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Solid solution strengthening of high-entropy alloys from first-principles study

Journal of Materials Science & Technology 2022年第26期121卷 105-116页

作者： H.L.zhang D.D.Cai X.Sun H.Huang S.Lu y.z.wang Q.M.Hu L.Vitos X.D.Ding State Key Laboratory for Mechanical Behavior of Materials Frontier Institute of Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research College of StomatologyXi’an Jiaotong UniversityXi’an 710049China Department of Materials Science and Engineering The Ohio State University2041 College RoadColumbusOH 43210United States Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908China Applied Materials Physics Department of Materials Science and EngineeringRoyal Institute of TechnologyStockholm SE-10044Sweden

Solid solution strengthening(SSS)is one kind of strengthening mechanisms and plays an important role in alloy design,in particular for single-phase alloys including high-entropy alloys(HEAs).The classical Labusch–Nabarro model and its expansions are most widely applicable to treating SSS of solid solution alloys including both conventional alloys(CAs)and *** this study,the SSS effects in a series of Febased CAs and HEAs are investigated by using the classical Labusch–Nabarro model and its *** size misfit and shear modulus misfit parameters are derived from first-principles *** on available experimental data in combination with empirical SSS model,we propose fitting constants(i.e.,the ratio between experimental hardness and predicted SSS effect)for these two families of *** predicted host/alloy family-dependent fitting constants can be used to estimate the hardness of these SSS *** agreement between predicted and measured hardness values is satisfactory for both CAs and HEAs,implying that the proposed approach is reliable and successful.

关键词： Alloys Solid solution strengthening Hardness Size misfit parameter Shear modulus misfit parameter First-principles calculations

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Identification of Watermelon mosaic virus infecting sesame in China

Identification of Watermelon mosaic virus infecting sesame i...

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中国植物病理学会2015年学术年会

作者： y.SHI y.J.SHI y.z.wang z.y.wang H.L.LI College of Plant Protection Henan Agricultural University

Seasame(Sesamum indicum) as one of the important economic crops in China is mainly distributed in Henan and Hubei province.A survey of viral diseases on sesame was carried out during the summer of 2014 in Henan province,*** the survey ten sesame fields in zhengzhou and zhumadian were investigated and in eight fileds mosaic,reduced leaf size,leaf deformation and leaf puckering were observed on sesame plants though the viral disease incidence was relatively low during our *** symptomatic samples were collected for virus *** RNA was extracted from symptomatic leaves and subjected to reverse transcription RT-PCR with degenerate primer pairs within the family Potyviridae,NIb2F(GTITGyGTIGAyGAyTTyAAyAA) and NIb3R(TCIACIACIGTIGAIGGyTGNCC)?(zheng et al.2010).The expected 350-bp potyvirus-specific amplicon was observed in all symptomatic plants but not in the healthy *** amplicons were cloned and sequenced(GenBank Accession ***978924-KM978933).NCBI BLAST search showed that eight samples shared 95%9%nucleotide(nt) identity to Bean common mosaic virus strain peanut stripe isolate Laixi(GenBank Accession ***439722).The peanut stripe isolate of Bean common mosaic virus was previously reported as the pathogen causing mosaic disease in sesame(yan et al.2009).The other two samples shared the highest nt identity of 92%and 95%to Watermelon mosaic virus C04-106(WMV,GenBank Accession ***273469).WMV infection was previously reported in sesames in Korea(Chang et al.1980).During our investigation WMV infection in sesame which displayed symptoms of mosaic,dwarfing,reduced leaf size,small and reduced pods threatened sesame production in Henan *** two samples were further amplified by RT-PCR with WMV specific primer pair,wmv8249F(ACACACCAATCTTAGCGC) and wmv9798R(GACCAGTTTACCTAGTCT),which amplified a 1.5-kb product spanning 3’ half of the NIb gene to the 3’ UTR covering the full-length CP *** analyses indicated that CP g

关键词： Watermelon mosaic virus identification coat protein

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Formation mechanisms and applications of self-organized core/shell composite powder in immiscible liquid system

Formation mechanisms and applications of self-organized core...

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第二届海峡两岸功能材料科技与产业峰会（2015）

作者： X.J.Liu C.P.wang R.P.Shi y.z.wang J.H.zHu Department of Materials Science and Engineering College of MaterialsXiamen University Department of Materials Science and Engineering The Ohio State University

In nature,there exists a considerable number of monotectic alloys with a liquid miscibility gap. Under the guidance of the calculation of phase diagrams CALPHAD method,it was recently discovered the self-organized composite powders with core-shell(CS) and core-shell-corona(CSC) microstructures in many immiscible liquid alloys,which were previously obtained only in outer space,can be fabricated under gravity condition on earth using conventional gas atomization(see Fig.1)[1].

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Sm_2Fe_(17)C_x化合物的磁性能

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电工合金 1994年第2期 37-39页

作者：李彦奎 y.z.wang

本文介绍用x射线衍射、热磁分析及超导量子干涉磁强计对铸态Sm2Fe（17）Cx化合物的结构特性和磁性能进行的系统研究，其中0≤x≤1．5。晶体结构研究表明，三元系碳化物形成三角晶Th2zn（17）型结构，在室温下晶格常数随x增高而增大，从... 详细信息

本文介绍用x射线衍射、热磁分析及超导量子干涉磁强计对铸态Sm2Fe（17）Cx化合物的结构特性和磁性能进行的系统研究，其中0≤x≤1．5。晶体结构研究表明，三元系碳化物形成三角晶Th2zn（17）型结构，在室温下晶格常数随x增高而增大，从而证明碳以填隙方式代换。居里温度随x增高而急剧升高，从X＝0时的TC＝130℃到X＝1．5时的Tc＝247℃。在2：17结构中引入填隙碳原子能导致Sm2Fe（17）Cx化合物的磁晶各向异性的剧变．K1值随x增高而增大，并且会出现易面各向异性向易轴各向异性的转变。

关键词：三元合金 Sm2Fe17Cx 磁性

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Effect of Al_(2)O_(3)on the Mechanical Properties of(B_(4)C+Al_(2)O_(3))/Al Neutron Absorbing Materials

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Acta Metallurgica Sinica(English Letters) 2024年第8期37卷 1411-1420页

作者： J.X.Cai B.M.Shi N.Li y.Liu z.G.zhang y.N.zan Q.z.wang B.L.Xiao z.y.Ma Shi‑Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Nuclear Equipment Division Beijing Institute of Nuclear EngineeringChina Nuclear Power Engineering Co.Ltd.Beijing 100840China Department of Materials Science School of Mechanical EngineeringShenyang UniversityShenyang 110044China

B_(4)C/Al composites are widely utilized as neutron absorbing materials for the storage and transportation of spent nuclear *** order to improve the high-temperature mechanical properties of B_(4)C/Al composites,in-situ nano-Al_(2)O_(3)was introduced utilizing oxide on Al powder *** this study,the Al_(2)O_(3)content was adjusted by utilizing spheroid Al powder with varying diameters,thereby investigating the impact of Al_(2)O_(3)content on the tensile properties of(B_(4)C+Al_(2)O_(3))/Al *** was found that the pinning effect of Al_(2)O_(3)on the grain boundaries could hinder the recovery of dislocations and lead to dislocation accumulation at high *** the result,with the increase in Al_(2)O_(3)content and the decrease in grain size,the high-temperature strength of the composites increased *** finest Al powder used in this investigation had a diameter of 1.4μm,whereas the resultant composite exhibited a maximum strength of 251 MPa at room temperature and 133 MPa at 350℃,surpassing that of traditional B_(4)C/Al composites.

关键词： Al matrix composites Neutron absorbing materials (B_(4)C+Al_(2)O_(3))/Al composites High-temperature strength

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On power series statistical convergence and new uniform integrability of double sequences

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Applied Mathematics(A Journal of Chinese Universities) 2024年第3期39卷 519-532页

作者： Sevda y■ld■z Kamil Demirci Sinop University Department of MathematicsSinopTurkey

In the present paper,we mostly focus on P_(p)^(2)-statistical *** will look into the uniform integrability via the power series method and its characterizations for double ***,the notions of P_(p)^(2)-statistically Cauchy sequence,P_(p)^(2)-statistical boundedness and core for double sequences will be described in addition to these findings.

关键词： power series methods statistical convergence uniform integrability double sequences

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Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/CdS heterojunction with photothermal effect for efficient photocatalytic hydrogen production

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Journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.y.Huang z.yang S.y.yang z.H.Dai y.J.Liu J.H.Liao G.y.zhong z.J.Xie y.P.Fang S.S.zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/CdS heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)CdS nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of CdS *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocatalyst Hydrogen evolution

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Rescattering of stimulated Raman side scattering in nonuniform plasmas

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Matter and Radiation at Extremes 2024年第5期9卷 68-76页

作者： S.Tan Q.wang y.Chen W.B.yao C.z.Xiao J.F.Myatt School of Physics and Electronics Hunan UniversityChangsha 410082China Institute of Applied Physics and Computational Mathematics Beijing 100094China School of Electrical and Information Engineering Anhui University of Science and TechnologyHuainanAnhui 232001China Department of Electrical and Computer Engineering University of Alberta9211116 St.NWEdmontonAlberta T6G 1H9Canada

Rescattering of stimulated Raman side scattering(SRSS)is observed for the first time via two-dimensional(2D)particle-in-cell(PIC)*** construct a theoretical model for the rescattering process,which can predict the region of occurrence of mth-order SRSS and estimate its *** rescattering process is identified by the 2D PIC simulations under typical conditions of a direct-drive inertial confinement fusion *** electrons produced by second-order SRSS propagate nearly perpendicular to the density gradient and gain nearly the same energy as in first-order SRSS,but there is no cascade acceleration to produce superhot *** studies for a wide range of ignition conditions show that SRSS and associated rescatterings are robust and important processes in inertial confinement fusion.

关键词： nonuniform acceleration scattering

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Effects of dietary energy feeding level and source on blood metabolites,hormone secretion and follicular fluid composition in gilts

Effects of dietary energy feeding level and source on blood ...

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低碳经济与高效养殖——第六次全国饲料营养学术研讨会暨动物营养学分会成立三十周年大会

作者： D.S.zhou,z.F.Fang,D.Wu~*,y.zhuo,S.y.Xu,y.z.wang,P.zhou,y.Lin (Key Laboratory for Animal Disease Resistance Nutrition of Ministry of Education of China,Institute of Animal Nutrition,Sichuan Agricultural University,ya’an 625014,China)

Fifty-four Landrace×yorkshire crossbred gilts(59.0±4.2 kg and 147±3 days old) were used to examine the effects of dietary energy source(starch or fat,S or F) at high[H-,112.5%of energy requirement recommended by NRC(1998)],normal(N,100%) and low(L,87.5%) energy feeding levels on the blood blood metabolites, hormone secretion and the follicular fluid composition in *** Day 18 after the 2 estrous,serial bloodFifty-four Landrace×yorkshire crossbred gilts(59.0±4.2 kg and 147±3 days old) were used to examine the effects of dietary energy source(starch or fat,S or F) at high[H-,112.5%of energy requirement recommended by NRC(1998)],normal(N,100%) and low(L,87.5%) energy feeding levels on the blood blood metabolites, hormone secretion and the follicular fluid composition in *** Day 18 after the 2 estrous,serial blood

关键词： dietary energy levels and sources gilts metabolites hormone secretion follicle fluid composition

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Rational design of AgGaS/znS/znS quantum dots with a near-unity photoluminescence quantum yield via double shelling scheme

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Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： H.X.Lu H.Liu z.z.Fu y.y.Chen H.Q.Dai z.Hu W.L.zhang R.Q.Guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China yiwu Research Institute of Fudan University YiwuZhejiang 322000China zhongshan-Fudan Joint Innovation Center Zhongshan 528437China

In this study,a two-step method was used to synthesize highly luminescent AgGaS/znS/znS quantum dots(QDs).In the first step,an inner znS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer znS shell,thereby facilitating the formation of a thick outer *** the two-step shelling process,the synthesized AgGaS/znS/znS QDs showed an excellent photoluminescence quantum yield(PLQy)of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLQy reported thus far for AgGaS ***,the effect of halogen ions in zn precursors on the shelling process was *** was proposed that the capacity of halogen ions to coordinate with the QDs influenced the balance between zn cation diffusion and znS shelling ***,the znS shelling reaction was dominant when znCl_(2)was employed,while zn cation diffusion was the dominant process under the I^(−)-rich *** work provides insights into the interfacial restructuring during the znS shelling and offers a clear map for the tailored synthesis of core/shell QDs.

关键词： AgGaS Quantum dots Photoluminescence Core/shell Alloyed core/shell interface

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