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EFFECT OF VACUUm.h.AT TREATmENT ON OXIDATION BEhAVIOR OF SPUTTERED NiCrAlY COATING

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Acta metallurgica Sinica(English Letters) 2002年第1期15卷 61-66页

作者： m.h. li X.F. Sun Z.Y. Zhang h.R. Guan W.Y. hu Z.Q Institute of metal Research The Chinese Academy of Sciences Shenyang 110016 China

A bond coat for thermal barrier coating (TBC), NiCrAlY coating, is subjected to vac-uum.h.at treatment in order to remove internal stress before ceramic top coat is de-posited. The effect of vacuum.h.at treatment on the oxidation behavior of the sputtered NiCrAlY coating has been investigated. The as-sputtered NiCrAlY coating consists of γ-Ni and b-NiAl phases. After vacuum.h.at treatment, the sputtered NiCrAlY coating mainly consists of γ'-Ni3Al, β-NiAl, γ-Ni, and trace of α-Al2O3 phases. The isothermal oxidation of sputtered NiCrAlY coating with and without vacuum.h.at treatment has been performed at 1000℃. It is shown that a-Al2O3 formed during vacuum.h.at treatment acts as nuclei for the formation of a-Al2O3, and the protective a-Al2O3 scale is formed more rapidly on the vacuum.h.at treated NiCrAlY coating than that formed on the untreated coating. Also the a-Al2O3 scale has a better adherence to the vacuum.h.at treated NiCrAlY coating. Therefore the vacuum.h.at treatment improves the oxidation resistance of sputtered NiCrAlY coating.

关键词： vacuum.h.at treatment oxidation sputtered NiCrAlY coating

STUDY OF ThE EXChANGE BIAS FIELD OF NiFe/Femn BILAYERS

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Acta metallurgica Sinica(English Letters) 2002年第2期15卷 238-242页

作者： m.h. li1’2), G.h. Yu1). F. W. Zhu1) and W.Y. Lai2) 1)Department of material Physics, University of Science and Technology Beijing, Beijing 100083, China 2)State Key Laboratory for magnetism. Institute of Physics, The Chinese Academy of Sciences, Beijing Department of material Physics. University of Science and Technology Beijing State Key Laboratory for magnetism. Institute of Physics The Chinese Academy of Sciences

The exchange bias field of NiFe/Femn films with Ta/ Cu buffer was proved tobe lower than that of the films with Ta buffer. The crystallographic texture, surface roughness andelements distribution were examined in these two sets of samples, and there is no apparentdifference for the texture and roughness. however, the segregation of Cu atoms above NiFe surface inthe multilayer of Ta/Cu/NiFe has been observed by using the angle-resolved X-ray photoelectronspectroscopy (XPS). The decrease of the exchange bias field for NiFe/Femn films with Ta/ Cu bufferlayers is mainly caused by the Cu atoms segregation at the interface between NiFe and Femn.

关键词： NiFe/Femn exchange bias field texture surface roughness surfacesegregation

冠状动脉完全闭塞性病变:CT显示血栓内线性强化预示经皮冠状动脉介入治疗效果较好

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国际医学放射学杂志 2013年第2期 169-170页

作者： m.h. li J.Y. Zhang J.W. Pan Z.G. Lu 李宁 Departments of Radiology and Cardiology Shanghai No. 6 People’s Hospital School of Medicine Shanghai Jiaotong University

目的评估经CT冠状动脉血管成像发现的冠状动脉完全闭塞性(CTO)病变中的血栓内线性强化及其与经皮冠状动脉介入(PCI)治疗效果的相关性。材料与方法所有病人均签署书面知情同意书,研究方案经医院伦理委员会批准。前瞻性地选择经最初常规... 详细信息

目的评估经CT冠状动脉血管成像发现的冠状动脉完全闭塞性(CTO)病变中的血栓内线性强化及其与经皮冠状动脉介入(PCI)治疗效果的相关性。材料与方法所有病人均签署书面知情同意书,研究方案经医院伦理委员会批准。前瞻性地选择经最初常规冠状动脉造影证实为CTO病变的连续病例于分期PCI治疗之前进行CT冠状动脉血管成像。血栓内线性强化定义为穿过闭塞段的线性强化区域,其CT值大于120hU。在CT冠状动脉成像上测定血管造影的特征包括:病变长度、血栓内线性强化的长度和钙化积分。采用单变量及多变量统计检验来确定PCI治疗成功的相关变量。结果本研究包括80例病人的88个CTO病灶。51个病灶经PCI治疗后成功再通。PCI治疗失败组的病变长度较长(P=0.043)。经PCI成功治疗的51个病变中,30个(59%)病灶中发现血栓内线性强化。然而,PCI治疗失败的37例病人中7例(19%)发现线性强化(与PCI治疗成功病人相比P<0.001)。走行迂曲被认为是PCI治疗效果不佳的唯一的血管成像指标(P=0.008)。经多变量分析证实血栓内线性强化的存在是PCI治疗成功的唯一独立预测指标(比值比:4.926;95%CI:1.646～14.74;P=0.004)。结论对于CTO病变,CT冠状动脉血管成像显示的闭塞段血栓内线性强化的存在可预示较好的PCI治疗效果。

关键词：线性强化 PCI CT 冠状动脉血栓

Towards high-performance,efficient and sustainable material processing technologies for aerospace applications

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Chinese Journal of Aeronautics 2025年第1期38卷 1-2页

作者： Jun mA m.W.FU Stefania BRUSChI heng li State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Department of mechanical and Industrial Engineering Norwegian University of Science and TechnologyTrondheim 7491Norway Department of mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Industrial Engineering University of PadovaPadova 35131Italy

The aerospace and aviation industry has long been at the forefront of materials and processing technologies,driven by its ongoing demand for lightweight,highly reliable,and durable *** manufacturing is a critical discipline that directly affects the performance,functionality,and safety of aircraft and aerospace *** meet the above-mentioned stringent requirements,advanced materials and cutting-edge processing technologies have evolved alongside aerospace innovations.

关键词： performance aviation mentioned

mossbauer,optical and structural properties of Fe^(3+) ion in borate glass

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Journal of Rare Earths 2025年第1期43卷 162-170,I0006页

作者： Essam A.Elkelany hesham Y.Amin A.Samir m.m.EL-hady h.h.El-Bahnasawy moukhtar A.hassan Basic Science Department Faculty of EngineeringSinai UniversityAl-Arish45511Egypt School of Information and Electrical Engineering Hangzhou City UniversityHangzhou30015China State Key Laboratory of modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou310027China Basic Science Department Faculty of Engineering at ShoubraBenha University11629Egypt Physics Department Faculty of ScienceAl-Azhar University11884CairoEgypt

Lanthanum-bearing iron lithium borate glass is a quaternary system for oxide glasses and was prepared via the melt-quenching *** present article correlates the structure,optical,ligand field and m?ssbauer data on iron lithium borate glass co ntaining La^(3+).The density was measured,while the molar volume was *** physical parameters are *** increasing the La_(2)O_(3) content within the glass network,infrared spectra analysis reveals structural modifications such as the increase in BO_(4) units and the decline in both BO_(3) units and NBO bonds ***,optical absorption spectra were *** absorption spectra disclose a plethora of electronic transitions that are related to Fe^(3+)in tetrahedral and octahedral sites,however,Fe^(2+)phase is not observed in optical spectra,but it has a clear signature in m?ssbauer ***,the glass absorption edges undergo a clear blue shift,reflecting an increased band gap energy(1.96-2.28 eV).The decline in NBO bonds justifies this ***,the values of crystal field splitting are increased,while the values of Racah parameters are *** trend is justified by the decline in NBO bonds and increases electron localization around Fe cations.m?ssbauer spectra confirm the existence of Fe^(3+)in tetrahedral and octahedral sites,while Fe^(2+)exists in only a tetrahedral *** increasing La_(2)O_(3) content,the isomer shift of Fe^(3+)in tetrahedral sites changes to be 0.312-0.329 mm/s,while the isomer shift of octahedral Fe^(3+)is 0.424-0.456 mm/*** findings coincide with optical *** the isomer shift of tetrahedral Fe^(2+)is 0.902-0.911 mm/*** results of structural,optical and ligand field associated with m?ssbauer spectra open more vistas toward the utility of these samples in the optics realm.

关键词： Fe3+ions Rare-earth oxide mossbauer spectra ligand field parameters Optical properties

Combining slow-release fertilizer and plastic film mulching reduced the carbon footprint and enhanced maize yield on the Loess Plateau

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Journal of Environmental Sciences 2025年第1期147卷 359-369页

作者： Xiaoqing han Pengfei Dang Lechen liao Fangqi Song miaomiao Zhang maoxue Zhang Guoqing li Shuyue Wen Ning Yang Xiping Pan Xiaofan Wang WenWang Xiaoliang Qin Charles O.Joseph Kadambot h.m.Siddique College of Agronomy Key Laboratory of Crop Physi-ecology and Tillage Science in Northwestern Loess PlateauNorthwest A&F UniversityYanglingShaanxi 712100China Department of Crop Sciences and Beekeeping Technology College of Agricultural Sciences and Food Technology University of Dar es SalaamMwalimu Julius Nyerere Mlimani CampusP.O.Box 35091Dar es SalaamTanzania College of life Science Yulin UniversityChongwen Road No.4YulinShaanxi719000China The UWA Institute of Agriculture and School of Agriculture&Environment The University of Western AustraliaPerth WA 6001Australia

Agricultural practices significantly contribute to greenhouse gas(GhG)emissions,necessitating cleaner production technologies to reduce environmental pressure and achieve sustainable maize *** film mulching is commonly used in the Loess Plateau *** slow-release fertilizers as a replacement for urea within this practice can reduce nitrogen losses and enhance crop *** these techniques represents a novel agricultural approach in semi-arid ***,the impact of this integration on soil carbon storage(SOCS),carbon footprint(CF),and economic benefits has received limited research ***,we conducted an eight-year study(2015-2022)in the semi-arid northwestern region to quantify the effects of four treatments[urea supplied without plastic film mulching(CK-U),slow-release fertilizer supplied without plastic film mulching(CK-S),urea supplied with plastic film mulching(Pm-U),and slow-release fertilizer supplied with plastic film mulching(Pm-S)]on soil fertility,economic and environmental *** results revealed that nitrogen fertilizer was the primary contributor to total GhG emissions(≥71.97%).Compared to other treatments,Pm-S increased average grain yield by 12.01%-37.89%,water use efficiency by 9.19%-23.33%,nitrogen accumulation by 27.07%-66.19%,and net return by 6.21%-29.57%.Furthermore,Pm-S decreased CF by 12.87%-44.31%and CF per net return by 14.25%-41.16%.After eight years,Pm-S increased SOCS(0-40 cm)by 2.46%,while Pm-U decreased it by 7.09%.These findings highlight the positive effects of Pm-S on surface soil fertility,economic gains,and environmental benefits in spring maize production on the Loess Plateau,underscoring its potential for widespread adoption and application.

关键词： Plastic film mulching Slow-release fertilizer maize grain yield Carbon footprint Economic benefits

Ti^(3+)/Ti^(4+)and Co^(2+)/Co^(3+)redox couples in Ce-doped Co-Ce/TiO2 for enhancing photothermocatalytic toluene oxidation

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Journal of Environmental Sciences 2025年第3期149卷 164-176页

作者： Guanghui li Xiaolan li Xinhui hao Qiang li meng Zhang hongpeng Jia Xiamen Key Laboratory of materials for Gaseous Pollutant Control Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China CAS Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China

Cerium and cobalt loaded Co-Ce/TiO_(2)catalyst prepared by impregnation method was investigated for photothermal catalytic toluene *** on catalyst characterizations(XPS,EPR and h2-TPR),redox cycle between Co and TiO_(2)(Co^(2+)+Ti^(4+)↔Co^(3+)+Ti^(3+))results in the formation of Co^(3+),Ti^(3+)and oxygen vacancies,which play important roles in toluene catalytic oxidation *** introduction of Ce brings in the dual redox cycles(Co^(2+)+Ti^(4+)↔Co^(3+)+Ti^(3+),Co^(2+)+Ce4+↔Co^(3+)+Ce3+),further promoting the elevation of reaction sites *** full spectrum irradiation with light intensity of 580mW/cm^(2),Co-Ce/TiO_(2)catalyst achieved 96%of toluene conversion and 73%of CO_(2)yield,obviously higher than Co/P25 and Co/TiO_(2).Co-Ce/TiO_(2)efficiently maintains 10-hour stability test under water vapor conditions and exhibits better photothermal catalytic performance than counterparts under different wavelengths *** catalytic reaction displays improved activities compared with thermal catalysis,which is attributed to the promotional effect of light including photocatalysis and light activation of reactive oxygen species.

关键词： Photothermal catalysis Redox cycle Oxygen vacancy VOCs Titanium dioxide

Computational Insights into the Interactions of Farnesoid X Receptor with Fargesone A,a Natural Product from magnolia fargesii

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Chemical Research in Chinese Universities 2025年第1期41卷 146-154页

作者： ZhANG li ChEN Yaqiong li Weihua School of Pharmacy Shanghai Key Laboratory of Molecular ImagingShanghai University of Medicine and Health SciencesShanghai201318P.R.China School of Pharmacy East China University of Science and TechnologyShanghai200237P.R.China

Farnesoid X receptor(FXR)is a ligand-activated nuclear receptor and plays important roles in the regulation of metabolism and homeostasis of several important physiological substances,such as bile acids,glucose,and *** such,FXR has become a promising therapeutic target for the treatment of several metabolic diseases and liver ***,fargesone A(FA),a natural product from magnolia fargesii was identified to be a novel,potent FXR agonist that demonstrated good in vitro and in vivo ***,the detailed interaction mechanism of FA with FXR remains *** this study,we employed multiple computational approaches including molecular docking,molecular dynamics simulation,and binding free energy calculation to address the *** comparisons of the structural dynamics and binding free energies,an optimal binding mode was identified,in which FA interacts with FXR via a direct hydrogen bond with his447 and hydrophobic interactions with multiple residues,such as Leu287,met290,met328,Ile352,and *** mutants,namely,h447F and L287N,were further constructed to validate the importance of the identified *** anticipate that these findings could be helpful for future rational design of new FA analogues targeting FXR.

关键词： Farnesoid X receptor(FXR) Binding mode molecular docking molecular dynamics Fargesone A

Relative humidity-dependent evolution of molecular composition ofα-pinene secondary organic aerosol upon heterogeneous oxidation by hydroxyl radicals

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Journal of Environmental Sciences 2025年第2期148卷 210-220页

作者： Wei Wang Chenxi li huayun Xiao Ziyue li Yue Zhao School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

heterogeneous oxidation by gas-phase oxidants is an important chemical transformation pathway of secondary organic aerosol(SOA)and plays an important role in controlling the abundance,properties,as well as climate and health impacts of ***,our knowledge on this heterogeneous chemistry remains *** this study,the heterogeneous oxidation ofα-pinene ozonolysis SOA by hydroxyl(Oh)radicals was investigated under both low and high relative humidity(Rh)conditions,with an em.h.sis on the evolution of molecular composition of SOA and its Rh *** is found that the heterogeneous oxidation of SOA at an Oh exposure level equivalent to 12 hr of atmospheric aging leads to particle mass loss of 60%at 25%Rh and 95%at 90%*** heterogeneous oxidation strongly changes the molecular composition of *** dimer-to-monomer signal ratios increase dramatically with rising Oh exposure,in particular under high Rh conditions,suggesting that aerosol water stimulates the reaction of monomers with Oh radicals more than that of *** addition,the typical SOA tracer compounds such as pinic acid,pinonic acid,hydroxy pinonic acid and dimer esters(e.g.,C17h26O8 and C19h28O7)have lifetimes of several hours against heterogeneous Oh oxidation under typical atmospheric conditions,which highlights the need for the consideration of their heterogeneous loss in the estimation of monoterpene SOA concentrations using tracer-based *** study sheds lights on the heterogeneous oxidation chemistry ofmonoterpene SOA andwould help to understand their evolution and impacts in the atmosphere.

关键词： Secondary organic aerosol(SOA) heterogeneous oxidation Chemical transformation molecular composition Aerosol water