austenite formation energy(E_(form-A))and Mn content(X_(Mn)):E_(form-A)=507.358X_(Mn)-274.126,as well as for the six-layer modulated(6M)martensite formation energy(E_(form-6M))and Ni content(X_(Ni)):E_(form-6M)=-728.484X_(Ni)+*** ternary phase diagram of the total magnetic moment was *** excess Mn will reduce the total magnetic moment of 6M(Mag6M)and non-modulated(NM)(MagNM)martensites,with the following equations relating the total magnetic moment and Mn content:Mag_(6M)=-15.905X_(Mn)+7.902and Mag_(NM)=-14.781X_(Mn)+7.411,while the effect on austenite is *** variation of total magnetic moment is mainly dominated by the Mn atomic magnetic *** 3d electrons of Mn_(Sn)(Mn at Sn sublattice)play an important role in magnetic properties from the perspective of the electronic density of *** on the thermodynamics of martensitic transformation,the alloys will likely undergo austenite?6M?NM transformation *** the thermodynamic and kinetic results,the martensitic transformation temperature decreases with x increasing and increases with y *** results are expected to provide reference for predicting the phase stability and magnetic properties of NiMn-Sn alloys.

关键词： Ni-Mn-Sn First-principles calculations Martensitic transformation Magnetic property Kinetics

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Giant reversible barocaloric effects with high thermal cycle stability in epoxybonded(MnCoGe)_(0.96)(CuCoSn)_(0.04) composite

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International Journal of Minerals,Metallurgy and Materials 2024年第11期31卷 2528-2534页

作者： Yafei Kuang Kun Tao Bo Yang Peng Tong Yan Zhang Zhigang Sun Kewei Zhang Dunhui Wang Jifan Hu liang zuo College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Shanxi Key Laboratory of Magnetic and Electric Functional Materials and Applications Taiyuan University of Science and TechnologyTaiyuan 030024China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

Hexagonal MnMX-based(M=Co or Ni,X=Si or Ge)alloys exhibit giant reversible barocaloric ***,giant volume expansion would result in the as-cast MnMX ingots fragmenting into powders,and inevitably bring the deterioration of mechanical properties and *** fragmentation can bring degradation of structural transformation entropy change during cyclic application and removal of *** this paper,giant reversible barocaloric effects with high thermal cycle stability can be achieved in the epoxy bonded(MnCoGe)0.96(CuCoSn)0.04 *** reversible isothermal entropy change of 43.0 J·kg^(−1)·K^(−1) and adiabatic temperature change from barocaloric effects(ΔT_(BCE))of 15.6 K can be obtained within a wide temperature span of 30 K at 360 MPa,which is mainly attributed to the integration of the change in the transition temperature driven by pressure of−101 K·GPa^(−1) and suitable thermal hysteresis of 11.1 ***,the variation of reversibleΔ_(TBCE) against the applied hydrostatic pressure reaches up to 43 K·GPa^(−1),which is at the highest level among the other reported giant barocaloric *** importantly,after 60 thermal cycles,the composite does not break and the calorimetric curves coincide well,demonstrating good thermal cycle stability.

关键词： barocaloric effects cycle stability reversible isothermal entropy change reversible adiabatic temperature change MnCoGe alloys

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Finite-temperature ductility-brittleness and electronic structures of Al_(n)Sc(n=1,2 and 3)

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Rare Metals 2024年第8期43卷 3974-3989页

作者： Xue-Qian Wang Ying Zhao Hao-Xuan Liu Shu-Chen Sun Hong-Bo Yang Jia-Min Zhong Gan-Feng Tu Song Li Yu-Dong Zhang Claude Esling Hai-Le Yan liang zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Rare Earth Functional Materials(Xiong'an)Innovation Center Co. Ltd.Xiong'an 071700China Laboratoire d'étude des Microstructures et de Mécanique des Matériaux(LEM3) Unikersitéde Lorraine57045MetzFrance

Finite-temperature ductility-brittleness and electronic structures of Al_(3)Sc,Al_(2)Sc and AlSc are studied comparatively by first-principles calculations and ab initio molecular *** show that Al_(3)Sc and Al_(2)Sc are brittle at both ground state and finite temperatures,while AlSc possesses a significantly superior *** ground state,AlSc is ductile from Pugh's and Poisson's criteria,while it is brittle in Pettifor's *** ductility of all Al_(3)Sc,Al_(2)Sc and AISc improves greatly with the elevated ***,the Cauchy pressure of AlSc undergoes a transition from negative to *** T>600 K,AlSc is unequivocally classified as ductile from all criteria *** all compounds,the Al-Al bond originated from s-p and p-p orbital hybridizations,and the Al-Sc bond dominated by p-d covalent hybridization,are the first and second strongest chemical bonds,*** explain the difference in mechanical properties,the mean bond strength(MBS)is introduced in this *** weaker Al-Al bond in AlSc,leading to a smaller MBS,could be the origin of the softer elastic stiffness and superior intrinsic *** longer length of the Al-Al bond in AlSc is responsible for its weaker bond ***,the enhanced metallicity of the Al-Al bond in AlSc would also contribute to its exceptional *** longer length of the Al-Al bond in AISc is responsible for its weaker bond ***,the enhanced metallicity of the Al-Al bond in AlSc would also contribute to its exceptional ductility.

关键词： Al-Sc Target materials Intrinsic ductility Finite-temperature elastic constant First-principles calculation

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基于大语言模型的《四库全书》自动分类研究

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信息资源管理学报 2024年第5期14卷 23-35页

作者：左亮赵志枭王东波南京农业大学数字人文研究中心南京210095 南京邮电大学社会与人口学院、社会工作学院南京210023 南京农业大学信息管理学院南京210095

在古籍研究掀起热潮以及古籍活化成为时代要求的背景下,古籍自动分类面临更高的要求。结合当下前沿的大语言模型,以《四库全书》史部和经部的25类语料作为输入语料,探究荀子古籍大语言系列模型在古籍自动分类上的分类效果。通过与其基... 详细信息

在古籍研究掀起热潮以及古籍活化成为时代要求的背景下,古籍自动分类面临更高的要求。结合当下前沿的大语言模型,以《四库全书》史部和经部的25类语料作为输入语料,探究荀子古籍大语言系列模型在古籍自动分类上的分类效果。通过与其基座模型对比实验表明,荀子古籍大语言系列模型在古籍自动分类任务中具有明显优势,其中Xunzi-Baichuan2-7B大语言模型的优势最为显著,整体分类F1值达到96.90%;调整训练数据规模的实验表明,荀子古籍大语言模型仅需少量的数据就能够达到与基座模型相当的分类效果。因此,本研究提出的基于荀子古籍大语言模型的古籍自动分类模型,能够实现对古籍的高效细粒度分类,并为资源受限情境下的古籍分类开辟了新途径。

关键词：《四库全书》分类模型荀子古籍大语言模型文本自动分类

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Mixed Elastico-Plasticity Problems with Partially Unknown Boundaries

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Acta Mathematicae Applicatae Sinica 2007年第4期23卷 629-636页

作者： zuo-liang Xu School of Information Renmin University of China Beijing 100872 China

In this paper, we study mixed elastico-plasticity problems in which part of the boundary is known, while the other part of the boundary is unknown and is a free boundary. Under certain conditions, this problem can be transformed into a Riemann-Hilbert boundary value problem for analytic functions and a mixed boundary value problem for complex equations. Using the theory of generalized analytic functions, the solvability of the problem is discussed.

关键词： Mixed elastico-plasticity problems generalized analytic functions unknown boundaries

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沙库巴曲缬沙坦钠治疗急性心肌梗死PCI术后心力衰竭患者的临床研究

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中国临床药理学杂志 2024年第2期40卷 160-164页

作者：牛洁婷王文娟赵莉左亮亮谷倩倩沧州市中心医院老年医学科河北沧州061000

目的探究沙库巴曲缬沙坦治疗急性心肌梗死(AMI)经皮冠状动脉介入术(PCI)术后心力衰竭的效果。方法将接受PCI术治疗的AMI患者随机分为试验组和对照组。2组患者均给予抗血小板聚集、调脂、β-受体阻滞药、利尿药等常规基础治疗,对照组在... 详细信息

目的探究沙库巴曲缬沙坦治疗急性心肌梗死(AMI)经皮冠状动脉介入术(PCI)术后心力衰竭的效果。方法将接受PCI术治疗的AMI患者随机分为试验组和对照组。2组患者均给予抗血小板聚集、调脂、β-受体阻滞药、利尿药等常规基础治疗,对照组在基础治疗上给予马来酸依那普利片(5 mg,bid),试验组在基础治疗上给予沙库巴曲缬沙坦钠片(5 mg,bid)。比较2组患者的临床疗效、心肌损伤标志物、心功能、心室重构指标、血管内皮功能和心血管不良事件(MACEs)。结果试验组和对照组分别入组40例。治疗3个月后,试验组总有效率为95.00%,对照组为80.00%,在统计学上差异有统计学意义(P0.05)。治疗3个月后,试验组AMI患者药物不良反应发生率为12.50%,对照组药物不良反应发生率为17.50%,试验组的药物不良反应发生率与对照组比较,在统计学上差异无统计学意义(P>0.05)。结论沙库巴曲缬沙坦可具备治疗AMI患者PCI术后心力衰竭的效果,能够有效抗心室重构,改善血管内皮功能。

关键词：沙库巴曲缬沙坦经皮冠状动脉介入术急性心肌梗死心力衰竭血管内皮功能心室重构

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珠江河口地表水锰氧化物对磷的“载-卸”作用

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环境科学 2024年第1期45卷 173-180页

作者：李睿梁作兵伍祺瑞杨晨晨田帝高磊陈建耀中山大学地理科学与规划学院广州510275 中国科学院华南植物园退化生态系统植被恢复与管理重点实验室广州510650

地表径流输送的磷在河口水环境营养结构平衡和初级生产力调节中起到了关键作用.通过测定不同季节珠江下游及河口地表水阴阳离子、总磷及其形态、颗粒态铁(PFe)、颗粒态锰(PMn)和颗粒态铝(PAl)等理化性质,探究咸-淡水交互区内磷的时空分... 详细信息

地表径流输送的磷在河口水环境营养结构平衡和初级生产力调节中起到了关键作用.通过测定不同季节珠江下游及河口地表水阴阳离子、总磷及其形态、颗粒态铁(PFe)、颗粒态锰(PMn)和颗粒态铝(PAl)等理化性质,探究咸-淡水交互区内磷的时空分布特征,并识别控制磷迁移转化的关键因素.结果表明,ρ(TP)(28.88~233.68μg·L^(-1))受到沉降和稀释作用随盐度升高呈下降趋势,且占比大小为:溶解态无机磷(DIP,37.3%)>颗粒态无机磷(PIP,22.7%)>溶解态有机磷(DOP,21.0%)>颗粒态有机磷(POP,19.0%).PIP与PFe、PMn和PAl有显著(P<0.05)的共迁移相关关系,水体盐度的升高促进了悬浮颗粒态无机磷的解吸,且该过程主要发生在咸-淡水界面附近.无机磷的固-液分配系数(K_(d))与盐度间的显著正相关关系(P<0.001)表明,高盐度水域PIP主要以更稳定的结合形态存在.K_(d)与PMn的显著正相关关系(P<0.01)证明了Mn氧化物对磷的“载-卸”作用:从淡水环境中吸附携载无机磷,迁移至高盐度水体释放.

关键词：咸-淡水交互区盐度梯度磷赋存形态迁移转化

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Effects of External Electric Field on AlN Precipitation and Recrystallization Texture of Deep-drawing 08Al Killed Steel Sheet

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Journal of Materials Science & Technology 2006年第6期22卷 747-750页

作者： Xiang ZHAO Zhuochao HU liang zuo Key Laboratory for Anisotropy Design and Texture Engineering of Materials （Ministry of Education） Northeastern University Shenyang 110004 China

The effects of an electric field on AIN precipitation and recrystallization texture were investigated. Cold-rolled 08Al killed steel sheets were annealed at 550℃ according to the two-step processes, for various maintaining times, with and without applying an electric field. It was found that the electric field promotes the precipitation of the second phase （AlN particles）, strengthens the γ-fiber and weakens the α-fiber texture component in the recrystallized specimens. A possible explanation for the reinforcement of γ-fiber texture by the electric field is that the second phase AIN particle promotes the growth of γ-fiber at the expense of differently oriented grains.

关键词： Electric field annealing AlN Recrystallization texture 08Al killed steel sheet

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Effect of Zener-Hollomon parameter on deformation microstructure in Fe-3%Si alloy

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Acta Metallurgica Sinica(English Letters) 2011年第1期24卷 1-8页

作者： Fenghui AN Yuhui SHA Fang ZHANG liang zuo Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education) Northeastern UniversityShenyang I10819 China

Hot deformation of Fe=3%Si alloy within the temperature range of 1073-1473 K and strain rate range of 0.01-5 s-1 was carried out by compression test. Optical microscopy （OM）, electron backscattered diffraction （EBSD） and transmission electron microscopy （TEM） were used to characterize the deformation microstructure on various scales. Dynamic recovery is the dominant softening mechanism under all experimental conditions. A dynamic recovery region and partial dynamic recrystallization region can be distinguished according to Zener-Hollomon parameter （Z） based on OM observation. Furthermore, the quantitative description of subgrain size and boundary misorientation has been set up as a function of Zener-Hollomon Darameter.

关键词： Fe-3%Si Hot deformation Microstructure Zener-Hollomonparameter

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