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Microstructure evolution of depleted uranium impacted by steel projectile at velocity of 50m/s

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Transactions of Nonferrous Metals Society of China 2017年第5期27卷 1043-1051页

作者： Dong-li ZOU Ya-kun GUO Mao-bing SHUAI Da-wu XIAO Institute of Materials China Academy of Engineering Physics Jiangyou 621907 China

The deformed microstructure evolution of depleted uranium impacted by steel projectile at a velocity of50m/s was investigated by means of confocal laser scanning microscope,electron backscatter diffraction,transmission electron microscope and indenter *** experimental results showed that the spherical cap crater was formed in depleted uranium target impacted by steel projectile,and the diameter and depth of the impacted crater were5.45and1.01mm,*** crater rim to deep matrix,four deformed zones were classified,including twin fragmentation zone,high density deformation twin zone,low density deformation twin zone and matrix *** was considered as the dominant plastic deformation mechanism of depleted uranium subjected to impact *** twinning,the dislocation slipping also played an important role to accommodate the plastic ***,the deformed microstructure evolution of depleted uranium under high velocity impact was proposed.

关键词： depleted uranium steel projectile dynamic deformation microstructure evolution twinning

Galvanic Corrosion between depleted uranium and 45 Steel

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Galvanic Corrosion between Depleted Uranium and 45 Steel

Dinitrogen cleavage and hydrogenation to ammonia with a uranium complex

中国材料大会2012

作者： Zhen Pu Qingfu Wang Maobing Shuai Dingmu Lang Science and Technology on Surface Physics and Chemistry Laboratory China Academy of Engineering Physics

ISBN: (纸本)9783037856093

Self-corrosion and galvanic corrosion of depleted uranium and 45 steel were studied by electrochemical analyzing technologies. Corrosion products were analyzed by Energy-dispersive spectroscopy （EDS）. The results showed that, in the 3.5wt.%NaCl solution, DU acted as anode with an accelerated corrosion rate, and 45 steel acted as cathode during the process of galvanic corrosion for DU/45 couple. The galvanic potential and current density of the DU/45 couple were around -770mV and 12.5μA/cm -2 , respectively.

关键词： Galvanic corrosion depleted uranium 45 steel .

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National Science Review 2023年第2期10卷 165-173页

作者： Xiaoqing Xin Iskander Douair Yue Zhao Shuao Wang Laurent Maron Congqing Zhu State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing University School of Medicine and Holistic Integrative Medicine Nanjing University of Chinese Medicine LPCNO CNRS and INSA Université Paul Sabatier State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow University

The Haber-Bosch process produces ammonia（NH3） from dinitrogen（N2） and dihydrogen（H2）,but re quires high temperature and *** iron-based catalysts were exploited in the current industrial Haber-Bosch process,uranium-based materials served as effective catalysts for production of NH3from *** some molecular uranium complexes are known to be capable of combining with N2,further hydrogenation with H2forming NH3has not been reported to ***,we describe the first example of N2cleavage and hydrogenation with H2to NH3with a molecular uranium *** N2cleavage product contains three uranium centers that are bridged by three imido μ2-NH ligands and one nitridoμ3-N *** experiments with15N demonstrate that the nitrido ligand in the product originates from *** of the N2-cleaved complex with H2or H+forms NH3under mild conditions.A synthetic cycle has been established by the reaction of the N2-cleaved complex with trimethylsilyl *** isolation of this trinuclear imido-nitrido product implies that a multi-metallic uranium assembly plays an important role in the activation of N2.

关键词： N_2 activation NH_3 formation depleted uranium uranium azide actinide coordination chemistry

Measurement and analysis of f ission rates in a spherical mockup of uranium and polyethylene

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Chinese Physics C 2013年第12期37卷 22-26页

作者：朱通华杨朝文鹿心鑫刘荣韩子杰蒋励王枚 Institute of Nuclear Science and Technology Sichuan University Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics

Measurements of the reaction rate distribution were carried out using two kinds of Plate Micro Fission Chamber （PMFC）. The first is a depleted uranium chamber and the second an enriched uranium chamber. The material in the depleted uranium chamber is strictly the same as the material in the uranium assembly. With the equation solution to conduct the isotope contribution correction, the fission rate of 238U and 235U were obtained from the fission rate of depleted uranium and enriched uranium. Then, the fission count of 238U and 235U in an individual uranium shell was obtained. In this work, MCNP5 and continuous energy cross sections ENDF/BV.0 were used for the analysis of fission rate distribution and fission count. The calculated results were compared with the experimental ones. The calculation of fission rate of DU and EU were found to agree with the measured ones within 10% except at the positions in polyethylene region and the two positions near the outer surface. Because the fission chamber was not considered in the calculation of the fission counts of 238U and 235U, the calculated results did not agree well with the experimental ones.

关键词： fission rate depleted uranium polyethylene neutronics analysis

Microstructure and mechanical properties of fine grained uranium prepared by ECAP and subsequent intermediate heat treatment

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Transactions of Nonferrous Metals Society of China 2020年第10期30卷 2749-2756页

作者： Dong-li ZOU Li-feng HE Da-wu XIAO Ya-wen ZHAO Zhi-cong QIU Chao LU Fan LIU Institute of Materials China Academy of Engineering PhysicsJiangyou 621907China

The microstructure and mechanical properties of fine grained uranium prepared by equal channel angular pressing(ECAP)and subsequent intermediate heat treatment were investigated systematically by the confocal laser scanning microscope(CLSM),electron backscatter diffraction(EBSD)and split Hopkinson pressure bar(SHPB).The results show that the initial coarse grained uranium was refined from about 1000 to 6.5μm prepared by ECAP at 3 passes and subsequent heat treatment,and the corresponding dynamic yield strength increased from 135 to 390 *** the ECAPed uranium samples,the relationship between grain size and yield strength could be described by classical Hall−Petch relationship,and the fitting Hall−Petch relationship for the fine grained uranium samples prepared by ECAP was drawn.

关键词： depleted uranium equal channel angular pressing(ECAP) heat treatment grain refinement severe plastic deformation

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Natural Science 2013年第4期5卷 463-477页

作者： Nadhir Al-Ansari Roland Pusch Sven Knutsson Department of Civil Environmental and Natural Resources EngineeringLulea University of TechnologyLuleaSweden

Iraq experienced two devastating wars in 1991 and 2003, during which massive amounts of new weapons and sophisticated manufactured nuclear weapons were used called depleted uranium (DU). As a consequence of the radioactive contamination;the humans are suffering from various disease like cancer and the environment is polluted. In practice, there is no strategy and/ or national program, not even well thought out plans and scientific personnel and technical equipment required to clean Iraq of these wastes. Reviewing the geological, topographical and hydrological data, it had been noticed that Umm Chaimin depression is a good candidate site to dump all contaminated radioactive scrap and soil. The suggested design of the landfill will ensure safe containment of the waste for hundreds of thousands of years even if significant climatic changes will take place.

关键词： Iraq Umm Chaimin depleted uranium Landfill Site Selection Criteria

Nuclear Power and Radioactive Contamination

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Journal of Environmental Protection 2014年第3期5卷 175-180页

作者： Nils-Axel Morner Paleogeophysics&Geodynamics StockholmSweden

Nuclear power was designed to produce electric power. Each part of the chain from uranium mining to handling of the waste is linked to serious contamination risks, however. uranium mining is generally linked to local to regional contamination. The fuel production also produces depleted uranium at a ratio of 1:7. The reactors are operating under danger of accidents. Numerous minor accidents and endless temporary shut-downs are occasionally mixed with disastrous accidents. The Chernobyl (1986) and Fukushima (2011) accidents are notorious. The radioactive contamination from those accidents is still incomprehensible and will keep serious destructions of the environment for centuries to come. The handling of the high-level nuclear waste remains unsolved. Methods proposed in Sweden, Finland and France seem likely to lead to disastrous radioactive contaminations in the future. The only way out of this dilemma seems to be a disposal where the waste, though effectively sealed-off in the bedrock, remains accessible and controllable. At present, the “cost & benefit” balance seems strongly tilted over to the “far too costly side”, however.

关键词： Nuclear Power uranium Mining depleted uranium Nuclear Accidents Waste Handling The DRD Method

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专题报告-S6重金属毒性

中国药理学与毒理学杂志 2006年第3期20卷 177-178页

作者： ZHU Mao-Xiang YANG Zhi-Hua CAO Zhen-Shan PAN Xiu-Jie YU Shi ZHOU Xiao-Ying ZHOU Ping-Kun Department of Radiation Toxicology and Oncology Beijing Institute of Radiation Medicine Beijing100850 China

The aim is to investigate the health effects of depleted uranium（DU） material and the protective role of DMSO. Exposure model of rat was established by inhaling DU aerosol.

关键词： Heavy Metal Toxicity depleted uranium DMSO