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THEORETICAL XUV SPECTRA FROM CARBON-LIKE COBALT IONS BY RELATIVISTIC CONFIGURATION INTERACTION CALCULATION

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Chinese Physics Letters 1990年第5期7卷 216-218页

作者： zou yu LI Jiaming Institute of Applied Physics and Computation Mathmatics Beijing 100080 Institute of Physics Academia SinicaBeijing 100080

Allowed Δn=0 transitions of highly ionized metal atoms,which may appear in the solar spectra as well as in spectra from the high-temperature tokamak plasmas,lie in the extreme vacuum UV(XUV) region,100A≤λ≤*** we report our theoretical calculation of the Δn=0 transitions of C-like cobalt ions;it is in good agreement with the experimental *** theoretical calculations of the transition wave lengths and their oscillator strengths should be very helpful to identify the XUV spectra.

关键词： spectra measurement transitions

Cold Spray Additive Manufacturing:Microstructure Evolution and Bonding Features

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Accounts of Materials Research 2021年第11期2卷 1071-1081页

作者： yu zou Department of Materials Science and Engineering University of TorontoTorontoON M5S 3E4Canada

CONSPECTUS:Most metal additive manufacturing(AM)methods involve the melting or sintering of feedstock powder or wire using an energy source(laser,electron beam,or electric arc).Solid-state AM,sometimes also known as non-beam-based AM,is a process in which the deposited material does not melt and is built up layer-by-layer,typically through severe plastic *** considered to be a coating technique,by virtue of its high deposition rate,cold spray additive manufacturing(CSAM)is attractive as a solid-state AM *** the CSAM process,metal powder particles are impacted onto a substrate at a supersonic velocity and relatively low *** CSAM process reduces or eliminates many problems associated with melting or beambased AM methods,making the CSAM technically attractive for a wide range of applications,such as in the aerospace,automobile,marine,biomedical,machinery,and energy sectors.

关键词： Microstructure coating attractive

Relativistic Multichannel Theory:Theoretical Studies of Excited Energy Structure of Ar Atom

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Chinese Physics Letters 1995年第6期12卷 351-354页

作者： TONG Xiaomin zou yu LI Jiaming Institute of Physics Academia SinicaBeijing 100080

We here present a relativistic multichannel theory which can be regarded as an extension of traditional configuration interaction theories by including continuum configuration *** relativistic multichannel theory aims directly to calculate the compact set of physical parameters(μ_(α),U_(iα)) in multichannel quantum defect *** Ar atom as an example,we compare our calculated orbital energies with traditional configuration interaction calculations as well as experimental measurements.

关键词： theory. configuration relativistic

Properties and processing technologies of high-entropy alloys

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Materials Futures 2022年第2期1卷 9-20页

作者： Xuehui Yan yu zou Yong Zhang Beijing Advanced Innovation Center of Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Department of Materials Science and Engineering University of Toronto184 College StTorontoON M5S 3E4Canada

High-entropy alloys (HEAs) are emerging materials that are developed based on entropy, anddraw significant attention for the potential to design their chemical disorder to bring outdifferent structural and physical characteristics. Over the past two decades, significant salientefforts have been conducted to explore many unique and useful properties of HEAs, such asovercoming the strength–ductility trade-off, outstanding thermal stability, and excellent lowtemperature plasticity. Here, we review the key research topic of HEAs in the following threeaspects: (a) performance advantages and composition design, (b) performance-driven HEAs and(c) fabrication process-driven HEAs. Towards their industrial applications, our article reviews alarge range of methods to synthesise, fabricate and process HEAs. We also discuss the currentchallenges and future opportunities, mainly focusing on performance breakthroughs in HEAs.

关键词： high-entropy alloys review order and disorder properties processing

Dielectronic Recombination on He+ with Non-isolated Resonance Approach

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Chinese Physics Letters 2000年第2期17卷 96-98页

作者： zou yu ZHAO LI-Bo FANG quan-yu Institute of Applied Physics and Computational Mathematics Beijing 100088 Department of Applied Physics Beijing University of Aeronautics and AstronauticsBeijing 100083

Based on the relativistic multichannel theory, a non-isolated resonance approach has been developed to calculate the cross sections of dielectronic recombination on He+ for △n=1 and 2 transitions. A first order approximation is adopted for the radiative process. The convolved cross sections for the n≤3 states in both transitions are in good agreement with those of the observations. It is shown that the l-dependence of the field ionization and the radiative decay during the time-of-flight affect significantly the measurement of the cross sections near the initial state of the field ionization.

关键词： process transitions radiative

Relativistic Multichannel Theory:Scaling Behavior of Multichannel Quantum Defect Theory Parameters(μ_(α),U_(iα)) Along the Ne-Like Iso-electronic Sequence

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Chinese Physics Letters 1996年第4期13卷 269-272页

作者： zou yu TONG Xiao-min LI Jia-ming Institute of Physics Chinese Academy of SciencesBeijing 100080 Institute of Applied Physics and Computational Mathematics Beijing 100088

The compact physical parameters(μ_(α),U_(iα))in multichannel quantum defect theory(MQDT)can be directly calculated with relativistic multichannel theory(RMCT).Here we report a systematic study of the MQDT parameters(fiay Uia)with RMCT along the Ne-like iso-electronic sequence(including Ca^(10+),Fe^(16+),Ge^(22+),Ag^(37+) ions).We find that the physical parameters(μ_(α),U_(iα))show a very interesting scaling behavior along the iso-electronic sequence.

关键词： electronic MQDT scaling

Relativistic Multichannel Theory:Doubly Excited States of Atomic Helium

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Chinese Physics Letters 1998年第3期15卷 175-177页

作者： zou yu FANG Quan-yu LI Jia-ming Institute of Applied Physics and Computational Mathematics Beijing 100088 Center of Atomic and Molecular Sciences Department of PhysicsTsinghua UniversityBeijing 100084 Institute of Physics Chinese Academy of SciencesBeijing 100080

In the report,the recently developed relativistic multichannel theory(RMCT)is a full relativistic non-perturbative method and can be applied to the high-Z atomic ions which have given rise to some recent interests because of researches of inertial confinement fusion and x-ray *** on the RMCT,the positions and widths of doubly excited sp2n^(+),sp2n^(-),and 2pnd ^(1)P_(1) resonances are calculated,which are in agreement with the recent experimental *** sets up a sound foundation on which the RMCT should be applicable to high Z atomic ions.

关键词： relativistic excited positions

Magnetron co-sputtering synthesis and nanoindentation studies of nanocrystalline(TiZrHf)_(x)(NbTa)_(1–x)high-entropy alloy thin films

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Nano Research 2022年第6期15卷 4873-4879页

作者： Changjun Cheng Xiaofu Zhang Michel J.R.Haché yu zou Department of Materials Science and Engineering University of TorontoTorontoOntario M5S 3E4Canada State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology and Center for Excellence in Superconducting ElectronicsChinese Academy of Sciences(CAS)Shanghai 200050China

Refractory high-entropy alloys(HEAs)possess many useful properties such as high strength and high-temperature *** far,most studies on refractory HEAs have been limited to a few well-known compositions and on their coarse-grain bulk *** we fabricate nanocrystalline(TiZrHf)_(x)(NbTa)_(1−x)HEA thin films with a large range of compositions(x=0.07–0.90)by the direct current(DC)magnetron co-sputtering technique and measure their mechanical properties using the nanoindentation *** the as-deposited HEA thin films show a solid-solution body-centered cubic(bcc)*** the compositional ratio(x)increases,the elastic modulus decreases from 153 to 123 GPa,following the trend of the rule of *** x increases,the hardness first decreases from 6.5 GPa(x=0.07)to the lowest value(4.6 GPa,x=0.48)and then increases to the highest value(7.1 GPa,x=0.90),showing a concave *** change in hardness might be attributed to the combinational influence caused by the atomic size and modulus effects,as well as the texture *** authors also propose a few open questions for future studies on this and related HEA systems.

关键词： high-entropy alloys nanocrystalline alloys refractory metals thin films magnetron co-sputtering nanoindentation

Theoretical Calculation of Dielectronic-Recombination Cross Section for Hydrogen-Like Argon

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Chinese Physics Letters 1995年第9期12卷 530-532页

作者： WANG Jianguo zou yu DONG Chenzhong LI Jiaming Institute of Physics Academia SinicaBeijing 100080 Department of Physics Northwestern Normal UniversityLanzhou 730070

Dielectronic-recombination cross sections of hydrogen-like argon are calculated conveniently by our simplified relativistic configuration-interaction *** results for the KLL,KLM,KLN,and KLO resonances are in good agreement with experimental measurement within a few *** methods can provide various dielectronic-recombination rates which can satisfy the need for relevant applications.

关键词： method. satisfy simplified