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Journal of Rare earths 2024年第4期42卷 775-782页

作者： Glaydson S.dos Reis Diana Pinto sabrina f.l.tke.e.e. c.l.ma luis f.O.Silva Irineu A.S.De Brum Guilherme l.Dotto Department of forest Biomaterials and Technology Biomass Technology centre Swedish University of Agricultural SciencesUmeaE13Swedn Universidad De la costa Calle 58#55-66080002BarranquillaAtlanticoColombia Research Group on Adsorptive and catalytic Process engineering(eNGePAc) Federal University of Santa MariaAv.Roraima100079705900Santa MariaRSBrazil Institute of chemistry Federal University of Rio Grande do Sul90040060Porto AlegreBrazil

chitin powder and chitin-aerogel were prepared from shrimp wastes and used to uptake Y^(3+)from aqueous solutions and concentrate this rare earth element from phosphogypsum(PG).chitin aerogel displays a specific surface area of 945 m^(2)/g,while chitin powder is 3.6 m^(2)/g,which largely influences its adsorption *** the adsorption in synthetic solutions,the effect of pH on Y^(3+)removal is strong for chitin powder *** contrast,no big pH influence was detected for chitin *** interactions and chelation can highlight the proposed mechanism of Y^(3+)on chitin adsorbents for the powder and ***,in addition to these interactions,pore filling/pore diffusion is the main mechanism of Y^(3+)removal in the chitin *** aerogel is efficient in concentrating 8 times the Y^(3+)from PG,a very complex *** complex chitin aerogel-Y^(3+)can be a secondary source of rare earth elements for other applications.

关键词： Rare earths Sustainable material chitin powder chitin porous aerogel Yttrium adsorption and recovery

Uncovering the hierarchical clusters in the heat-affected zone of an electron beam weldedα/βtitanium alloy joint

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Journal of materials Science & Technology 2024年第7期174卷 120-132页

作者： c.Xu X.H.Shao H.J.Yang M.lv H.Q.liu X.l.ma Shenyang National laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and engineering University of Science and Technology of ChinaShenyang 110016China Suzhou laboratory Suzhou 215028China Department of Mechanical engineering Kyushu UniversityFukuoka 819-0395Japan Bay Area center for electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808China

Using high-resolution transmission Kikuchi diffraction(TKD)and transmission electron microscopy(TeM),we examined the hierarchical clusters that form in situ in the heat-affected zone(HAZ),which are com-monly referred to as“ghost”structures,of bimodal titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4cr(wt%,Tc17).The ghost structures are enriched with Al elements but poor in Mo and cr compared to the surroundingβ*** results show that the ghost structure in middle-HAZ mainly consists ofα_(l)laths with a high-angle grain boundary,which exhibits the classic Burgers orientation relationship(BOR)with the host matrix,while it encircles theα_(P)grains in *** the ghost structure is evidenced to form via in-complete martensitic *** results further confirm that the ghost structure is composed ofαl and tinyβ_(l)laths with BOR,with the former being enriched with Al and poor with cr and Mo,while the latter is the ***,twoα_(l)variant clusters with a check-mark morphology are fre-quently observed viewed along[0001]_(αl)//[110]_(βl)directions,which are dominated by the crystallographic and geometrical relationships betweenαandβ*** on the microstructural characterization,it is hypothesized that the ghost structure is transformed from the initialα_(P)phase,due to the coupling ef-fect of high thermal stress(which induces the formation of a large number of dislocations)and element diffusion caused by sudden temperature increase and plunge cooling in the HAZ during the welding pro-cess.

关键词： Tc17 titanium alloy electron beam welding(eBW) The ghost structure Transmission Kikuchi diffraction(TKD) Transmission electron microscopy(TeM)

A single degenerated primer significantly improves cOX1 barcoding performance in soil nematode community profiling

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Soil ecology letters 2024年第2期6卷 31-44页

作者： Yincai Ren Dorota l. Porazinska Quanhui ma Shuhan liu Hongmei li Xue Qing Department of Plant Pathology Nanjing Agricultural UniversityNanjing210095China Department of entomology and Nematology University of FloridaGainesvilleFL32611USA Institute of Grassland Science Key Laboratory of Vegetation Ecology of the Ministry of EducationJilin Songnen Grassland Ecosystem National Observation and Research StationNortheast Normal UniversityChangchun130024China

A new cOX1 primer for soil nematode metabarcoding was designed,and this primer outperforms other commonly used cOX1 primer pairs in species recovery and quantity of PcR products.•The lack of reference database is the main reason that led to the low species recovery in cOX1 metabarcoding.•We expanded current NcBI database by adding 51 newly generated cOX1 reference *** nematodes play important roles in soil ecosystems and often serve as bioindicators of soil *** identification of soil nematodes is often difficult due to their limited diagnostic characters and high phenotypic *** barcoding and metabarcoding techniques are promising but lack universal primers,especially for mitochondrial cOX1 *** this study a degenerated cOX1 forward primer cOIfGeD was *** primer pair(cOIfGeD/JB5GeD)outperforms other four commonly used cOX1 primer pairs in species recovery and quantity of polymerase chain reaction(PcR)*** metabarcoding analysis,the reads obtained from the new primer pair had the highest sequencing saturation threshold and amplicon sequence variant(ASV)diversity in comparison to other cOX1 as well as 18S rRNA *** annotation of ASVs suggested the new primer pair initially recovered 9 and 6 out of 25 genera from mock communities,respectively,outperformed other cOX1 primers,but underperformed the widely used 18S Nf1/18Sr2b primers(16 out of 25 genera).By supplementing the cOX1 database with our reference sequences,we recovered an additional 6 mock community species bringing the tally closer to that obtained with 18S *** summary,our newly designed cOX1 primers significantly improved species recovery and thus can be supplementary or alternative to the conventional 18S metabarcoding.

关键词： degenerated primers DNA metabarcoding mitochondrial cytochrome oxidase c subunit I gene phylogeny ribosomal RNA gene soil nematodes

convergent plate boundary environments for formation of≥3800 ma mafic-ultramafic assemblages(Isua area,Greenland):Implications for early global geodynamics

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Geoscience frontiers 2024年第3期15卷 119-136页

作者： Allen P.Nutman clark R.l.friend Vickie c.Bennett School of earth Atmospheric and Life SciencesUniversity of WollongongWollongongNSW 2522Australia Glendale TiddingtonOxon OX92LQUK Research School of earth Sciences Australian National UniversityCanberraACT 2601Australia

In the gneiss terrane on the south side of the eoarchean Isua supracrustal belt,ultramafic rocks with relict abyssal peridotite mineralogy(Bennett et al.,2002;friend et al.,2002;Nutman et al.,2007;Rollinson,2007;van de löcht et al.,2020),layered gabbros with cumulate ultramafic rocks,basalts and associated siliceous sedimentary rocks were tectonically-imbricated,prior to and during intrusion of ca.3800 ma *** with3800 ma basalts in the Outer Arc Group of the nearby Isua supracrustal belt,the composition of all these mafic rocks(e.g.,Th-Hf-Nb systematics,high Th/Yb,Ba/Nb,Ba/Yb ratios and negative Nb and Ti anomalies)shows affinity with modern suprasubduction rocks whose genesis involved fluid fluxing of the upper ***,the majority of these samples have Ba/Nb and Ba/Yb values less than in modern island arc magmas,but similar to many backarc basin magmas(e.g.,Pearce and Stern,2006).It is unknown whether these ca.3800 ma mafic rocks are,(i)arc rocks where the Ba/Nb and Ba/Yb signatures reflect lower surficial Ba in eoarchean oceanic settings,or(ii)in direct comparison with Phanerozoic suites,these signatures reflect a back-arc setting with interplay between fluid fluxing and decompressional *** tectonic intercalation of upper mantle with lower and upper crustal rocks,combined with the fluid-fluxing influences seen in chemistry of all the mafic rocks is best accommodated in a compressional eoarchean convergent plate boundary setting within a mobile-lid *** stagnant lid scenarios of crust formation,if operative,must have co-existed or alternated with mobile-lid regimes by 3800 ma.

关键词： eoarchean fluid-fluxing Plate tectonics Suprasubduction crustal evolution

Mulberry Biomass-Derived Nanomedicines Mitigate colitis through Improved Inflamed Mucosa Accumulation and Intestinal Microenvironment Modulation

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Research 2024年第1期2023卷 791-807页

作者： Wenjing Yang Ya ma Haiting Xu Zhenhua Zhu Jiaxue Wu cheng Xu Wei Sun erhu Zhao Min Wang Rui l.Reis Subhas c.Kundu Xiaoxiao Shi Bo Xiao State Key laboratory of Silkworm Genome Biology College of SericultureTextileand Biomass SciencesSouthwest UniversityChongqing 400715China chongqing Key laboratory of Soft-matter material chemistry and function manufacturing Faculty of Materials and EnergySouthwest UniversityChongqing 400715China Department of Gastroenterology The First Affiliated Hospital of Nanchang UniversityNanchang 330006China Bs Research Group I3Bs—Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkBarco 4805-017GuimaraesPortugal IcVS/3B’s-PT Government Associate laboratory BragaGuimarãesPortugal

The therapeutic outcomes of conventional oral medications against ulcerative colitis(Uc)are restricted by inefficient drug delivery to the colitis mucosa and weak capacity to modulate the inflammatory ***,a fluorinated pluronic(fP127)was synthesized and employed to functionalize the surface of mulberry leaf-derived nanoparticles(MlNs)loading with resveratrol nanocrystals(RNs).The obtained fP127@RN-MlNs possessed exosome-like morphologies,desirable particle sizes(around 171.4 nm),and negatively charged surfaces(−14.8 mV).The introduction of fP127 to RN-MlNs greatly improved their stability in the colon and promoted their mucus infiltration and mucosal penetration capacities due to the unique fluorine effect.

关键词： fluorine sizes Biomass

STcf conceptual design report (Volume 1): Physics & detector

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frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.c.Ai l.P.An R.Aliberti Q.An X.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar I.Boyko Z.H.Bu f.M.cai H.cai J.J.cao Q.H.cao X.cao Z.cao Q.chang K.T.chao D.Y.chen H.chen H.X.chen J.f.chen K.chen l.l.chen P.chen S.l.chen S.M.chen S.chen S.P.chen W.chen X.chen X.f.chen X.R.chen Y.chen Y.Q.chen H.Y.cheng J.cheng S.cheng T.G.cheng J.P.Dai l.Y.Dai X.c.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding l.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du l.M.Duan D.epifanov Y.l.fan S.S.fang Z.J.fang G.fedotovich c.Q.feng X.feng Y.T.feng J.l.fu J.Gao Y.N.Gao P.S.Ge c.Q.Geng l.S.Geng A.Gilman l.Gong T.Gong B.Gou W.Gradl J.l.Gu A.Guevara l.c.Gui A.Q.Guo f.K.Guo J.c.Guo J.Guo Y.P.Guo Z.H.Guo A.Guskov K.l.Han l.Han M.Han X.Q.Hao J.B.He S.Q.He X.G.He Y.l.He Z.B.He Z.X.Heng B.l.Hou T.J.Hou Y.R.Hou c.Y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu Y.c.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia H.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao H.J.Jing X.l.Kang X.S.Kang B.c.Ke M.Kenzie A.Khoukaz I.Koop e.Kravchenko A.Kuzmin Y.lei e.levichev c.H.li c.li D.Y.li f.li G.li G.li H.B.li H.li H.N.li H.J.li H.l.li J.M.li J.li l.li l.li l.Y.li N.li P.R.li R.H.li S.li T.li W.J.li X.li X.H.li X.Q.li X.H.li Y.li Y.Y.li Z.J.li H.liang J.H.liang Y.T.liang G.R.liao l.Z.liao Y.liao c.X.lin D.X.lin X.S.lin B.J.liu c.W.liu D.liu f.liu G.M.liu H.B.liu J.liu J.J.liu J.B.liu K.liu K.Y.liu K.liu l.liu Q.liu S.B.liu T.liu X.liu Y.W.liu Y.liu Y.l.liu Z.Q.liu Z.Y.liu Z.W.liu I.logashenko Y.long c.G.lu J.X.lu N.lu Q.f.lü Y.lu Y.lu Z.lu P.lukin f.J.luo T.luo X.f.luo Y.H.luo H.J.lyu X.R.lyu J.P.ma P.ma Y.ma Y.M.ma f.maas S.malde D.matvienko Z.X.Meng R.Mitchell A.Nefediev Y.Nefedov S.l.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan e.Passemar Y.P.Pei H.P.Peng l.Peng X.Y.Peng X.J.Peng K.Peters S.Pivovarov e.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian c.f.Qiao J.J.Qin J.J.Qin l.Q.Qin X.S.Qin T.l.Qiu J.Rademacker c.f.Redmer H.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia cAS Key laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China cavendish laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom central china Normal University Wuhan 430079China central South University Changsha 410083China china University of Geosciences Wuhan 430074China china University of Mining and Technology Xuzhou 221116China École Polytechnique fédérale de lausanne(ePfl) LausanneSwitzerland fudan University Shanghai 200433China Goethe University frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of Technology Hefei 230601China Helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High energy Physics center Chung-Ang UniversitySeoul 06974Korea Higher School of economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of Science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced Science facilities Shenzhen 518107China Institute of High energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility(STcf)is an electron–positron collider proposed by the chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STcf will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BePcII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STcf project in china is under development with an extensive R&D *** document presents the physics opportunities at the STcf,describes conceptual designs of the STcf detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STcf detector conceptual design

Modularized sulfur storage achieved by 100% space utilization host for high performance lithium-sulfur batteries

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chinese chemical letters 2024年第4期35卷 237-243页

作者： Jun Jiang Tong Guo Wuxin Bai Mingliang liu Shujun liu Zhijie Qi Jingwen Sun Shugang Pan Aleksandr l.Vasiliev Zhiyuan ma Xin Wang Junwu Zhu Yongsheng fu Key laboratory for Soft chemistry and functional materials of Ministry of education Nanjing University of Science and TechnologyNanjing 210094China changzhou Institute of Technology Changzhou 213032China Shubnikov Institute of crystallography Russian Academy of SciencesLeninskii pr.59Moscow 119333Russia Jiangsu Pylon Battery co. Ltd.Yangzhou 211400China

Popularization of lithium-sulfur batteries(lSBs) is still hindered by shuttle effect and volume ***, a new modularized sulfur storage strategy is proposed to solve above problems and accomplished via employing 100% space utilization host material of cobalt loaded carbon nanoparticles derived from ZIf-67. The modular dispersed storage of sulfur not only greatly increases the proportion of active sulfur,but also inhibits the occurrence of volume expansion. Meanwhile, 100% space utilization host material can greatly improve the conductivity of the cathode, provide a larger electrolyte wetting interface and effectively suppress the shuttle effect. Moreover, loaded cobalt particles have high catalytic activity for electrochemical reaction and can effectively improve the redox kinetics. The cell with new cathode host material carbonized at 650 ℃(ZIf-67(650 ℃)) exhibits superior rate performance and can maintain a high specific capacity of 950 m Ah/g after 100 cycles at 0.2 c, showing a good cycle stability.

关键词： Modularized sulfur storage Space utilization cathode host material ZIf-67 lithium-sulfur batteries

Ground-based and additional science support for SMIle

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earth and Planetary Physics 2024年第1期8卷 275-298页

作者： J.A.carter M.Dunlop c.forsyth K.Oksavik e.Donovon A.Kavanagh S.e.Milan T.Sergienko R.c.fear D.G.Sibeck M.connors T.Yeoman X.Tan M.G.G.T.Taylor K.McWilliams J.Gjerloev R.Barnes D.D.Billet G.chisham A.Dimmock M.P.freeman D.-S.Han M.D.Hartinger S.-Y.W.Hsieh Z.-J.Hu M.K.James l.Juusola K.Kauristie e.A.Kronberg M.lester J.manuel J.matzka I.Mccrea Y.Miyoshi J.Rae l.Ren f.Sigernes e.Spanswick K.Sterne A.Steuwer T.Sun M.-T.Walach B.Walsh c.Wang J.Weygand J.Wild J.Yan J.Zhang Q.-H.Zhang Planetary Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton laboratory Space Science Technology Facilities CouncilOxfordshireUK School of Space and environment Beihang UniversityBeijing 100191China Key laboratory of Space environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and climate Physics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Physics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Physics KirunaSweden West Highfield campus University of SouthamptonUniversity RoadSO171BJUK Goddard Space flight center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada eSTec European Space AgencyNetherlands University of Saskatchewan SaskatoonCanada The Johns Hopkins University Applied Physics laboratory LaurelMarylandUSA Swedish Institude of Space Physics UppsalaSE 75121Sweden Tongji University Shanghai 200092China center for Space Plasma Physics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of china Shanghai 200136China finnish Meteorological Institute(fMI) Finland Department of earth and environmental Sciences(Geophysics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany canadian Space Agency MontrealCanada GfZ German Research centre for Geosciences PotsdamGermany Nagoya University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science center Chinese Academy SciencesBeijing 100190China Arctic Geophysics University Centre in Svalbard

The joint european Space Agency and chinese Academy of Sciences Solar wind magnetosphere Ionosphere link explorer(SMIle)mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,and simultaneously monitor the auroral response of the Northern Hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety of cadences by additional ground-based and space-based instruments will enable a much greater scientific impact beyond the original goals of the SMIle ***,we describe current community efforts to prepare for SMIle,and the benefits and context various experiments that have explicitly expressed support for SMIle can offer.A dedicated group of international scientists representing many different experiment types and geographical locations,the Ground-based and Additional Science Working Group,is facilitating these *** include constructing an online SMIle Data fusion facility,the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community engagement with the SMIle mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SMIle conjunctions missions

氮碳包封fe_(3)c纳米颗粒作为高效富氧还原电催化剂

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Science china materials 2024年第3期67卷 762-770页

作者：汪翠萍李智雷杰李松 Stijn f.l.Mertens 胡劲松 School of chemical engineering Anhui Province Key Laboratory of Specialty PolymersAnhui University of Science and TechnologyHuainan 232001China Department of chemistry Energy Lancaster and Materials Science LancasterLancaster UniversityLancaster LA14YBUnited Kingdom Institute of energy Hefei Comprehensive National Science CenterHefei 230031China

高活性MOf基催化剂的设计和合成为促进动力学不利的氧还原反应(ORR)过程开辟了新的途径.本研究通过在ZIf-8前驱体表面涂覆二茂铁甲酸,然后进行两步炭化工艺,设计和制备了一种具有新型结构的高效电催化剂,以提高ORR性能.两步炭化过程对... 详细信息

高活性MOf基催化剂的设计和合成为促进动力学不利的氧还原反应(ORR)过程开辟了新的途径.本研究通过在ZIf-8前驱体表面涂覆二茂铁甲酸,然后进行两步炭化工艺,设计和制备了一种具有新型结构的高效电催化剂,以提高ORR性能.两步炭化过程对于将热解fe_(3)c纳米颗粒封装到碳纳米管(cNTs)中以及将fe单原子隔离到N掺杂碳(Nc)基体上至关重要.此外,fe元素的相对含量对优化催化剂的ORR性能至关重要.所制得fe_(3)c@cNTs/Nc-M催化剂结构先进,在碱性溶液中表现出良好的长期稳定性和电催化ORR性能,其半波电位和极限电流分别达到0.941 V和6.31 ma cm^(-2).此外,该电催化剂在甲醇溶液中具有较强的耐受性和良好的稳定性.fe_(3)c@cNTs/Nc-M锌空气电池(ZAB)具有1.525 V的开路电位,420 ma cm^(-2)时的峰值功率密度为348 mW cm^(-2),10 ma cm^(-2)时的最大容量为843 ma h g_(Zn)^(-1).因此,这种合成策略为构建具有有效和稳定的ORR性能的MOf基电催化材料提供了一条有效途径.

关键词： metal-organic frameworks carbon nanotubes N-doped carbon matrix oxygen reduction reaction Zn-air battery

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