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Effect of Mesh Resolution on the Particle Deformation during Cold Spraying by Eulerian Formulation

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稀有金属材料与工程 2012年第S1期41卷 327-330页

作者： Li Wenya Yu Min Wu Hui liao hanlin NW Polytech Univ Shaanxi Key Lab Frict Welding Technol Sch Mat Sci & Engn Xian 710072 Peoples R China Univ Technol Belfort Montbeliard LERMPS F-90010 Befort France

Numerical simulations focusing on the impacting behavior of cold sprayed particles were usually conducted by the Lagrangian ***,the calculated outputs were much dependent on the meshing size owing to the excessive element ***,the Eulerian formulation becomes attractive,because it can avoid the extreme distortion of *** the present study,a copper particle impact on the same material substrate in cold spraying was simulated using the Eulerian formulation available in the ABAQUS software(Ver 6.8).The dependency of the calculated outputs on the meshing resolution were detailedly *** show that the meshing resolution not only has an effect on the shape of the deformed particle,but also it can significantly influence the maximum plastic strain and temperature under a given impact *** addition,the copper particle deformation process at the critical velocity of 310 m/s shows that a jet composed of both of the particle and substrate materials can be formed and gets elongated with the impact time.

关键词： cold spraying Eulerian formulation meshing resolution

In-situ formation of Ni-Al intermetallics-coated graphite/Al composite in a cold-sprayed coating and its high temperature tribological behaviors

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Journal of Materials Science & Technology 2017年第6期33卷 507-515页

作者： Chunjie Huang Wenya Li Marie-Pierre Planche hanlin liao Ghislain Montavon ICB UMR 6303 CNRS Univ.Bourgogne Franche-ComtéUTBM State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding Technologies Northwestern Polytechnical University

In this study, cold spraying（CS） was used to deposit a mixture of nickel-coated graphite and 40 vol.% Al powder（Ni-Gr/Al） on a steel substrate aiming to effectively preserve a certain volume fraction of graphite in the deposited Ni-Gr/Al composite coating. The microstructure of the as-sprayed coating and the effect of post-spray heat-treatment（PSHT） temperatures on the in-situ formation of Ni-Al intermetallic phases in coating were studied. The tribological behaviors of the as-sprayed coating and the PSHTed coating under 450？C were tested at 25？C, while the as-sprayed coating was tested at 450？C for *** a result, the Ni-Gr particles showed a homogenous distribution in the coating. The multilayer Ni-Al intermetallics-coated graphite/Al composite coating was achieved in situ after the PSHT of 450？C, where the graphite did decompose at 550？C leaving big pores in the coating. The coefficients of friction（COF）of the CSed coating and the PSHTed coating were measured at 450？C as well as 25？C, which showed a similar tendency, much higher than that of the CSed coating tested at 25？C. The lubrication phase（graphite） improved the formation of a graphite film during sliding friction and decreased the COF, while the hard Ni-Al intermetallic phases contributed to the increase of COF.

关键词： Cold spraying Ni-coated graphite powder Post-spray heat-treatment Intermetallics Tribological performance

Micro-nano structured functional coatings deposited by liquid plasma spraying

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Journal of Advanced Ceramics 2020年第5期9卷 517-534页

作者： Yuchun HUAN Kaidi WU Changjiu LI hanlin liao Marc DEBLIQUY Chao ZHANG College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China ICB UMR 6303 CNRSUniversite de Bourgogne Franche-ComteUTBM90010 BelfortFrance Service de Science des Materiaux Faculte PolytechniqueUniversite de Mons7000 MonsBelgium

Inspired by the micro-nano structure on the surface of biological materials or living organisms,micro-nano structure has been widely investigated in the field of functional *** to its large specific surface area,porosity,and dual-scale structure,it has recently attracted special *** typical fabrication processes of micro-nano structured coatings include sol-gel,hydrothermal synthesis,chemical vapor deposition,*** paper presents the main features of a recent deposition and synthesis technique,liquid plasma spraying(LPS).LPS is an important technical improvement of atmospheric plasma *** with atmospheric plasma spraying,LPS is more suitable for preparing functional coatings with micro-nano ***-nano structured coatings are mainly classified into hierarchical-structure and *** present study reviews the preparation technology,structural characteristics,functional properties,and potential applications of LPS coatings with a micro-nano *** micro-nano structured coatings obtained through tailoring the structure will present excellent performances.

关键词： liquid plasma spraying(LPS) composite spraying micro-nano structure functional coatings

Highly sensitive ZnO nanoparticles-loaded In2O3 hollow microsphere for detecting ppb-level NO2 at low working temperature

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Progress in Natural Science:Materials International 2020年第4期30卷 469-476页

作者： Chao Zhang Dongjin Sun Yuchun Huan Kaidi Wu hanlin liao College of Mechanical Engineering Yangzhou University ICB UMR 6303 CNRS Univ.Bourgogne Franche-Comté

This paper presents a NO2sensor operating at low temperature, which was fabricated by ZnO nanoparticlesloaded In2O3hollow microspheres composites. SEM, XRD, XPS and HRTEM were executed to determine the morphology and microstructure of ZnO–In2O3. The sensing performance of pure In2O3and ZnO–In2O3composite sensors was tested. The NO2sensing properties of the composite were greatly improved in contrast with the pure In2O3sensor at the optimized operating temperature（75 °C）. ZnO–In2O3composite sensor exhibited an obviously higher response（805.2 for 100 ppb NO2） than that of the pure In2O3sensor（14 for 100 ppb NO2）. In particular, the response/recovery rate of ZnO–In2O3composite sensor was greatly improved in contrast with the pure In2O3sensor. The n-n heterojunctions created at ZnO–In2O3interfaces improved the sensing performance.

关键词： ZnO-In2O3 Hollow microspheres Gas sensor NO2 sensor Low operating temperature

Effect of Substrate Type on Deposition Behavior and Wear Performance of Ni-Coated Graphite/Al Composite Coatings Deposited by Cold Spraying

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Journal of Materials Science & Technology 2017年第4期33卷 338-346页

作者： Chunjie Huang Wenya Li Yingchun Xie Marie-Pierre Planche hanlin liao Ghislain Montavon ICB UMR 6303 CNRSUniversite Bourgogne Franche-ComteUTBMF-90100 BelfortFrance State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi'an 710072China

This work focused on the deposition characteristics and wear behavior of Ni-coated graphite mixed with40 vol.% Al（Ni-Gr/Al） composite coatings sprayed on an Al alloy and a steel substrate by cold spraying（CS）. The morphology of the flattened Ni-Gr particles was examined by single-impact tests. Crosssectional microstructure and wear performance of the Ni-Gr/Al composite coatings were studied. Results showed that a larger number of Ni-Gr particles were finally bonded with the steel substrate, whereas many craters existed on the Al alloy substrate after the single-impact tests. The coating on the steel substrate had a high thickness, high graphite content and low coeficient of friction（COF） compared to those on the Al alloy substrate. In addition, the CS coatings presented a homogeneous distribution and uniform morphology of graphite, and a comparative COF to that of conventional thermal sprayed coatings. It was shown that CS could avoid the decomposition and transformation of graphite phase.

关键词： Cold spraying Ni-coated graphite Deposition behavior Microstructure Wear performance

Well-designed g-C_(3)N_(4)nanosheet incorporated Ag loaded Er_(0.05)La_(0.95)FeO_(3)heterojunctions for isoamyl alcohol detection

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Journal of Advanced Ceramics 2024年第6期13卷 736-745页

作者： Kaichun Xu Mengjie Han Zichen Zheng Zexin Yu hanlin liao Hui Sun Chao Zhang College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China Institute for Manufacturing Technologies of Ceramic Components and Composites(IMTCCC) University of StuttgartStuttgart 70569Germany ICB UMR 6303 CNRSUniv.Bourgogne Franche-ComtéUTBMBelfort 90010France School of Space Science and Physics Shandong UniversityWeihai 264209China

Because the volatile content of isoamyl alcohol increases sharply on the seventh day of wheat mildew infection,isoamyl alcohol can be used as an early biomarker of wheat mildew ***,only a few sensors for isoamyl alcohol detection have been reported,and these sensors still suffer from low sensitivity and poor moisture ***,the isoamyl alcohol sensitivity of 5 at%Er@LaFeO_(3)(ELFO)was enhanced by loading Ag nanoparticles on the surface of the ELFO microspheres,while the optimal operating temperature was *** moisture resistance of Ag/ELFO was improved by the incorporation of g-C_(3)N_(4)nanosheets(NSs)on the surface of Ag/ELFO through electrostatic *** the requirements for practical applications in grain granaries,the sensing behavior of a Ag/ELFO-based sensor incorporating g-C_(3)N_(4)NSs at 20%relative humidity(RH)was systematically studied,and the sensor demonstrated excellent repeatability,long-term stability,and superior selectivity(791 at 50 ppm)for isoamyl alcohol with a low limit of detection(LOD=75 ppb).Furthermore,the practical results obtained for wheat at different mildew stages further confirmed the potential of the g-C_(3)N_(4)/Ag/ELFO-based sensor for monitoring the early mildew stage of *** work may offer guidance for enhancing the moisture resistance of gas-sensitive materials through the strategy of employing composite nanomaterials.

关键词： Ag gas sensor moisture resistance isoamyl alcohol Er@LaFeO_(3)(ELFO) g-C_(3)N_(4)nanosheet(NS)

Three dimensional dendritic morphology and orientation transition induced by high static magnetic field in directionally solidified Al-10wt.%Zn alloy

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Journal of Materials Science & Technology 2019年第8期35卷 1587-1592页

作者： Sansan Shuai Xin Lin Yuanhao Dong Long Hou hanlin liao Jiang Wang Zhongming Ren State Key Laboratory of Advanced Special Steel School of Materials Science and EngineeringShanghai UniversityShanghai 200444 China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072 China Université de Technologie de Belfort-Montbéliard LERMPS Site de Sévenans90010 Belfort Cedex France

Effect of high static magnetic field on the dendritic morphology and growth direction in directionally solidified Al-10 wt.%Zn alloy were studied by three-dimensional(3D) X-ray micro-computed tomography, Electron Back-scattered Diffraction(EBSD) and X-ray Diffraction(XRD). The application of high static axial magnetic field(5T) during directional solidification was found to destabilize the solid/liquid interface and cause the growth direction of dendrite deviate from thermal gradient, leading to irregular solid/liquid interfacial shape and cellular to dendritic morphology transition. The thermoelectric magnetic convection(TEMC) caused by the interaction of thermoelectric effect and magnetic field was supposed to be responsible for the transition. In addition, the EBSD and XRD results confirm that the preferred growth direction of α-Al was found to transform from the traditionally expected to. The dendrite orientation transition(DOT) in Al-10 wt.%Zn alloy can be attributed to the effect of applied magnetic field on the anisotropy of crystal during solidification. The result indicates the potential application of high static magnetic field in altering the morphology and preferred growth direction of dendrite during directional solidification.

关键词： Al-Zn alloy High static magnetic field Three-dimensional dendrite morphology Dendrite orientation transition X-ray computed tomography

Performance of plasma-sprayed CuNiIn coatings and Mo coatings subjected to fretting fatigue

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Nano Materials Science 2020年第2期2卷 140-150页

作者： Shujuan Dong Yihui Wang Jinyan Zeng Xiong Yang Panpan Liang Dezheng Wang Huiqi liao hanlin liao State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan430070China University Bourgogne Franche-Comte IRTES EA7274F-90100BelfortFrance

During atmospheric plasma spraying,a cooling process usually plays an important role in the coating quality,especially for the oxidation containment of metallic *** and Mo coatings were prepared using atmospheric plasma spraying with different cooling *** obtained coatings were characterized in terms of microstructure,microhardness and tensile *** relation between the coating microstructure and their fretting fatigue behavior was *** results show that the sensitivity of Mo coatings to the cooling process is lower than CuNiIn *** resistance to fretting fatigue is determined by the coating microhardness,correlated with the contents of oxides and *** fretting wear mechanisms of both the coatings are galling,third body abrasive wear and material transfer.

关键词： CuNiIn coatings Mo coatings Atmospheric plasma spraying Fretting fatigue

A novel multi-channel porous structure facilitating mass transport towards highly efficient alkaline water electrolysis

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Journal of Energy Chemistry 2024年第6期93卷 511-518,I0013页

作者： Xinge Jiang Vasileios Kyriakou Chen Song Xianbin Wang Sophie Costil Chunming Deng Taikai Liu Tao Jiang hanlin liao Universitéde technologie de Belfort Montbéliard Centre national de la recherche scientifiqueLaboratoire Interdisciplinaire Carnot de BourgogneBelfort 90010France Department of Chemical Engineering Engineering and Technology Institute Groningen(ENTEG)University of GroningenGroningen 9747 AGThe Netherlands The Institute of New Materials Guangdong Academy of ScienceGuangzhou 510650GuangdongChina

An advantageous porous architecture of electrodes is pivotal in significantly enhancing alkaline water electrolysis(AWE)efficiency by optimizing the mass transport *** effect becomes even more pronounced when aiming to achieve elevated current ***,we employed a rapid and scalable laser texturing process to craft novel multi-channel porous ***,the obtained electrodes exhibit the lowest Tafel slope of 79 mV dec^(-1)(HER)and 49 mV dec^(-1)(OER).As anticipated,the alkaline electrolyzer(AEL)cell incorporating multi-channel porous electrodes(NP-LT30)exhibited a remarkable improvement in cell efficiency,with voltage drops(from 2.28 to 1.97 V)exceeding 300 mV under 1 A cm^(-1),compared to conventional perforated Ni plate *** enhancement mainly stemmed from the employed multi-channel porous structure,facilitating mass transport and bubble dynamics through an innovative convection mode,surpassing the traditional convection ***,the NP-LT30-based AEL cell demonstrated exceptional durability for 300 h under 1.0 A cm^(-2).This study underscores the capability of the novel multi-channel porous electrodes to expedite mass transport in practical AWE applications.

关键词： Alkaline water electrolysis Mass transport Bubble dynamics Innovative convection mode Multi-channel porous structure