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Chemo-mechanical coupling effect in the high-temperature oxidation of metal materials: A review

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Science China(Technological Sciences) 2019年第8期62卷 1246-1254页

作者： wang hailong YU WenShan SHEN ShengPing School of Civil Engineering Chang 'an University Xi'an 710061 China State Key Laboratory for Strength and Vibration of Mechanical Structures Shaanxi Engineering Laboratory for Vibration Control of Aerospace Structures School of Aerospace Engineering Xi'an Jiaotong University Xi'an 710049 China

The metal materials are susceptible to be oxidized when they are exposed to the complex and harsh environments, especially at the elevated temperature. The development of corresponding chemo-mechanical coupling theory is indispensable in theoretically and numerically predicting the material properties reduction and failures due to the oxidation. In this paper, we review the historical sketch of the coupling theory of chemical reactions and mechanics in the high-temperature oxidation of metal materials. The oxidation results in the stress generation while the generated stress in turn affects the chemical reaction rate and the diffusion process of the reactants. It is therefore a complex chemo-mechanical coupling problem. This review begins with the discussion of the diffusion-controlled oxidation, and then discusses the stress-dependent diffussion during the oxidation and the oxide growth induced stress, and ends with the discussion of interaction between chemical reactions and stress. This review of chemo-mechanical coupling literature is not exhaustive;we review much of the fundamental literature and draw comparisons of coupling theory development in the filed of metal oxidation.

关键词： oxidation diffusion growth stress chemo-mechanical coupling metal

Quantum heat engine cycle working with a strongly correlated electron system

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Science China(Physics,Mechanics & Astronomy) 2012年第5期55卷 792-797页

作者： wang hailong PAN Hui wang RongMing Department of Physics and State Key Laboratory of Software Development Environment Beijing University of Aeronautics and AstronauticsBeijing 100191China Key Laboratory of Micro-nano Measurement-Manipulation and Physics(Ministry of Education)and Department of Physics Beijing University of Aeronautics and AstronauticsBeijing 100191China

A new model of a quantum heat engine （QHE） cycle is established, in which the working substance consists of an interacting electrons system. One of our purposes is to test the validity of the second law of thermodynamics by this model, which is more general than the spin-1/2 antiferromagnetic Heisenberg model since it would recover the spin model when the on-site Coulomb interaction U is strong enough. On the basis of quantum mechanics and the first law of thermodynamics, we show no violation of the second law of thermodynamics during the cycle. We further study the performance characteristics of the cycle by investigating in detail the optimal relations of efficiency and dimensionless power output. We find that the efficiency of our engine can be expressed as η = t22/t21 in the large-U limit, which is valid even for a four sites QHE.

关键词： quantum heat engine strongly correlated electrons Hubbard model

Quantum phase transition in quarter-filled nanoclusters of manganite induced by element substitution at B site

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Science China(Physics,Mechanics & Astronomy) 2011年第7期54卷 1277-1282页

作者： wang hailong wang RongMing wang YuGang TIAN GuangShan School of Physics Peking University Beijing 100871 China Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education) Department of Physics Beijing University of Aeronautics & Astronautics Beijing 100191 China

In the present paper,we study the effect of element substitution for quarter-filled nanoclusters of perovskite manganite by introducing Jahn-Teller type of perturbation interaction to the double-exchange *** the unrestricted real-space Hartree-Fock approximation method we find that,the Jahn-Teller electron-phonon interaction plays the central role in producing the phase transition from ferromagnetic phase to CE type antiferromagnetic *** only the Jahn-Teller interaction benefits antiferromagnetic correlation,it also increases the charge density order *** theoretical results provide a guidance to predict the properties and modify the composition of particles of perovskite manganite under nano-scale.

关键词： manganite charge ordered phases antiferromagnetic correlation

Effect of Icariin on apoptosis and expression of Fas,Fas ligand,B cell lymphoma,and Bcl-2-associated X protein in CD4＋ T lymphocytes from patients with ankylosing spondylitis

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Journal of Traditional Chinese Medicine 2017年第2期37卷 207-213页

作者： wang hailong Jiang Quan Feng Xinghua Division of Rheumatology Guang'anmenHospital China Academy of Chinese Medical Science Beijing 100053 China Basic Medical School Guiyang University of Chinese Medicine Guiyang 550025 China The SecondAffiliated Hospital Guiyang University of Chinese MedicineGuiyang 550003 China Division of Rheurnatology Guang'anrnen Hospital China Academy of Chinese MedicalScience Beijing 100053 China

OBJECTIVE:To investigate the effects of icariin on apoptosis and the expression of Fas, Fas ligand(Fas L), B cell lymphoma(Bcl-2), and Bcl-2-associated X protein(Bax) in CD4+ T lymphocytes from patients with ankylosing ***:Primary cultures of peripheral blood CD4+ T lymphocytes were established and treated with icariin at high, medium, and low doses(0.5,0.25, and 0.125 mg/mL).Sulfasalazine treated and helthy cells were used as *** of treated cells was determined by flow *** transcription polymerase chain reaction and enzyme-linked immunosorbent assays were used to determine the effects of icariin on the expression of Fas, Fas L, Bcl-2, and *** activity of caspase 8 and caspase 3 was determined by a colorimetric ***:The m RNA and protein expression of Fas,and activity of caspase 8 and caspase 3 in CD4+ T lymphocytes were increased by icariin(P < 0.05).Conversely, the m RNA and protein expression of Bcl-2 was decreased(P < 0.05).The expression of Fas L and Bax were not significantly different between *** proapoptotic effects of icariin were ***:Icariin induces the apoptosis of CD4 + T cells from patients with AS comparing to normal ***, the induction of apoptosis may be the likely mechanism of action of icariin's antirheumatics activities.

关键词： Spondylitis ankylosing Fas Fas Ligand protein Lymphoma B-Cell Bcl-2-associated X protein CD4-positive T-lymphocytes Apoptosis Icariin

Enhancement of the Curie temperature of ferromagnetic semiconductor(Ga,Mn)As

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Science China(Physics,Mechanics & Astronomy) 2013年第1期56卷 99-110页

作者： wang hailong CHEN Lin ZHAO JianHua State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences

In this review article,we review the progress made in the past several years mainly regarding the efforts devoted to increasing the Curie temperature(T C) of(Ga,Mn)As,which is most widely considered as the prototype ferromagnetic *** Mn doping,nanostructure engineering and post-growth annealing which increase T C are described in detail.

关键词： magnetic semiconductors magnetic properties of nanostructures magnetotransport phenomena molecular-beam epitaxy

Focused ion beam built-up on scanning electron microscopy with increased milling precision

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Science China(Physics,Mechanics & Astronomy) 2012年第4期55卷 625-630页

作者： LUO Hu wang hailong CUI YiMin wang RongMing Key Laboratory of Micro-nano Measurement-manipulation and Physics(Ministry of Education) Department of PhysicsBeijing University of Aeronautics and AstronauticsBeijing 100191China

In this work,a focused ion beam(FIB)-scanning electron microscopy(SEM) dual beam system was successfully built by integrating a FIB column and a graphics generator onto a ***-time observation can be realized by SEM during the process of FIB *** kinds of graphics at nanoscale regime,such as lines,characters,and pictures,were achieved under the control of graphics ***,the FIB milling line width can be reduced nearly 27% by the introduction of simultaneous electron beam,and a line width as small as 10 nm was *** numerical analysis indicates that the significant improvement on line width is induced by the Coulomb interaction between the electrons and ions.

关键词： FIB-SEM dual beam system milling precision increase numerical simulation

Modulation of hot regions in waveguide-based evanescent-field-coupled localized surface plasmons for plasmon-enhanced spectroscopy

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Photonics Research 2017年第5期5卷 518-526页

作者： hailong wang YUYANG wang YI wang WEIQING XU SHUPING XU State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical Chemistry Jilin University

Coupling efficiency between the localized surface plasmons(LSPs) of metal nanoparticles(NPs) and incident light dominates the sensitivities of plasmon-based sensing spectroscopies and imaging techniques, e.g., surfaceenhanced Raman scattering(SERS) spectroscopy. Many endogenous features of metal NPs(e.g., size, shape,aggregation form, etc.) that have strong impacts on their LSPs have been discussed in detail in previous ***, the polarization-tuned electromagnetic(EM) field that facilitates the LSP coupling is fully *** analyses on waveguide-based evanescent fields(WEFs) coupled with the LSPs of dispersed silver nanospheres and silver nano-hemispheres are presented and the applicability of the WEF-LSPs to plasmon-enhanced spectroscopy is discussed. Compared with LSPs under direct light excitation that only provide 3–4 times enhancement of the incidence field, the WEF-LSPs can amplify the electric field intensity about 30–90 times(equaling the enhancement factor of 10~6–10~8 in SERS intensity), which is comparable to the EM amplification of the SERS"hot spot" effect. Importantly, the strongest region of EM enhancement around silver nanospheres can be modulated from the gap region to the side surface simply by switching the incident polarization from TM to TE, which widely extends its sensing applications in surface analysis of monolayer of molecule and macromolecule detections. This technique provides us a unique way to achieve remarkable signal gains in many plasmon-enhanced spectroscopic systems in which LSPs are involved.

关键词： NP Ag Modulation of hot regions in waveguide-based evanescent-field-coupled localized surface plasmons for plasmon-enhanced spectroscopy WEF

Porous high-entropy rare-earth phosphate(REPO_(4),RE=La,Sm,Eu,Ce,Pr and Gd)ceramics with excellent thermal insulation performance via pore structure tailoring

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1651-1658页

作者： Peixiong Zhang Enhui wang Jingjing Liu Tao Yang hailong wang Xinmei Hou Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China Liaoning Academy of Materials Shenyang 110000China Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting University of Science and Technology BeijingBeijing 100083China School of Materials Science Engineering Zhengzhou UniversityZhengzhou 450001China

Thermal insulation materials play an increasingly important role in protecting mechanical parts functioning at high *** this study,a new porous high-entropy(La_(1/6)Ce_(1/6)Pr_(1/6)Sm_(1/6)Eu_(1/6)Gd_(1/6))PO_(4)(HE(6RE_(1/6))PO_(4))ceramics was prepared by combining the high-entropy method with the pore-forming agent method and the effect of different starch contents(0–60vol%)on this ceramic properties was systematically *** results show that the porous HE(6RE_(1/6))PO_(4)ceramics with 60vol%starch exhibit the lowest thermal conductivity of 0.061 W·m^(-1)·K^(-1)at room temperature and good pore structure stability with a linear shrinkage of approximately1.67%.Moreover,the effect of large regular spherical pores(>10μm)on its thermal insulation performance was discussed,and an optimal thermal conductivity prediction model was *** superior properties of the prepared porous HE(6RE_(1/6))PO_(4)ceramics allow them to be promising insulation materials in the future.

关键词： porous high-entropy(La_(1/6)Ce_(1/6)Pr_(1/6)Sm_(1/6)Eu_(1/6)Gd_(1/6))PO_(4) ceramics high-entropy strategy pore-forming agent method thermal insulation material thermal conductivity

A crosstalk-free dual-mode sweat sensing system for naked-eye sweat loss quantification via changes in structural reflectance

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Bio-Design and Manufacturing 2024年第4期7卷 428-438页

作者： Bowen Zhong Hao Xu Xiaokun Qin Lingchen Liu hailong wang Lili wang State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 100049China

Sweat loss monitoring is important for understanding the body’s thermoregulation and hydration status,as well as for comprehensive sweat *** recent advances,developing a low-cost,scalable,and universal method for the fabrication of colorimetric microfluidics designed for sweat loss monitoring remains *** this study,we propose a novel laserengraved surface roughening strategy for various flexible *** process permits the construction of microchannels that show distinct structural reflectance changes before and after sweat *** leveraging these unique optical properties,we have developed a fully laser-engraved microfluidic device for the quantification of naked-eye sweat *** sweat loss sensor is capable of a volume resolution of 0.5µL and a total volume capacity of 11µL,and can be customized to meet different performance ***,we report the development of a crosstalk-free dual-mode sweat microfluidic system that integrates an Ag/AgCl chloride sensor and a matching wireless measurement flexible printed circuit *** integrated system enables the real-time monitoring of colorimetric sweat loss signals and potential ion concentration signals without ***,we demonstrate the potential practical use of this microfluidic sweat loss sensor and its integrated system for sports medicine via on-body studies.

关键词： Sweat loss sensor Microfluidic design Structural reflectance Dual-mode integration Crosstalk-free