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Journal of Materials Science & Technology 2020年第13期47卷 163-174页

作者： Jing Zhong Lijun Zhang Xiaoke Wu Li Chen chunming deng State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Guangdong Institute of New Materials National Engineering Laboratory for Modern Materials Surface Engineering Technology&The Key Lab of Guangdong for Modern Surface Engineering TechnologyGuangzhou 510651China

In this work,a novel computational framework for establishment of atomic mobility database directly from the experimental composition profiles and its uncertainty quantification was developed by merging the Bayesian inference with the Markov chain Monte Carlo algorithm into the latest version of the Hit DIC *** treating the simulation of composition profiles with the composition-dependent coefficients as the forward problem,the inverse coefficient problem that provides the potential way to compute the atomic mobilities directly from composition profiles can be *** values and uncertainties of the atomic mobility parameters of interest were assessed by means of Bayesian inference,where the composition profiles were consumed *** tests that consider the number of diffusion couples and the noise levels were *** application of the current framework in determination of atomic mobility descriptions of fcc Ni-Ta and Ni-Al-Ta alloys was *** discussion about the results of the benchmark tests and practical study case indicated that the present computational framework together with numbers of composition profiles from the multiple diffusion couples can help to establish the high-quality atomic mobility database of the target multicomponent alloys.

关键词： Atomic mobility Uncertainty HitDIC Bayesian inference Multicomponent alloys

7YSZ coating prepared by PS-PVD based on heterogeneous nucleation

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Chinese Journal of Aeronautics 2018年第4期31卷 820-825页

作者： Ziqian deng Xiaofeng ZHANG Kesong ZHOU Min LIU chunming deng Jie MAO Zhikun CHEN School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China National Engineering Laboratory for Modern Materials Surface Engineering Technology & the Key Lab of Guangdong for Modern Surfuce Engineering Technology Guangdong Institute of New Materials Guangzhou 510650 China School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China

Plasma spray-physical vapor deposition（PS-PVD） as a novel coating process based on low-pressure plasma spray（LPPS） has been significantly used for thermal barrier coatings（TBCs）.A coating can be deposited from liquid splats, nano-sized clusters, and the vapor phase forming different structured coatings, which shows obvious advantages in contrast to conventional technologies like atmospheric plasma spray（APS） and electron beam-physical vapor deposition（EBPVD）. In addition, it can be used to produce thin, dense, and porous ceramic coatings for special applications because of its special characteristics, such as high power, very low pressure, etc. These provide new opportunities to obtain different advanced microstructures, thus to meet the growing requirements of modern functional coatings. In this work, focusing on exploiting the potential of gas-phase deposition from PS-PVD, a series of 7 YSZ coating experiments with various process conditions was performed in order to better understand the deposition process in PS-PVD, where coatings were deposited on different substrates including graphite and zirconia. Meanwhile, various substrate temperatures were investigated for the same substrate. As a result, a deposition mechanism of heterogeneous nucleation has been presented showing that surface energy is an important influencing factor for coating structures. Besides, undercooling of the interface between substrate and vapor phase plays an important role in coating structures.

关键词： 7YSZ Deposition mechanism Heterogeneous nucleation PS-PVD TBC

Yttria-stabilized-zirconia hollow spheres prepared by atmospheric plasma spray

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Particuology 2014年第3期12卷 57-62页

作者： Xiaofeng Zhang Kesong Zhou Fa Chang Chen Song chunming deng Siyuan Liang School of Materials Science and Engineering South China University of Technology Institute of New Materials Guangzhou Research Institute of Non-ferrous Metals School of Public Health Shandong University

Yttria-stabilized-zirconia （YSZ） hollow spheres are widely utilized for their novel physical and chemical properties. However, developing a simple and low-cost method for preparing such hollow spheres still remains a great challenge. In this paper, an atmospheric plasma spray （APS） method is introduced, and the formation mechanism of hollow 7YSZ （ZrO2-7wt%Y2O3） spheres is presented. The hollow sphere morphology was observed by scanning electron microscopy （SEM） when agglomerated and sintered 7YSZ powders were used. Additionally, additive composition changes, phase transformations, and the thermal behavior of 7YSZ powders were analyzed by energy dispersive spectroscopy （EDS）, X-ray diffractometry （XRD）, thermogravimetric analysis （TG） and differential scanning calorimeter analysis （DSC）. Furthermore, the phase transformations of agglomerated and sintered 7YSZ powders, 7YSZ hollow spheres that annealed at various temperatures for different times are analyzed.

关键词： Yttria-stabilized-zircooia Atmospheric plasma spray Spheroidization Phase transformation

Reaction Mechanism and Thermal Insulation Property of Al-deposited 7YSZ Thermal Barrier Coating

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Journal of Materials Science & Technology 2015年第10期31卷 1006-1010页

作者： Xiaofeng Zhang Kesong Zhou Wei Xu Jinbing Song chunming deng Min Liu School of Materials Science and Engineering South China University of Technology Institute of New Materials Guangzhou Research Institute of Non-ferrous Metals

To increase the performance and efficiency of thermal barrier coating （TBC）, it is important to improve the thermal insulation property. In this work, a columnar AI film was deposited at the top of 7 wt% yttria- stabilized zirconia （7YSZ） TBC by magnetron sputtering. A vacuum heat treatment was then carried out to improve the insulation property of Al-deposited TBC. Reaction mechanism of AI-ZrO2 system in AIdeposited TBC was studied by differential thermal analysis （DTA）. The phase structures of the assprayed TBC, the Al-deposited and vacuum-treated TBC were characterized. The microstructure evolution of M-deposited TBC was illustrated after vacuum heat treatment. And the insulation property of the assprayed TBC and treated TBC was compared. The results show that a multi-scaled layer, consisting of micron/ nano structured α-Al2O3 and AI3Zr grain was in situ synthesized at the top of 7YSZ coating via vacuum heat treatment. The TBC with the multi-scaled overlay has better insulation property than the asspraved TBC.

关键词： Thermal barrier coatingAl deposition Insulation propertyc α-alumina

Al-modification for PS-PVD 7YSZ TBCs to improve particle erosion and thermal cycle performances

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Journal of Advanced Ceramics 2022年第7期11卷 1093-1103页

作者： Xiaofeng ZHANG Ming LI Ao ZHANG Shuangquan GUO Jie MAO chunming deng Panpan WANG Changguang deng Junli FENG Min LIU Kesong ZHOU Cheng LAI National Engineering Laboratory for Modern Materials Surface Engineering Technology&the Key Lab of Guangdong for Modern Surface Engineering Technology Institute of New MaterialsGuangdong Academy of ScienceGuangzhou 510650China PERA Guangzhou Information Technology Co. Ltd.Guangzhou 510650China Chengdu Holy(Group)Industry Co. Ltd.Chengdou 610000China School of Aviation and Mechanical Engineering Changzhou Institute of TechnologyChangzhou 213032China Shenzhen Customs Industrial Products Inspection Technology Center Shenzhen 518067China

Plasma spray-physical vapor deposition(PS-PVD)as a novel process was used to prepare feather-like columnar thermal barrier coatings(TBCs).This special microstructure shows good strain tolerance and non-line-of-sight(NLOS)deposition,giving great potential application in ***,due to serious service environment of aero-engine,particle erosion performance is a weakness for PS-PVD 7YSZ *** a solution,an Al-modification approach was proposed in this *** in-situ reaction of Al and ZrO2,anα-Al2O3 overlay can be formed on the surface of 7YSZ columnar *** results demonstrate that this approach can improve particle erosion resistance since hardness improvement of Al-modified ***,as another important performance of thermal cycle,it has a better optimization with 350-cycle water-quenching,compared with the as-sprayed TBCs.

关键词： plasma spray-physical vapor deposition(PS-PVD) thermal barrier coatings(TBCs) Al-modification particle erosion resistance thermal cycle performance

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

Ductile and high strength Cu fabricated by solid-state cold spray additive manufacturing

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Journal of Materials Science & Technology 2023年第3期134卷 234-243页

作者： Chaoyue Chen Yingchun Xie Shuo Yin Wenya Li Xiaotao Luo Xinliang Xie Ruixin Zhao chunming deng Jiang Wang Hanlin Liao Min Liu Zhongming Ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Institute of New Materials Guangdong Academy of SciencesNational Engineering Laboratory of Modern Materials Surface Engineering TechnologyGuangdong Provincial Key Laboratory of Modern Surface Engineering TechnologyGuangzhou 510651China Trinity College Dublin The University of DublinDepartment of Mechanical and Manufacturing EngineeringParsons BuildingDublin 2Ireland State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding TechnologiesSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Key laboratory for Light-weight Materials Nanjing Techchnology UniversityNanjing 211816China ICB UMR 6303 CNRSUniv.Bourgogne Franche-ComtéUTBMF-90010 BelfortFrance

In this work,pure Cu with excellent strength and ductility(UTS of 271 MPa,elongation to fracture of 43.5%,uniform elongation of 30%)was prepared using cold spray additive manufacturing(CSAM),realizing a breakthrough in the *** in-depth investigation was conducted to reveal the microstructure evolution,strengthening and ductilization mechanisms of the CSAM Cu,as well as the single *** results show that the CSAM Cu possesses a unique heterogeneous microstructure with a bimodal grain structure and extensive infinitely circulating ring-mounted distribution of *** on the single splat observation,the entire copper particle forms a gradient nano-grained(GNG)structure after high-speed impact *** GNG-structured single splat serves as a unit to build the heterogeneous microstructure with bimodal grain distribution during the successive deposition in *** results also show that CSAM can achieve synergistic strengthening and ductilization by controlling the grain refinement and dislocation *** work provides potential for CSAM technique in manufacturing various metallic parts with the desired combination of high strength and good ductility without additional post-treatments.

关键词： Cold spray additive manufacturing Copper Heterogeneous microstructure Strength Ductility

Mechanism of vertical crack formation in Yb_(2)SiO_(5) coatings deposited via plasma spray-physical vapor deposition

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Journal of Materiomics 2020年第1期6卷 102-108页

作者： Xiaofeng Zhang Chao Wang Ruijun Ye chunming deng Xinghua Liang Ziqian deng Shaopeng Niu Jinbing Song Guo Liu Min Liu Kesong Zhou Jian Lu Junli Feng National Engineering Laboratory for Modern Materials Surface Engineering Technology Guangdong Institute of New MaterialsGuangzhou510650China Department of Mechanical Engineering City University of Hong KongHong KongChina Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science&TechnologyLiuzhou545000China Shenzhen Customs Industrial Products Inspection Technology Center Shenzhen518067China

Plasma spray-physical vapor deposition(i.e.,PS-PVD)is a promising method for obtaining advanced environmental barrier coatings(EBCs).The EBCs must meet some requirements in the application,in which the thermal cycle performance affects the service *** preparation of artificial vertical cracks in Yb_(2)SiO_(5) coatings is an effective approach for meeting the requirements above because vertical cracks provide a strain *** clarify the formation mechanism of vertical cracks during the PSPVD,the effects of coating thickness and substrate temperature on the formation of vertical cracks were *** addition,the interactions of spray powder and plasma flame during coating deposition were also characterized by optical *** is indicated that vertical cracks are formed due to a thermal expansion mismatch between Yb_(2)SiO_(5) and mullite coating,transient cooling after deposition and the nucleation of evaporated Yb_(2)SiO_(5) as well.

关键词： Environmental barrier coatings Yb_(2)SiO_(5)coating Vertical crack PS-PVD

喷涂角度对HVOF WC-Co-Cr涂层分布的影响（英文）

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稀有金属材料与工程 2017年第12期46卷 3583-3588页

作者：毛杰刘敏邓子谦邓畅光邓春明周克崧广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室广东广州510651

在喷涂复杂形状部件时,高速氧燃气(HVOF)喷涂焰流和基体表面几乎不可能固定一个角度。研究喷涂角度对涂层性质的影响是必要的,并研究了凹面曲率半径对沉积率的影响。实验使用团簇烧结的WC-10Co-4Cr粉末(粒度15~45μm)。实验时喷涂参数不... 详细信息

在喷涂复杂形状部件时,高速氧燃气(HVOF)喷涂焰流和基体表面几乎不可能固定一个角度。研究喷涂角度对涂层性质的影响是必要的,并研究了凹面曲率半径对沉积率的影响。实验使用团簇烧结的WC-10Co-4Cr粉末(粒度15~45μm)。实验时喷涂参数不变,喷涂半径为10,15,25 mm的凹面。结果表明,喷涂角度严重影响涂层沉积率。喷涂角度减小导致沉积率减少。当喷涂角度小于30°,涂层性质显著降低。涂层沉积分布和不同凹面半径的关系被推导。

关键词：喷涂角度厚度分布 WC-Co-Cr涂层 HVOF喷涂

Fabrication and Growing Kinetics of Highly Dispersed Gadolinium Zirconate Nanoparticles

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Research and Application of Materials Science 2019年第1期1卷 28-34页

作者： Renbo Zhu Jianpeng Zou Jie Mao Xiaofeng Zhang chunming deng Min Liu Wenlong Chen School of Materials Science and Engineering University of New South WalesSydneyAustralia State Key Laboratory of Powder Metallurgy Central South UniversityChangshaChina National Engineering Laboratory for Modern Materials Surface Engineering Technology&the Key Lab of Guangdong for Modern Surface Engineering Technology Guangdong Institute of New MaterialsGuangzhouChina Guangdong Industrial Analysis and Testing Center GuangzhouChina

Highly dispersed gadolinium zirconate(GZ)nanoparticles with fluorite structure were successfully synthesized by co-precipitation method,and their phase composition and microstructure,formation mechanism,and grain growth kinetics were *** results suggest that the nanoparticles were obtained through hydroxide dehydration and solid phase *** dispersion was accomplished by ethanol solvent to reduce the hydrogen bond and sodium dodecyl benzene sulfonate(SDBS)surfactant to increase the electrostatic repulsion between the *** grain growth activation energy of GZ powders calcined at lower temperature(1200°C)is 148.4 kJ/mol(Qh).The current study shows that the optimal process to synthesize dispersed GZ nanoparticles includes ethanol solvent,3 wt.%SDBS surfactant,and 1100°C as calcining temperature.

关键词： Gadolinium zirconate Co-precipitation method Phase structure Kinetics Dispersed nanoparticles