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high throughput synthesis enabled exploration of CoCrFeNi-based high entropy alloys

Journal of Materials Science & Technology 2022年第15期110卷 269-282页

作者： L.zhao L.Jiang L.X.Yang h.wang W.Y.zhang G.Y.Ji X.zhou W.A.Curtin X.B.Chen P.K.Liaw S.Y.Chen h.z.wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Metal Materials CharacterizationCentral Iron and Steel Research InstituteBeijing 100081China Institute for Advance Studies in Precision Materials Yantai UniversityYantai 264005China National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China Laboratory for Multiscale Mechanics Modeling Ecole Polytechnique Federale de LausanneLausanne CH-1015Switzerland School of Engineering RMIT UniversityMelbourne 3046Australia Department of Materials Science and Engineering The University of Tennessee37996USA

To accelerate the exploration,screening,and discovery of structural high-entropy alloys with targeted properties,the newly developed high-Throughput hot-Isostatic-Pressing based Micro-Synthesis Approach(hT-hIP-MSA)is employed to efficiently synthesize and characterize 85 combinatorial alloys in a 13-principal element alloying *** Co Cr Fe Ni-based high entropy alloys span 1 quaternary,9 quinary,and 36 senary alloy systems,and their composition-structure-property relationships are characterized and analyzed experimentally and *** the single-phase FCC CoCrFeNi alloy base,with Mn,Cu,Ti,Nb,Ta,Mo,W,Al,and Si as principal element alloying additions,we find(1)the extended Mn solubility in the single-phase FCC CoCrFeNi-Mn_(x) alloys,(2)the destabilizing behavior for most of the quinary and senary alloys,and(3)the distinctive solid-solution-strengthening effects in the *** combining the computational methods,the hT-hIP-MSA can be systematic and economic to explore and refine the compositions,structures,and properties of structural high-entropy alloys.

关键词： high-entropy alloys high-throughput Composition-structure-property

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YIELD MODELLING OF MITTEN CRAB, ERIOChEIR SINENSIS IN YANGTzE LAKES

YIELD MODELLING OF MITTEN CRAB, ERIOCHEIR SINENSIS IN YANGTZ...

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第十九届国际动物学大会

作者： h.z.wang h.J.wang X.M.Liang Y.D.Cui Institute of hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China Institute of hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China Institute of hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China Institute of hydrobiology Chinese Academy of Sciences Wuhan 430072 Hubei China

＜正＞Mitten-crab-culture in Chinese lakes is undergoing reduction in profitability inasmuch as natural food sources are being over-exploited by heavy stocking. With purpose for sustainable crab fisheries, we carried out a study on empirical modelling of crab yield in 20 farms of 4 Yangtze lakes. The results show that submersed macrophytes is the key factor affecting crab yield （CY, kg/ha）. hence, macrophyte bio-mass in winter and spring （ WBMac, SBMac, g/m2）, the time of stocking, is used as the driving variable to generate models:

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Precipitation of multi-type nano-quasicrystals in a Mg-zn-Y alloy

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Journal of Magnesium and Alloys 2024年第3期12卷 997-1008页

作者： W.z.wang X.z.zhou L.F.zhang h.Q.Ye z.Q.Yang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China Ji hua Laboratory Foshan 528251China Foshan University Foshan 528231China

Mg-6zn-1Y(at.%)ribbons with strengthening precipitates of multi-type nanoquasicrystals were prepared by melt-spinning followed by aging *** evolution of the rapidly solidified ribbons during isothermal aging was comprehensively studied using various electron microscopy *** new kinds of decagonal quasicrystals were formed in aged ribbons,in addition to precipitation of nanometer icosahedral ***-resolution observations reveal that both decagonal quasicrystals can be modeled by quasiperiodic tiling with decagonal clusters of 2.5 nm in diameter,but overlap of neighboring clusters in both decagonal quasicrystals is different from the Gummelt model observed in other quasicrystals.A shell composed of complex Laves Mg-zn domains was formed surrounding each decagonal quasicrystal precipitate upon prolonged *** addition,all kinds of nanoprecipitates exhibit excellent structure and size stability at 573 *** findings may have implications for not only fundamental studies about quasicrystals,but also microstructural manipulation of high-performance Mg alloys.

关键词： Quasicrystal Mg alloys Rapid solidification Scanning-transmission electron microscopy.

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Fabrication of sub micrometer crystalline structure by holography combined with laser-induced thermoplasticity

Fabrication of sub micrometer crystalline structure by holog...

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CCAST“光子晶体”研讨会

作者： X.wang, h.M.Su, L.z.zhang, Y.J.he, X.G.zheng, h.z.wang State Key Laboratory of Ultrafast Laser Spectroscopy, zhongshan University, Guangzhou 510275, P.R.China

＜正＞A novel method for fabrication of permanent submicrometer periodicstructures by interference laser fields is reported, and the mechanism ofthe method is also investigated. The new method is holographiclithography combined with laser-induced thermoplasticity. Thecrystalline structures that results from this method not only can bemaintained after the optical field is evacuated but also can be rewritten bythe exposal of interference laser fields for the second time. The process offabrication is rapid, convenient and effective.

关键词： holographic lithography laser-induce-thermoplastic sub-micrometer structure diffraction gratings, photonic crystal.

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Existing of SARS-CoV like viruses in domestic civets in China

Existing of SARS-CoV like viruses in domestic civets in Chin...

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2004年中国科学院新生病毒性疾病控制学术讨论会

作者： h.z.wang F.Deng h.Song B.K.Bai h.L.wang G.W.zhang z.L.Shi L.J.Tang Y.W.zhou X.F.An W.Q.hu z.Chen S.Y.zhang S.J.Chen G.P.zhao z.Chen z.hu Wuhan Institute of Virology CAS Ruijin hospital Affiliated to Shanghai Second Medical University hubei CDC Tongji Medical College Institute of zoology CAS Chinese National human Genome Center at Shanghai Wuhan Institute of Virology CAS

he SARS coronavirus (SARS-CoV) has been identified to be the cause of SARS, yet it remains unclear where the SARS coronavirus evolved from. Evidence suggests the SARS-CoV emerged from animal sources and it has been reported that SARS-CoV like virus were found from himalayan palm civets in a lived animal market in Guangdong China (Guan et al., 2003). In this work, we studied the existing of SARS-CoV like virus in domestic civets in China. Three civet farms, named CS, ES, WF, in hubei and hunan Provinces of China were investigated. Oral swabs, fecal swabs, and serum samples were taken from about 10 civets in each farm. The oral swabs were tested with RT-PCR for viral nucleic acid and with ELISA for viral antigen. Serum samples were tested with ELISA for SARS-CoV specific antibodies. Some of the RT-PCR products were cloned and sequenced. Tissue samples from certain civets were also collected and observed under electron microscope. In situ hybridization using SARS-CoV specific probes were also performed. Combing the primary results of all the tests, it suggests that SARS-CoV like viruses exist in domestic civets and can cause chronic infection in those animals.

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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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Dedicated SiPM array for GRD of GECAM

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Radiation Detection Technology and Methods 2022年第1期6卷 63-69页

作者： D.L.zhang X.L.Sun z.h.An X.Q.Li X.Y.Wen K.Gong C.Cai z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao D.Y.Guo J.J.he D.J.hou Y.G.Li C.Y.Li G.Li L.Li X.F.Li M.S.Li X.h.Liang X.J.Liu Y.Q.Liu F.J.Lu h.Lu B.Meng W.X.Peng F.Shi h.wang J.z.wang Y.S.wang h.z.wang X.Wen S.Xiao S.L.Xiong Y.B.Xu Y.P.Xu S.Yang1 X.zhou J.W.Yang Fan zhang S.N.zhang C.Y.zhang C.M.zhang Fei zhang X.Y.zhao Institute of high Energy Physics CASBeijing 100049China State Key Laboratory of Particle Detection and Electronics Beijing 100049China

Purpose The discovery of gravitational waves and gamma-ray bursts heralds the era of multi-messenger *** the adoption of two small satellites to achieve the all-sky monitoring of gamma-ray bursts,the gravitational wave highenergy electromagnetic counterpart all-sky monitor(GECAM)possesses a quasi-real-time early warning ability and plays an important role in positioning the sources of gravitational waves and in subsequent *** satellite of GECAM was fitted with 253-inch-diameter gamma-ray detectors(GRD),covering an energy range of 8–2 *** have adopted silicon photomultiplier tubes(SiPM)in lieu of photomultiplier tubes(PMT)to adapt to the dimensional limitations of *** A unique 3-inch circular SiPM array was *** this design,646×6 mm chips were arranged evenly in a circular manner with the seams filled with reflecting films,thus achieving satisfactory uniformity of light *** integrated pre-amplifier circuit on the back of the SiPM array adopted two-level grouping and summing;further,it achieved a satisfactory signal-to-noise *** high-gain and low-gain channels were adopted to achieve a large dynamic range,and two independent power supply units were used,where each unit can be closed separately,thus improving *** Performance studies show that this SiPM array meets the requirements of *** A 3-inch SiPM array have been developed that uses grouped summation,reflective films,a circular arrangement,two groups of independent power supplies,high-and low-gain signals,differential signal output technologies,*** solution can be used not only for GECAM,but also as a general solution for SiPM-based scintillation detectors.

关键词： SiPM GECAM Gamma-ray Signal-to-noise ratio Reflecting film Pre-amplifier

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The design and performance of charged particle detector onboard the GECAM mission

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Radiation Detection Technology and Methods 2022年第1期6卷 53-62页

作者： Y.B.Xu X.Q.Li X.L.Sun S.Yang h.wang W.X.Peng X.h.Liang K.Gong Y.Q.Liu D.Y.Guo X.Y.zhao C.Y.Li z.h.An J.J.he X.J.Liu X.Y.Wen S.L.Xiong Fan zhang D.L.zhang C.Y.zhang C.Cai z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao D.J.hou Y.G.Li G.Li L.Li X.F.Li M.S.Li F.J.Lu h.Lu B.Meng F.Shi J.z.wang Y.S.wang h.z.wang X.Wen S.Xiao Y.P.Xu J.W.Yang Q.B.Yi S.N.zhang C.M.zhang F.zhang Y.zhao X.zhou Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Background The Gravitational wave highly energetic Electromagnetic Counterpart All-sky Monitor(GECAM)is dedicated to detecting gravitational wave gamma-ray *** is capable of all-sky monitoring over and discovering gamma-ray bursts and new radiation *** consists of two microsatellites,each equipped with 8 charged particle detectors(CPDs)and 25 gamma-ray detectors(GRDs).Purpose The CPD is used to measure charged particles in the space environment,monitor energy and flow intensity changes,and identify between gamma-ray bursts and space charged particle events in conjunction with *** CPD uses plastic scintillator as the sensitive material for detection,silicon photomultiplier array as the optically readable device,and the inlaid Am-241 radioactive source as the onboard calibration *** In this paper,we will present the working principle,physical design,functional implementation and preliminary performance test results of the *** a result,the energy range of electron,gamma-ray detection efficiency and dead time are tested to be better than the indexes required through the ground calibration experiment.

关键词： GECAM CPD SiPM

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The data acquisition algorithm designed for the SiPM-based detectors of GECAM satellite

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Radiation Detection Technology and Methods 2022年第1期6卷 70-77页

作者： Y.Q.Liu K.Gong X.Q.Li X.Y.Wen z.h.An C.Cai z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao D.Y.Guo J.J.he D.J.hou Y.G.Li C.Y.Li G.Li L.Li X.F.Li M.S.Li X.h.Liang X.J.Liu F.J.Lu h.Lu B.Meng W.X.Peng F.Shi X.L.Sun h.wang J.z.wang Y.S.wang h.z.wang X.Wen S.Xiao S.L.Xiong Y.B.Xu Y.P.Xu S.Yang J.W.Yang Q.B.Yi Fan zhang D.L.zhang S.N.zhang C.Y.zhang C.M.zhang Fei zhang X.Y.zhao Y.zhao X.zhou Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China Physics and Space Science College China West Normal UniversityNanchong 637002China

Background The Gravitational Wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)consists of 2 microsatellites,each of which contains 25 GRD(LaBr3)detectors and 8 CPD(plastic scintillator)*** silicon photomultiplier(SiPM)array is used to read each *** output signal of these detectors with SiPM array is very special and challenging to *** this study,a novel data acquisition(DAQ)algorithm for these detectors is designed and implemented,and the content of the output event packet is *** and Conclusion The performances,including the event acquisition efficiency of this DAQ algorithm,are extensively verified through experimental *** the on-ground and in-flight tests,this algorithm has excellent performance despite the very limited resources and short development time of GECAM mission.

关键词： Silicon photomultiplier Digital waveform processing Data acquisition

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Quality assurance test and failure analysis of SiPM arrays of GECAM satellites

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Radiation Detection Technology and Methods 2022年第1期6卷 35-42页

作者： D.L.zhang M.Gao X.L.Sun X.Q.Li z.h.An X.Y.Wen C.Cai z.Chang G.Chen C.Chen Y.Y.Du R.Gao K.Gong D.Y.Guo J.J.he D.J.hou Y.G.Li C.Y.Li G.Li L.Li X.F.Li M.S.Li X.h.Liang X.J.Liu Y.Q.Liu F.J.Lu h.Lu B.Meng W.X.Peng F.Shi h.wang J.z.wang Y.S.wang h.z.wang X.Wen S.Xiao S.L.Xiong Y.B.Xu Y.P.Xu S.Yang J.W.Yang Fan.zhang S.N.zhang C.Y.zhang C.M.zhang Fei zhang X.Y.zhao X.zhou Institute of high Energy Physics CASBeijing 100049People’s Republic of China

Background The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)satellite developed a SiPM-based gamma-ray detector to monitor the gravitational wave-related GRBs and guide subsequent observations in other wavelengths of *** As all the available SiPM devices belong to commercial grade,quality assurance tests need to be performed in accordance with the aerospace *** In the SiPM application of GECAM,quality assurance experiments were *** mechanism of the failure of SiPM devices was analyzed during the development *** Based on the quality assurance test results,the fnal pass rate of SiPM array was 95%.Based on the failure analysis,it was found that a piece of SiPM had a leakage channel after longtime operation due to device *** According to the accumulated experience,in the reliability test of SiPM,it is necessary to pay special attention to test the impedance of each pin of SiPM to ground and confrm that the power switch state of SiPM is controllable.

关键词： Gravitational waves Gamma-ray detectors Silicon photomultipliers Quality assurance test Failure analysis

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