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| 1 | Tensile deformation behavior and mechanical properties of a bulk cast Al0.9 CoFeNi2 eutectic high-entropy alloy显示文摘In this study,a new Al0.9CoFeNi2 eutectic high entropy alloy(EHEA) was designed,and the microstructures as well as the deformation behavior were investigated.The bulk cast Al0.9CoFeNi2 EHEA exhibited an order face-centered cubic FCC(L12) and an order body-centered cubic(B2) dual-phase lamellar eutectic microstructure.The volume fractions of FCC(L12) and B2 phases are measured to be 60 % and 40 %,respectively.The combination of the soft and ductile FCC(L12) phase together with the hard B2 phase resulted in superior strength of 1005 MPa and ductility as high as 6.2 % in tension at room temperature.The Al0.9CoFeNi2 EHEA exhibited obvious three-stage work hardening characteristics and high workhardening ability.The evolving dislocation substructure s during uniaxial tensile deformation found that planar slip dominates in both FCC(L12) and B2 phases,and the FCC(L12) phase is easier to deform than the B2 phase.The post-deformation transmission electron microscopy revealed that the sub-structural evolution of the FCC(L12) phase is from planar dislocations to bending dislocations,high-density dislocations,dislocation network,and then to dislocation walls,and Taylor lattices,while the sub-structural evolution of the B2 phase is from a very small number of short dislocations to a number of planar dislocations.Moreover,obvious ductile fracture in the FCC(L12) phase and a brittle-like fracture in the B2 phase were observed on the fracture surface of the Al0.9CoFeNi2 EHEA.The re search results provide some insight into the microstructure-property relationship. | Hui Jiang Dongxu Qiao Wenna Jiao Kaiming Han Yiping Lu Peter K.Liaw | 2021 | Journal of Materials Science & Technology2021，，2： | 3 |
| 2 | Effects of Chromium on the Microstructures and Mechanical Properties of AlCoCrxFeNi2.1 Eutectic High Entropy Alloys显示文摘In the present study,a series of AlCoCrxFeNi2.1(x=0,0.25,0.5,0.75,1.0)eutectic high entropy alloys(EHEAs)have been designed and prepared.And the effect of Cr content on the microstructures and mechanical properties of the AlCoCrxFeNi2.1 alloys was systematically investigated.The results indicate that the AlCoCrxFeNi2.1(x>0)alloys exhibit almost complete lamellar eutectic microstructures with a mixture structure of FCC and B2 phases.And the AlCoFeNi2.1 alloy without Cr element exhibited a hypoeutectic microstructure with a primary B2 phase.In addition,the eutectic microstructures for AlCoCrxFeNi2.1 eutectic alloys do not change significantly.The room temperature compressive tests results show that with an increase in Cr content(from x=0 to x=1.0),the yield strength will first decrease,and thereafter increase.The trend is the opposite with the fracture strength and plastic strain.They show an increase trend at first,and then decrease.The AlCoCr0.5 FeNi2.1(Cr0.5)alloy shows the best comprehensive mechanical properties.The tensile yield strength,fracture strength,and elongation are 536.5 MPa,1062 MPa,and 13.8%,respectively.Furthermore,the Cr0.5 alloy also displays a high strength with a yield strength of 362 MPa at 700℃.In summary,by changing the Cr content,AlCoCrxFeNi2.1 eutectic high entropy alloys with excellent comprehensive mechanical properties were obtained and prepared. | Hui Jiang Li Li Rui Wang Kaiming Han Quanwei Wang | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，11： | 2 |
| 3 | Construction of Alkenyl-Functionalized Spirocarbocyclic Scaffolds from Alkyne-Containing Phenol-Based Biaryls via Sequential lodine-Induced Cyclization/Dearomatization and Pd-Catalyzed Coupling of N-Tosylhydrazones显示文摘of main obse rvation and conclusion An efficient strategy for the formation of alkenyl-functionalized spirocarbocyclic scaffolds from alkyne-containing phenol-based biaryls via sequential iodine-induced cyclization/dearomatization and Pd-catalyzed coupling of N-tosylhydrazones is developed.The approach provides various spirocarbocyclic compounds in moderate to excellent yields with good functional tolerance.The results also demonstrate the feasibility for the direct cross-couplings of N-tosyl hydrazones with sterically congested tetrasubstituted alkenyl halides. | Anjia Liu Kaiming Han Xin-Xing Wu Shufeng Chen Jianbo Wang | 2020 | Chinese Journal of Chemistry2020，38，11： | 1 |
| 4 | Follow-up of women with breast cancer: comparison between MRI and FDG PET显示文摘 | Gerhard W. Goerres Sven C. A. Michel Mathias K. Fehr Achim H. Kaim Hans C. Steinert Burkhardt Seifert Gustav K. Schulthess Rahel A. Kubik-Huch | 2003 | European Radiology2003，，7： | 1 |
| 5 | Circ_ASPH promotes cholangiocarcinoma growth and metastasis through the miR-581/ATP-binding cassette transporter G1 signaling pathway显示文摘Dear Editor,Cholangiocarcinoma(CCA)is an aggressive malignant tumor of the hepatobiliary system,mainly originating from the cholangiocytes of small intrahepatic bile ducts[1].The overall survival of patients with CCA is still unfavorable[1].Circular RNAs(circRNAs)are a type of non-coding RNAs with limited protein-coding capacity[2]and have shown to exert regulatory effects in multiple diseases by interacting with certain miRNAs to inhibit their expression and functions[3].Emerging evidence indicates that circRNAs can directly bind to several RNA-binding proteins to execute their biological functions.Hence,determining the mechanisms underlying the progression of CCA and searching for new drugs from the perspective of circRNAs are imperative. | Yi Xu Pengcheng Kang Kaiming Leng Yue Yao Guanqun Liao Yi Han Guangjun Shi Xiangyu Zhong Yunfu Cui | 2020 | Cancer Communications2020，40，10： | 1 |
| 6 | Quantitative study on hydrocarbon expulsion mechanism based on micro-fracture显示文摘The significance of source rocks for oil and gas accumulation has been indisputably acknowledged.Moreover,it has been gradually realized that there is difference between hydrocarbon generation capacity and hydrocarbon expulsion capacity,and this has prompted research on hydrocarbon expulsion efficiency.However,these studies dominantly highlight the results of hydrocarbon expulsion,and investigation into the corresponding process and mechanism is primarily from a macroscopic perspective.Despite its wide acceptance as the most direct hydrocarbon expulsion mode,hydrocarbon expulsion through micro-fractures is still not sufficiently understood.Therefore,this study obtains observations and performs experiments on two types of source rocks(mudstones and shales)of the Chang 7 oil group of the Yanchang Formation in Ordos Basin,China.Microscopy reveals that organic matter is non-uniformly distributed in both types of source rocks.Specifically,mudstones are characterized by a cluster-like organic matter distribution,whereas shales are characterized by a layered organic matter distribution.Thermal evolution simulation experiments demonstrate that the hydrocarbon generation process is accompanied by the emergence of micro-fractures,which are favorable for hydrocarbon expulsion.Moreover,based on the theories of rock physics and fracture mechanics,this study establishes micro-fracture development models for both types of source rocks,associated with the calculation of the fracture pressure that is needed for the initiation of fracture development.Furthermore,the relationship between the fluid pressure,fracture pressure,and micro-fracture expansion length during micro-fracture development is quantitatively explored,which helps identify the micro-fracture expansion length.The results indicate that the development of micro-fractures is commonly impacted by the morphology and distribution pattern of the organic matter as well as the mechanical properties of the source rocks.The micro-fractures in turn further affect the hydrocarbon expulsion capacity of the source rocks.The results of this study are expected to provide theoretical and practical guidance for the exploration and exploitation of tight oil and shale oil. | Kaiming Su Jungang Lu Huanxu Zhang Shijia Chen Yong Li Zhenglu Xiao Wen Qiu Meimei Han | 2020 | Geoscience Frontiers2020，11，6： | 1 |
| 7 | A Facile Construction of Bisheterocyclic Methane Scaffolds through Palladium-Catalyzed Domino Cyclization显示文摘Main observation and conclusion A convenient palladium-catalyzed domino cyclization reaction for the construction of bis(benzofuranyl)methane scaffolds bearing an all-carbon quaternary center has been described.In the cascade process,one C(sp2)—O bond,two C(sp2)—C(sp3)bonds as well as two benzofuran rings are formed in a single synthetic sequence.The approach shows wide scope of substrates and good functional-group tolerance.Moreover,this methodology is successfully extended to the synthesis of benzofuranyl methyl chromane derivatives. | Hongbo Qi Kaiming Han Shufeng Chen | 2021 | Chinese Journal of Chemistry2021，39，10： | 0 |
| 8 | One step hot-pressing method for hybrid Li metal anode of solid-state lithium metal batteries显示文摘Safety issues induced by infinite anode volume change and uncontrolled lithium(Li)dendrite growth have become the biggest obstacle to the practical application of Li metal batteries.In addition,the tra-ditional rolling method makes it difficult to manufacture thin Li foil with high mechanical strength and low Li content.Herein,a three-dimensional(3D)lithophilic carbon paper/copper(Cu)current collector hybrid anode with ultra-low Li metal content is prepared by a hot-pressing method.The highly re-versible and stable lithiophilic layer LiC_(x) formed in situ by heating/pressing treatment provides abun-dant nucleation sites and reduces the Li nucleation overpotential,thereby effectively suppressing Li den-drite growth.Moreover,the volume change and pulverization problems of Li metal anode during depo-sition/stripping also can be accommodated by the 3D skeleton.The optimization effect has been directly confirmed by in-situ optical and ex-situ scanning electron microscope observation.Therefore,highly sta-ble performance(158.4 mA h g^(-1) at 2 C after 200 cycles with a capacity retention of 95.24%)in Li@LCP-Cu||NCM811 coin cell can be achieved.Furthermore,the solid-state battery assembled with the hybrid anode,poly(vinylidene fluoride)(PVDF)-based polymer electrolyte and polyethylene oxide(PEO)interface functional layer also exhibits the best electrochemical and safety performance,which also proves that the Li@LCP-Cu anode has great potential for application in solid-state batteries. | Kaiming Wang Yifei Chen Liang Zhang Qihang Zhang Zhi Cheng Yining Su Fei Shen Xiaogang Han | 2023 | Journal of Materials Science & Technology2023，，22： | 0 |
| 9 | Influences of Milling Time and NbC on Microstructure of AlCoCrFeNi_(2.1)High Entropy Alloy by Mechanical Alloying显示文摘AlCoCrFeNi_(2.1)eutectic high entropy alloy(EHEA)and AlCoCrFeNi_(2.1)-x NbC(x=2.5wt%,5.0wt%,7.5wt%,and 10wt%)high entropy alloy(HEAs)were prepared by mechanical alloying(MA).The effects of milling time and NbC content on the alloying behavior and grain size of the AlCoCrFeNi_(2.1)EHEA were investigated.The experimental results show that the AlCoCrFeNi_(2.1)EHEA primarily consists of order BCC(B2)and face-centered-cubic(FCC)phases,while the AlCoCrFeNi_(2.1)-x NbC(x=2.5wt%,5.0wt%,7.5wt%,and 10wt%)HEAs are composed of B2,FCC,and NbC phases.With the increase of milling time,the powder goes through three stages,irregularity,cold welding fracture and spheroidization.The particle size of AlCoCrFeNi_(2.1)EHEA powder shows a trend of first increasing and then decreasing.Therein,the particle size presents a normal distribution during 0-50 h alloying.With the addition of NbC,the AlCoCrFeNi_(2.1)-x NbC HEAs powders are significantly refined.And the degree of grain refinement gradually increases with the increase of NbC content. | LI Li JIANG Hui NI Zhiliang HAN Kaiming WANG Rui WANG Haixia | 2023 | Journal of Wuhan University of Technology(Materials Science)2023，38，2： | 0 |
| 10 | Electrode structure enabling dendrite inhibition for high cycle stability quasi-solid-state lithium metal batteries显示文摘Lithium(Li)metal batteries(LMBs)are widely regarded as the ultimate choice for the next generation of high-energy–density batteries.However,the uncontrollable growth of Li dendrites formed by inhomogeneous deposition seriously hinders its commercialization.Although many studies have achieved significant results in inhibiting the formation of Li dendrites,it is still impossible to eradicate them completely.Therefore,regulating the deposition behavior,such as the growth direction of unevenly deposited Li,is preferable to unilaterally suppressing them in some cases.Here we report a structured anode that can confine the deposited Li within holes and tune it to become vertical-up/horizontal-centripetal mixed growth mode by optimizing the electric field/Li^(+)concentration gradient.The Li^(+) adsorbed by the poly(amic acid)(PAA)insulating layer coated on the anode surface can form the Li^(+)concentration gradient pointing to the center of the hole.Combined with the special electric field formed by the hole structure,it is favorable for the Li^(+)to move into the vertically arrayed holes and simultaneously deposit on the bottom and walls.Furthermore,both in-situ and ex-situ observations confirm that the growth mode is changed and the Li deposition morphology is denser,which can greatly delay capacity fading and prolong cycle life in both liquid and quasi-solid-state LMBs.All the results show that the novel anode provides a new perspective for deep research into solid-state LMBs. | Kaiming Wang Ao Yu Zhiyi Zhou Fei Shen Manni Li Liang Zhang Weichang Guo Yifei Chen Le Shi Xiaogang Han | 2023 | Journal of Energy Chemistry2023，，4： | 0 |
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