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Comparison of Hot Corrosion Behavior of Ni_(36)Fe_(34)Al_(17)Cr_(10)Mo_(1)Ti_(2)and Ni_(34)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)Alloys in NaCl-KCl-Na_(2)SO_(4)Salt

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Acta Metallurgica Sinica(English Letters) 2025年第2期38卷 205-217页

作者： Xiaoming Liu Fengyang Quan Yuan Gao Shaodong Zhang Jianbin Wang Zhijun Wang Junjie Li Feng He Jincheng Wang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China CNNC Key Laboratory for Severe Accident research in Nuclear Power Safety China Nuclear Power Engineering Co.LtdBeijing 100840China Jiangxi Key Laboratory of Wear and Corrosion Resistant Materials Jiangxi Hengda High Technology Co.LtdNanchang 330096China

Hot corrosion in molten salt is a complex process,involving both chemical corrosion and electrochemical *** reactions and oxide dissolution can also impact the corrosion *** with single component/type salt,multicomponent/type hot corrosion leads to more severe degradation,while the multi-component alloys offer potential chances for developing anti-corrosion metallic *** this study,we aim to elucidate the hot corrosion behavior and gain a better understanding of the corrosion mechanism of the multi-component alloys under multi-component/type NaCl-KCl-Na_(2)SO_(4)*** corrosion behavior of dual-phaseNi_(36)Fe_(34)Al_(17)Cr_(10)Mo_(1)Ti_(2)(HEA-1)and Ni_(34)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)(HEA-2)alloys was studied within NaCl-KCl-Na_(2)SO_(4)molten salt with mass ratios of 5:5:1 and 5:5:*** exposure to the salt at 650°C for 168 h,it was found that the Ni_(34)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)exhibited better corrosion resistance thanNi_(36)Fe_(34)Al_(17)Cr_(10)Mo_(1)Ti_(2).The improved performance of Ni_(30)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)alloy was attributed to the Co element,which facilitated the formation of dense oxides scale and enhanced scale *** chlorides with stronger penetration ability dominated the corrosion process and alkali sulfate further aggravated the *** primary corrosion mechanisms involved in this process were identified as“electrochemical mechanism”attacking the body-centered cubic structure in the alloys and“active oxidation”causing dissolution of the alloy elements.

关键词： Multi-component salt Corrosion behavior Interfacial reaction Oxide scale Corrosion mechanism

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New Co-MOF adsorption material with pharynx-shaped channel and large cavity for record ethylene and propylene purification

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science China Chemistry 2025年第3期68卷 967-973页

作者： Lin Zhang Jia-Qi Ma Yi-Zhao Guo Xiu-Yuan Li Lei Hou Yao-Yu Wang Zhonghua Zhu Key Laboratory of Synthetic and natural Functional Molecule of the Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi’an 710069China School of Chemical Engineering The University of QueenslandBrisbane 4072Australia

Ethylene(C_(2)H_(4)) and propylene(C_(3)H_(6)) produced by methanol to olefin(MTO) technology are important chemical raw ***,the purification and separation between C_(2)H_(4) and C_(3)H_(6) mixtures is very ***,a novel microporous metal-organic framework(MOF) adsorbent Co_(2)(OATA)(DPA) was fabricated through mixed linkers of 5,5'-(oxalylbis(azanediyl))diisophthalic acid(H_(4)OATA) and V-shaped di(pyridin-4-yl)amine(DPA) with -NHCO- and -NH- functional groups,which was endowed with ideal small pore size,large cavity,and interesting C_(3)H_(6) trap constructed by four sets of -NH- *** 298 K and a crucial low pressure(0.05 bar) for the separation in microporous materials,the MOF shows ultra-high C_(3)H_(6) preferential adsorption(97.8 cm^(3)g^(-1)) and considerable C_(3)H_(6)/C_(2)H_(4) selectivity(about 22),representing an advanced material for the reported porous materials with C_(3)H_(6)/C_(2)H_(4) separation *** studies of single crystal X-ray diffraction and simulations showed that the customized pore limitation in the MOF provided stronger multiple attractive interactions with C_(3)H_(6),leading to significant adsorption selectivity in the process of competing adsorption for C_(3)H_(6) and C_(2)H_(4).In one separation step,the MOF generated highly pure C_(2)H_(4)(≥99.9%) and C_(3)H_(6)(≥99.6%) products respectively from C_(2)H_(4)/C_(3)H_(6) mixtures at different ratios,pressures,and temperatures.

关键词： metal-organic framework solvothermal synthesis crystal structure gas adsorption and separation olefins purification

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Effect of solidification path and volume shrinkage on cracking susceptibility at different cooling rates

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JOURNAL OF IRON AND STEEL research INTERNATIONAL 2025年第2期32卷 418-425页

作者： Wang, Wei-an Yang, Yong-kun Qiu, Guo-xing Wang, Jian-li Wang, Guo-hua Li, Xiao-ming Xian Univ Architecture & Technol Sch Met Engn Xian 710055 Shaanxi Peoples R China

Understanding the solidification characteristics and microsegregation under varying cooling rates is essential to comprehend the formation of center cracks in large section round billets. P91 high-alloy steel was taken as the research object. The peritectic solidification process, steel solidification shrinkage and microsegregation of solute elements at different cooling rates were studied and revealed by high-temperature confocal scanning laser microscopy, Thermo-Calc thermodynamic software, hybrid laser microscopy and electron probe microanalysis. The results showed that as the cooling rate increased from 10 to 100 degrees C/min, the percentage of delta-Fe involved in peritectic reaction decreased from 98.6% to 36.4%, the surface roughness of the sample decreased from 8.59 to 5.14 mu m, and the volume shrinkage decreased from 5.92% to 2.18%. Moreover, the solidification path enters the crack sensitivity area at lower cooling rates (10 and 50 degrees C/min), while the solidification path is far from the crack susceptibility area at higher cooling rate (100 degrees C/min). With the increase in cooling rate, the segregation deviation parameters of the elements V, C, Mo and Cr were decreased by 9.52%, 22.2%, 29.4% and 70.5%, respectively. Solidification path changed and microsegregation weakened by adjusting cooling mode might be a way to improve central crack.

关键词： In situ observation P91 high-alloy steel Central crack Large section continuous casting round billet Surface roughness Peritectic solidification

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Facilitating the polysulfides conversion kinetics by porous LaOCl nanofibers towards long-cycling lithium-sulfur batteries

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Chinese Chemical Letters 2025年第3期36卷 522-527页

作者： Tengfei Yang Jingshuai Xiao Xiao Sun Yan Song Chaozheng He Institute of Environment and Energy Catalysis Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices School of Materials Science and Chemical Engineering Xi'an Technological University

Lithium-sulfur batteries are considered to be a new generation of high energy density batteries due to their non-toxicity,low cost and high theoretical specific ***,the development of practical lithium-sulfur batteries is seriously impeded by the sluggish multi-electron redox reaction of sulfur species and obstinate shuttle effect of *** this study,a porous lanthanum oxychloride （La OCl）nanofiber is designed as adsorbent and electrocatalyst of polysulfides to regulate the redox kinetics and suppress shuttling of sulfur *** from the porous architecture and luxuriant active site of LaOCl nanofibers,the meliorative polarization effect and sulfur expansion can be *** LaOCl/S electrode exhibits an initial discharge specific capacity of 1112.3 mAh/g at 0.1 C and maintains a superior cycling performance with a slight decay of 0.02%per cycle over 1000 cycles at 1.0 ***,even under a high sulfur loading of 4.6 mg/cm2,the S cathode with LaOCl nanofibers still retains a high reversible areal capacity of 4.2 mAh/cm2at 0.2 C and a stable cycling *** a porous host expands the application of rare earth based catalysts in lithium-sulfur batteries and provides an alternative approach to facilitate the polysulfides conversion kinetics.

关键词： High sulfur loading LaOCl nanofibers Lithium-sulfur batteries Polysulfides Shuttle effect

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Multi-objective optimization of laser perforated fuel filter parameters based on artificial neural network and genetic algorithm

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Particuology 2025年第1期96卷 57-70页

作者： Yifan Wang Tianyi Zhang Lei Chen Wenquan Tao Key Laboratory of Thermo-Fluid science and Engineering MOESchool of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an710049China

In precise fuel circuit systems, the filtration of particulate impurities seriously affects the efficiency and service life of various components. For filtration process intensification of high-pressure fuel laser perforated filters, the two-phase flow characteristics in filters is studied. The size, position and number of filtration holes are taken as optimization variables, and take the filtration efficiency and flow pressure drop as optimization objectives. Computational fluid dynamics (CFD) is used to simulate the two-phase motion of continuous phase and discrete particles in a periodic unit. Artificial neural networks (ANN) are utilized for objectives prediction, and the NSGA-II genetic algorithm is employed for multi-objective optimization, resulting in the Pareto front solution set. Furtherly, the reasonable solution is selected by introducing TOPSIS to ensure that two optimization indexes are relatively smaller and balanced. The optimized filter element scheme allows the filter to have a pressure drop of less than 3.2 MPa under high pressure and a filtration efficiency of over 80% for spherical particle impurities with a diameter of 5 μm or more.

关键词： Fuel filter Multiphase flow Neural network Genetic algorithm Multi-objective optimization Particle

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Enhancing ethane/ethylene separation performance through the amino-functionalization of ethane-selective MOF

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Chinese Chemical Letters 2025年第3期36卷 588-593页

作者： Yao-Yu Ma Wen-Juan Shi Gang-Ding Wang Xin Liu Lei Hou Yao-Yu Wang Key Laboratory of Synthetic and natural Functional Molecule of the Ministry of Education Shaanxi Key Laboratory of Physico-Inorganic ChemistryCollege of Chemistry&Materials ScienceNorthwest University

The utilization of ethane-selective materials for adsorption-based separation technology presents an energy-efficient alternative to cryogenic distillation for ethylene （C2H4） purification from ethane（C2H6）.To study the relations between separation performance and pore environments,we carried out the isoreticular chemistry rule to introduce the-NH2groups into a C2H6-selective MOF[Cu1.5（BTC）(DPU)1.5（H2O）1.5],and successfully improved the adsorption capacity and selectivity for C2H6over *** NH2-functionalized MOF[Cu1.5（NH2-BTC）(DPU)1.5（H2O）1.5]with a relatively narrow pore not only forms appropriate pore restriction but also provides additional binding sites to enhance the adsorption capacity of C2H6relative to *** gas adsorption and dynamic breakthrough results indicated that the-NH2functionalization significantly enhanced the separation performance of materials for C2H6/C2H4mixtures,allowing the production of C2H4with a purity of over 99.99%and a productivity of up to 30.02 L/kg in one *** calculations revealed that the synergistic effect of appropriate pore confinement and NH2-modified functional surfaces imposed stronger interactions on C2H6than C2H4.

关键词： Adsorption selectivity Amino-functionalization Gas adsorption Metal-organic framework Separation

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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

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Combined anisotropic and cyclic constitutive model for laser powder bed fusion fabricated aluminum alloy

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Chinese Journal of Aeronautics 2025年第1期38卷 165-184页

作者： Fei-Fan LI Jihong ZHU Weihong ZHANG Shifeng WEN Jingwen SONG Jun MA Gang FANG State IJR Center of Aerospace Design and Additive Manufacturing School of Mechanical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China School of Materials science and Engineering Northwestern Polytechnical UniversityXi'an 710072China Department of Mechanical and Industrial Engineering Norwegian University of Science and TechnologyTrondheim 7491Norway State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China

This study presents new methods to effectively model the anisotropic yielding and hardening behavior of laser powder bed fusion fabricated aluminum alloy under both monotonic and cyclic loading *** proposed model combines the yield surface-interpolation method to accurately describe the anisotropic hardening rates in various directions,with the Chaboche kinematic hardening rule to precisely reflect the cyclic *** numerical implementation of the combined anisotropic and cyclic constitutive model,a fully implicit stress integration algorithm based on return mapping method is ***,the multiple parameters associated with the model are categorized and identified in an uncoupled *** isotropic and cyclic hardening parameters are determined by an inverse method,and the stability of the optimization outcomes is validated by applying different starting points for the ***,the back-stress effect on the identification of anisotropic parameters associated with the stress invariant-based Hill48 yield function is considered for the first *** consideration leads to an improved prediction accuracy compared to the identification of anisotropic parameters without considering back-stress *** combined anisotropic and cyclic constitutive model,along with the calibrated parameters,are proven capable of accurately reproducing the intricate deformation behavior of laser powder bed fusion fabricated AlSi10Mg.

关键词： Constitutive models Anisotropy Kinematic hardening Laser powder bed fusion Aluminum alloys

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Enhancing solid-state lithium metal battery performance via indium-based modification of electrolytes and lithium metal surfaces:mechanistic insights and optimization

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science China Chemistry 2025年第3期68卷 1144-1158页

作者： Zhongkai Wu Chen Liu Ziling Jiang Lin Li Siwu Li Chaochao Wei Qiyue Luo Xia Chen Long Zhang Shijie Cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China Interdisciplinary research Center of Smart Sensors Academy of Advanced Interdisciplinary ResearchXidian UniversityXi’an 710126China College of Physics and Energy Fujian Normal UniversityFuzhou 350117China

Argyrodite-based solid-state lithium metal batteries exhibit significant potential as next-generation energy storage ***,their practical applications are constrained by the intrinsic poor stability of argyrodite towards Li metal and exposure to air/***,an indium-involved modification strategy is employed to address these *** optimized doping yields a high Li-ion conductivity of 7.5 mS cm^(-1)for Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)electrolyte,accompanied by enhanced endurance against air/moisture and bare Li *** retains 92.0%of its original conductivity after exposure to air at a low dew point of-60℃in dry ***,a composite layer comprising Li-In alloy and Li F phases is generated on the surface of lithium metal anode via the reaction between InF_(3)and molten *** layer effectively mitigates Li dendrite growth by creating a physical barrier from the robust LiF phase,while the Li-In alloy induces uniform Li-ion deposition and accelerates Li transport dynamics across the interphase between the solid electrolyte/Li ***,the In-doped electrolyte facilitates the in-situ generation of Li-In alloy within its voids,reducing local current density and further inhibiting lithium dendrite ***,the combination of the Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)electrolyte and the InF_(3)@Li anode provides exceptional electrochemical performances in both symmetric cells and solid-state lithium metal batteries across different operating ***,the LiNbO_(3)@LiNi_(0.7)Co_(0.2)Mn_(0.1)O_(2)/Li_(5.54)In_(0.02)PS_(4.47)O_(0.03)Cl_(1.5)/InF_(3)@Li cell delivers a high discharge capacity of 167.8 mAh g^(-1)at 0.5 C under 25℃and retains 80.0%of its initial value after 400 *** work offers a viable strategy for designing functional interfaces with enhanced stability for sulfide-based solid-state lithium batteries.

关键词： Li_(5.5)PS_(4.5)Cl_(1.5)solid electrolyte In_(2)O_(3)dual-doping InF_(3)surface-modification chemical/electrochemical stability electrochemical performance

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Highly Thermally Conductiveand Flame-Retardant Waterborne Polyurethane Composites with 3D BNNS Bridging Structures via MagneticField Assistance

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Nano-Micro Letters 2025年第6期17卷 279-296页

作者： Hao Jiang Yuhui Xie Mukun He Jindao Li Feng Wu Hua Guo Yongqiang Guo Delong Xie Yi Mei Junwei Gu Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials The International Joint Laboratory for Sustainable Polymers of Yunnan ProvinceThe Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan ProvinceFaculty of Chemical EngineeringKunming University of Science and TechnologyKunming 650500People’s Republic of China shaanxi Key Laboratory of Macromolecular science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China

The microstructure design for thermal conduction pathways in polymeric electrical encapsulation materials is essential to meet the stringent requirements for efficient thermal management and thermal runaway safety in modern electronic ***,a composite with three-dimensional network(Ho/U-BNNS/WPU)is developed by simultaneously incorporating magnetically modified boron nitride nanosheets(M@BNNS)and non-magnetic organo-grafted BNNS(U-BNNS)into waterborne polyurethane(WPU)to synchronous molding under a horizontal magnetic *** results indicate that the continuous in-plane pathways formed by M@BNNS aligned along the magnetic field direction,combined with the bridging structure established by U-BNNS,enable Ho/U-BNNS/WPU to exhibit exceptional in-plane(λ//)and through-plane thermal conductivities(λ_(⊥)).In particular,with the addition of 30 wt%M@BNNS and 5 wt%U-BNNS,theλ//andλ_(⊥)of composites reach 11.47 and 2.88 W m^(-1) K^(-1),respectively,which representing a 194.2%improvement inλ_(⊥)compared to the composites with a single orientation of M@***,Ho/U-BNNS/WPU exhibits distinguished thermal management capabilities as thermal interface materials for LED and *** composites also demonstrate excellent flame retardancy,with a peak heat release and total heat release reduced by 58.9%and 36.9%,respectively,compared to ***,this work offers new insights into the thermally conductive structural design and efficient flame-retardant systems of polymer composites,presenting broad application potential in electronic packaging fields.

关键词： Boron nitride nanosheets Magnetic response Structural design Thermal conductivity Flame retardancy

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