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Progress in Natural Science:Materials International 2013年第2期23卷 174-182页

作者： Shun Guo Qingkun Meng Guangyue Liao Liang Hu xinqing Zhao School of Materials Science and Engineering Beihang University

This paper presents a systematic study of newly developed metastable β-type Ti-25Nb-2Mo-4Sn (wt%) alloy with high strength and low elastic modulus, with focus on the microstructural evolution and mechanical behavior associated with aging. The pre-treatment (solution treatment or cold rolling) prior to aging exerts substantial influence on the subsequent aging response including microstructural evolution and mechanical behavior. Even under the same aging treatment, the aging products could be (β+ω), or alternatively (β+α), depending on the pre-treatments. This interesting aging response was discussed on the basis of the mechanism for ω formation. High-density dislocation tangles and grain boundaries induced by severe cold rolling play a key role in hindering the transition from β to isothermal ω, favoring the precipitation of α phase on aging. By aging cold-rolled specimen for short time, superior mechanical properties, i.e. high ultimate strength of ～1113 MPa and low elastic modulus of ～65 GPa, achieved in Ti-25Nb-2Mo-4Sn alloy. The characterization of microstructural evolution and compositional change indicated that the precipitation of fine α does not cause the enrichment of β-stabilizers in β matrix upon a short-time aging, guaranteeing low elastic modulus of the short-time aged specimen. Meanwhile, fine α precipitates as well as dislocations play a crucial part in strengthening, giving rise to its high yield strength and high ultimate tensile strength.

关键词： Metastable β Ti alloy Microstructural evolution ω Phase Low modulus High strength

Electronic energy loss and ion velocity correlation effects in track production in swift-ion-irradiated LiNbO_(3):A quantitative assessment between structural damage morphology and energy deposition

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Journal of Materials Science & Technology 2022年第21期116卷 30-40页

作者： xinqing Han Qing Huang Miguel L.Crespillo Eva Zarkadoula Yong Liu Xuelin Wang Peng Liu Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityQingdao 266237China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai 201800China Centro de Micro-Análisis de Materiales(CMAM) Universidad Autónoma de MadridMadrid E-28049Spain Materials Science&Technology Division Oak Ridge National LaboratoryOak RidgeTennessee 37831USA

The primary motivation for studying how irradiation modifies the structures and properties of solid materials involves the understanding of undesirable phenomena,including irradiation-induced degradation of components in nuclear reactors and space exploration,and beneficial applications,including material performance tailoring through ion beam modification and defect *** this work,the formation mechanism of latent tracks with different damage morphologies in LiNbO_(3)crystals under 0.09-6.17 Me V/u ion irradiation with an electronic energy loss from 2.6-13.2 ke V/nm is analyzed by experimental characterizations and numerical ***-induced damage is preliminarily evaluated via the prism coupling technique to analyze the correlation between the dark-mode spectra and energy loss profiles of irradiated *** the irradiation conditions of different ion velocities and electronic energy losses,different damage morphologies,from individual spherical defects to discontinuous and continuous tracks,are experimentally *** ion penetration process,the ion velocity determines the spatiotemporal distribution of deposited irradiation energy induced by electronic energy loss,meaning that the two essential factors including electronic energy loss and ion velocity coaffect the track *** inelastic thermal spike model is used to numerically calculate the spatiotemporal evolutions of energy deposition and the corresponding atomic temperature under different irradiation conditions,and a quantitative relationship is proposed by comparison with corresponding experimentally observed track damage *** obtained quantitative relationship between irradiation conditions and track damage provides deep insight and guidance for understanding the damage behavior of crystal materials in extreme radiation environments and selecting irradiation parameters,including ion species and energies,for ion beam technique application in atom

关键词： Latent track damage Thermal spike model Electronic energy loss Velocity effect Ion modification

Mechanical Properties and Transformation Behavior of NiTiNb Shape Memory Alloys

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Chinese Journal of Aeronautics 2009年第5期22卷 540-543页

作者： Liu Wei Zhao xinqing School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China

NiTiNb shape memory alloys have attracted much attention in pipe coupling or sealing system because of their large transformation hysteresis upon a proper pre-deformation. In order to clarify the effects of adding Nb on the mechanical properties as well as the transformation behavior of NiTiNb shape memory alloys, Ni47Ti44Nb9 and Ni49.8Ti45.2Nb5 alloys with different microstructures but with similar martensitic transformation start temperature, are prepared. Comparative studies on the microstructures, mechanical proPerties and transformation characteristics are conducted by means of scanning electron microscopy （SEM）, phase transformation measurements and mechanical property tests. It is found that Nia7Ti44Nb9 and Ni49.8Ti45.2Nb5 alloys possess similar transformation hysteresis in the as-annealed state. However, the presence of Nb and its status exerts important effects on the mechanical properties, especially the yield strength and the yield behavior of the alloys. Ni49.8Ti45.2Nb5 alloy exhibits remarkable increase in the yield strength than the Ni47Ti44Nb9 alloy. The transformation hysteresis of both alloys under pre-deformation is characterized and the relative mechanism is discussed.

关键词： NiTiNb martensitic transformation mechanical properties transformation hysteresis microstructure

Polarization Measurement of Auroral Kilometric Radiation by INTERBALL-2 Satellite

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Wuhan University Journal of Natural Sciences 1999年第1期4卷 66-72页

作者： Zhao, zhengyu Xie, Shuguo Shi, xinqing Lefeuvre, F. College of Electronic Information Wuhan University Wuhan China LPCE/CNRS ORLEANS Cedex 02 France

Preliminary analyses of low and high resolution data are presented from the polar plasma waves measured on board INTERBALL 2 satellite in three frequency bands: ELF(5 1000 Hz),VLF(1 20 kHz)and LF(20 260 kHz). The propagation and polarization characteristics of the Auroral Kilometric Radiation (AKR) emission are estimated and studied. The obtained result shows that R X and L O modes of AKR emission just above source regions are found. The propagation characteristics are also determined: wave normal directions weakly oblique or quasi parallel to the earth magnetic field direction.

关键词： INTERBALL 2 satellite AKR polarization characteristic

γ-Fe Nano-particles from Fe(CO)_5 by CW CO_2 Laser-driven

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Journal of Materials Science & Technology 1994年第2期10卷 148-150页

作者： xinqing ZHAO Yong LIANG Keshen XIAO Feng zheng and Zhuangqi HU (State Key Lab. of RSA, Institute of Metal Research, Academia Sinica, Shenyang, 110015, China)(To whom correspondence should be addressed) Acad Sinica Shenyang China

γ-Fe nano-particles with size of 20-40 nm were produced by SF6-sensitized CW CO2 laser-induced gaseous pyrolysis of Fe(Co) 5, The γ-Fe stabte in reaction zone at above 910℃ was *** rapid quenching prevents from the γ-Fe transforming to α-Fe as rapidly cooling from high temperature to room temperature, The characteristics of the particles were examined at room temperature by TEM. electron diffraction and XRD. It was proved that about 70% of γ-Fe phase in the particles was present. In addition. the lattice constant of the γ-Fe was 0.364 nm in place of 0.360 nm

关键词： Fe Nano-particles from Fe by CW CO2 Laser-driven Nano CO CW

Enhanced removal of sulfonamide antibiotics from water by phosphogypsum modified biochar composite

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Journal of Environmental Sciences 2023年第8期130卷 174-186页

作者： Zonghong Jiang Miao Chen xinqing Lee Qianwei Feng Ning Cheng Xueyang Zhang Shengsen Wang Bing Wang College of Resources and Environmental Engineering Guizhou UniversityGuiyang 50025China Key Laboratory of Karst Georesources and Environment Ministry of EducationGuiyang 550025China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China School of Environmental Engineering Xuzhou University of TechnologyXuzhou 221018China College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225127China

Antibiotic pollution has become a global eco-environmental *** reduce sulfonamide antibiotics in water and improve resource utilization of solid wastes,phosphogypsummodified biochar composite(PMBC)was prepared via facile one-step from distillers grains,wood chips,and *** physicochemical properties of PMBCwere characterized by scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR),Zeta potential,X-ray diffraction(XRD),*** influencing factors,adsorption behaviors,and mechanisms of sulfadiazine(SD)and sulfamethazine(SMT)onto PMBC were studied by batch and fixed bed column adsorption *** results showed that the removal rates of SD and SMT increased with the increase of phosphogypsum proportion,while decreased with the increase of solution *** maximum adsorption capacities of modified distillers grain and wood chips biochars for SD were 2.98 and 4.18 mg/g,and for SMT were 4.40 and 8.91mg/g,respectively,which was 9.0–22.3 times that of pristine *** bed column results demonstrated that PMBC had good adsorption capacities for SD and *** the solution flow rate was 2.0 mL/min and the dosage of PMBC was 5.0 g,the removal rates of SD and SMT by modified wood chips biochar were both higher than 50%in 4 *** main mechanisms of SD and SMT removal by PMBC are hydrogen bonding,π-πdonor-acceptor,electrostatic interaction,and hydrophobic *** study provides an effective method for the removal of antibiotics in water and the resource utilization of phosphogypsum.

关键词： Modified biochar Solid waste Antibiotics Phosphogypsum Fixed-bed adsorption

Effects of biochar-based fertilizers on nutrient leaching in a tobacco-planting soil

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Acta Geochimica 2019年第1期38卷 1-7页

作者： Yunlong Li Jianzhong Cheng xinqing Lee Yi Chen Weichang Gao Wenjie Pan Yuan Tang State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Guizhou Academy of Tobacco Science

Biochar is a soil amendment for increasing soil quality and decreasing nutrient leaching. However, there is little information on the impact of biochar-based fertilizer(BF) on soil nutrient leaching in agricultural soils. We conducted a soil column leaching experiment to study the effects of BF on the leaching of total nitrogen(TN), total phosphorus, and total potassium(TK) in tobacco soils. The distribution characteristics of NH_4^+-N, available P, and available K in soil profiles were analyzed after the application of BF. Biochar was prepared by pyrolysis of fluecured tobacco stems. It was applied at four levels, 0%, 3%,9%, and 15%(w/w), respectively, to the compound fertilizer. Compared with the control, the leaching loss of soil TN decreased by 8.36%, 6.72%, and 6.45%, and the loss of soil TK decreased by 9.18%, 9.31% and 11.82% in the 3%,9%, and 15% BF treatments, respectively. However, BF had no significant effect on the P leaching due to the low movement of P in the soil profile. In addition, the BF addition increased the immobilization of NH_4^+-N, available P, and available K in the soil profile. These results indicate that addition of BF to a tobacco-planting soil reduced nutrient leaching, and suggest that BF could be an effective method of applying biochar to agriculture fields.

关键词： Biochar-based fertilizer Soil column Nutrient elements Leaching loss Immobilization

Structural damage response of lanthanum and yttrium aluminate crystals to nuclear collisions and electronic excitation:Threshold assessment of irradiation damage

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Journal of Materials Science & Technology 2021年第31期90卷 95-107页

作者： Yong Liu xinqing Han Qing Huang Miguel L.Crespillo Peng Liu Eva Zarkadoula Xuelin Wang Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityQingdao 266237China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai 201800China Department of Materials Science&Engineering University of TennesseeKnoxvilleTN 37996United States Materials Science&Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831United States

A comparative analysis is performed on the structural damage response and associated mechanisms in lanthanum aluminate and yttrium aluminate crystals under various irradiation conditions by a combination of experimental and theoretical *** low-energy Au~+irradiation,the damage accumulation curve shows a higher damage rate for LaAlO_(3)crystals than YAlO_(3)*** relatively low irradiation tolerance of LaAlO_(3)to the action of nuclear collisions is ascribed to the large amorphization cross-section and effective cross-section for defect-stimulated *** swift Ar^(12+),Ni^(19+)and Kr^(17+)irradiation with different ion energies and velocities,the formed highly-disordered/amorphous latent tracks with different morphologies in pristine and predamaged crystals are discussed,and the corresponding electronic energy loss and lattice temperature thresholds are quantitatively *** to YAlO_(3),LaAlO_(3)exhibits lower sensitivity and higher damage tolerance to the electronic energy loss process,attributing to its relatively high recrystallization efficiency during the rapid quenching ***,the introduction of lattice defects into LaAlO_(3)and YAlO_(3)crystals considerably enhances the sensitivity and intensity of thermal spike response to the electronic energy loss,and the induced effective modification of track morphologies demonstrates the synergistic effect between the electronic energy loss and pre-existing defects created by nuclear *** this case,even under the action of electronic energy loss below the threshold,the lattice temperature in the nuclear-collision damaged crystalline system could still meet the criterion for track *** irradiation energy deposited to atoms and induced lattice temperature evolution discussed in this work provide a deeper insight into the complex processes involved in irradiation-induced latent track behaviors.

关键词： Nuclear energy loss Electronic energy loss Synergistic effect Irradiation damage Latent ion track

Strain glass transition in high damping Mn-22Cu-5Ni-2Fe alloy

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Progress in Natural Science:Materials International 2018年第5期28卷 614-617页

作者： Shiwen Hou Fangyu Qin Jingyun Han Wenlong Xiao Fengshuang Lu xinqing Zhao School of Materials Science and Engineering Beihang University School of Biological Science and Medical Engineering Beihang University Functional Materials Research Institute Central Iron and Steel Research Institute

It has been recognized that the high damping capacity of MnCu based alloys is closely related to the formation of elastic twins as a result of antiferromagnetic transition and martensitic transformation. However, the mechanism for these transitions in this kind of alloy has not been fully understood. For example, previous investigations ascribed the elastic modulus softening prior to martensitic transformation to antiferromagnetic or pre-martensitic transitions, although no convincing evidence was reported. In this paper, an intensive experimental study was made of the modulus softening and microstructural evolution in a typical high damping Mn-22Cu-5Ni-2 Fe alloy, and the evidence of strain glass transition was reported. Such a transition, characterized by a continuous formation of nano-martensite domains, is accompanied by a gradual frequency-dependent modulus softening over a broad temperature range prior to martensitic transformation.

关键词： Mn-22Cu-5Ni-2Fe High damping Strain glass transition Modulus softening Martensitic transformation

Urban food-energy-water nexus:a case study in Beijing

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Chinese Journal of Population,Resources and Environment 2021年第3期19卷 274-282页

作者： xinqing Li Lixiao Zhang Pengpeng Zhang Yan Hao Xin Xiong State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnviromentBeijing Normal UniversityBeijing100875China

Food,energy and water(FEW)are indispensable,irreplaceable and safeguarding resources with tangled interlinkages among each other,often framed in terms of‘nexus’.Cities have become the bustling hubs of resource consumption and production,facing the most intense ***,food security,fresh water shortage and fossil energy exhaustion have become the greatest challenge for the sustainable development of cities in the *** analysis and simulation of dynamic evolution of urban FEW demand and supply and its nexus would add significant and practical value for macro-management such as ensuring the security of urban *** Beijing as the case study,we established a dynamic model for the FEW demand and supply from the perspective of cross-ectoral and cross-regional nexus with the Stella modelling platform,then it was run for simulating the dynamic changes and nexus characteristics of FEW during the interval between 2016 and *** results showed that:①The gap between local production and demand of these three resources in Beijing will continue to *** 2035,Beijing will need 2.16 million tons of grain,0.83 million tons of meat,4.6 billion m3 of water and 91.65 million tons of standard coal of energy while the resources produced and supplied by locality independently will be 0.21 million tons,0.23 million tons,3.3 billion cubic meters and 16.5 million tons of standard coal *** has to draw on cross-boundary production to meet FEW-use with the increasing gap between local supply and demand.②There is a developing trend of the absolute quantity of interaction among ***,the‘outsourcing’feature is obvious and the indigenous nexus links of three resources are shifting to back-end supply chain such as transportation and treatment.③The change of nexus indexes are mainly affected by the mutual and strong dependence between food and *** and energy depend more and more on each other;in contrast,the inter-relationshi

关键词： Food-energy-water(FEW) Nexus Dynamic simulation Stella