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Phase orientation improved the corrosion resistance and conductivity of Cr_(2)AlC coatings for metal bipolar plates

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Journal of Materials Science & Technology 2022年第10期105卷 36-44页

作者： Guanshui Ma Dong Zhang Peng Guo Hao Li Yang Xin Zhenyu wang aiying wang Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Ningbo Institute of Industrial Technology Ningbo 315201China

In view of the M_(n+1)AX_(n)(MAX)phase coatings benefting the adaptive passivation flm for good corrosion resistance and high electronic density of states for excellent electrical conductivity,here,we reported the Cr_(2)Al C MAX phase coatings with different preferred orientations by a homemade technique consisting of vacuum arc and magnetron sputtering.The dependence of surface and interface microstructural evolution upon the corrosion and electrochemical properties of deposited coating was focused.Results showed that all the Cr_(2)Al C coatings with different phase orientations greatly improved the performance of stainless steel(SS)316 L substrate.Specifcally,the lowest value of interface contact resistance(ICR)reached to 3.16 mΩcm^(2)and the lowest corrosion current density was 2×10^(-2)μA cm^(-2),which were much better than those of bare SS316L.The combined studies of electrochemical properties and theoretical calculations demonstrated that the Cr_(2)Al C coatings with preferred(103)orientation were easier to form oxide passivation flm on their surface to increase the corrosion resistance.

关键词： M_(n+1)AX_(n)phase coating Metal bipolar plate Interface contact resistance Corrosion resistance

Accelerated deterioration mechanism of 316L stainless steel in NaCl solution under the intermittent tribocorrosion process

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Journal of Materials Science & Technology 2022年第26期121卷 67-79页

作者： Yingrui Liu Linlin Liu Shuyu Li Rujia wang Peng Guo aiying wang Peiling Ke Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China

In this research,the tribocorrosion behavior of 316L stainless steel in simulated seawater was investigated under continuous and intermittent sliding at open circuit potential.The tribocorrosion mechanism was discussed in terms of wear morphologies,mechanical property as well as chemical composition.Meanwhile,microstructure evolution inside the wear track and open circuit potential recorded after sliding were analyzed to quantify the repassivation kinetics and evaluate the impact of the regenerated passive film on wear.The results showed that the wear rate increased under intermittent sliding when the pause time is long enough to repassivate after sliding.Repeated sliding promoted the refinement of the grain inside the sliding area,which was beneficial to the generation of the thicker and more compact passive film inside the wear track.The ruptured passive film often acted as abrasives during subsequent sliding.Therefore,the accelerated material loss under intermittent sliding was attributed to the periodic mechanical removal of the thickened passive film and the enhanced abrasive wear inside the wear track.

关键词： Stainless steel Tribocorrosion Passive film Repassivation Abrasive wear

MAX phase forming mechanism of M-Al-C(M=Ti,V,Cr)coatings:In-situ X-ray diffraction and first-principle calculations

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Journal of Materials Science & Technology 2023年第12期143卷 140-152页

作者： Jianghuai Yuan Zhenyu wang Guanshui Ma Xiaojing Bai Yong Li Xiaoying Cheng Peiling Ke aiying wang Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China School of Materials Science and Engineering Anyang Institute of TechnologyAnyang 455000China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

The interesting hybrid properties of ceramics and metals induced by unique nano-laminated structures make the M_(n+1)AX n(MAX)phase attractive as a potential protective coating for vital structural compo-nents in harsh systems.However,an extremely narrow phase-forming region makes it difficult to prepare MAX phase coatings with high purity,which is required to obtain coatings with high-temperature anti-oxidation capabilities.This work describes the dependence of the phase evolution in deposited M-Al-C(M=Ti,V,Cr)coatings as a function on temperature using in-situ X-ray diffraction analysis.Compared to V_(2)AlC and Cr_(2)AlC MAX phase coatings,the Ti_(2)AlC coating displayed a higher phase-forming tempera-ture accompanied by a lack of any intermediate phases before the appearance of the Ti_(2)AlC MAX phase.The results of the first-principle calculations correlated with the experience in which Ti_(2)AlC exhibited the largest formation energy and density of states.The effect of the phase compositions of these three MAX phase coatings on mechanical properties were also investigated using ex-situ Vickers and nano-indenter tests,demonstrating the improved mechanical properties with good stability at high temperatures.These findings provide a deeper understanding of the phase-forming mechanism of MAX phase coatings to guide the preparation of high-purity MAX phase coatings and the optimization of MAX phase coatings with expected intermediate phases such as Cr_(2)C,V_(2)C etc.,as well as their application as protective coat-ings in temperature-related harsh environments.

关键词： MAX phase coating Phase-formation mechanism In-situ X-ray diffraction First-principle calculations Mechanical properties

微弧氧化时间对锆合金表面MAO/Cr复合涂层结构与性能的影响

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金属学报 2024年第5期60卷 691-698页

作者：王郑王振玉汪爱英杨巍柯培玲中国科学院宁波材料技术与工程研究所、中国科学院海洋新材料与应用技术重点实验室宁波315201 中国科学院大学材料与光电研究中心北京100049 西安工业大学材料与化工学院西安710021

自福岛核事故发生以来,事故容错燃料包壳涂层受到了广泛关注。本工作通过微弧氧化(MAO)和高功率脉冲磁控溅射(HiPIMS)2种技术在Zirlo锆合金基体上制备了MAO/Cr复合涂层,研究了微弧氧化时间对MAO/Cr复合涂层微观结构、力学性能以及抗高... 详细信息

自福岛核事故发生以来,事故容错燃料包壳涂层受到了广泛关注。本工作通过微弧氧化(MAO)和高功率脉冲磁控溅射(HiPIMS)2种技术在Zirlo锆合金基体上制备了MAO/Cr复合涂层,研究了微弧氧化时间对MAO/Cr复合涂层微观结构、力学性能以及抗高温水蒸气氧化性能的影响。结果表明:当微弧氧化时间由3 min增加到9 min时,复合涂层表面(200)织构系数由83%增加到100%;随着微弧氧化时间的增加,复合涂层的断裂韧性呈先增大后减小的趋势,在6 min时达到峰值4.64 MPa·m^(1/2);经900℃水蒸气氧化1 h后,复合涂层体系均产生明显分层,其中MAO3min/Cr与MAO6min/Cr复合涂层增重幅度较小,而MAO9min/Cr复合涂层增重幅度较大,并在表截面形成大量微裂纹。当微弧氧化时间为6 min时,制备的复合涂层具有出色的力学性能和优异的抗高温水蒸气氧化性能。

关键词：微弧氧化高功率脉冲磁控溅射微观结构力学性能抗高温水蒸气氧化

Long-term tribocorrosion resistance and failure tolerance of multilayer carbon-based coatings

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Friction 2022年第10期10卷 1707-1721页

作者： Hao LI Linlin LIU Peng GUO Lili SUN Jing WEI Yingrui LIU Shuyu LI Shuyuan wang Kwang-Ryeol LEE Peiling KE aiying wang Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Computational Science Center Korea Institute of Science and TechnologySeoul 136-791Republic of Korea

Current tribocorrosion research of metallic materials and their surface protective coatings mainly focuses on their short-term properties,with test time of 0.5‒2.0 h and a sliding distance 50‒500 m,which may significantly deviate from the practical long-term service condition and thus cause a catastrophe of marine equipments.In this study,three carbon-based multilayer coatings(Ti/DLC,TiC_(x)/DLC,and Ti‒TiC_(x)/DLC)were deposited on S32750 substrates,and both short-term and long-term tribocorrosion behaviors were investigated.The experimental results indicate that the coatings substantially improve the tribocorrosion resistance of the S32750 stainless steel.During the short-term tribocorrosion test,TiC_(x)/DLC exhibited the best tribocorrosion resistance owing to its high hardness.During the long-term tribocorrosion test,however,Ti‒TiC_(x)/DLC coating indicated the best anti-tribocorrosion performance owing to its excellent fracture toughness together with high hardness.Moreover,under 5 N,Ti‒TiC_(x)/DLC can withstand a long-term test of more than 24 h.Additionally,under a higher load of 20 N,the Ti‒TiC_(x)/DLC with a corresponding sliding distance of approximately 1,728 m maintained a low friction coefficient of approximately 0.06.However,the coating was completely worn out;this is attributable to the formation of tribocorrosion products consisting of graphitized carbon and nanocrystalline Fe_(x)O_(y).

关键词： DLC multilayer structure long-term tribocorrosion failure tolerance

直流复合高功率脉冲磁控溅射VAlN-Ag涂层的宽温域摩擦特性研究

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摩擦学学报（中英文） 2024年第3期44卷 368-378页

作者：张玉鹏王振玉汪爱英柯培玲中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室浙江宁波315201 中国科学院宁波材料技术与工程研究所浙江省海洋材料与防护技术重点实验室浙江宁波315201

通过直流磁控溅射(DCMS)复合高功率脉冲磁控溅射(HiPIMS)技术制备了VAlN/VAlN-Ag复合涂层,调控HiPIMS靶功率控制Ag质量分数变化范围(11.4%、19.8%、24.5%),探究了涂层在25、300和650℃温度下的摩擦学性能.在室温摩擦条件下,3种涂层的摩... 详细信息

通过直流磁控溅射(DCMS)复合高功率脉冲磁控溅射(HiPIMS)技术制备了VAlN/VAlN-Ag复合涂层,调控HiPIMS靶功率控制Ag质量分数变化范围(11.4%、19.8%、24.5%),探究了涂层在25、300和650℃温度下的摩擦学性能.在室温摩擦条件下,3种涂层的摩擦系数均较高,当温度升高至300和650℃时,摩擦系数随Ag含量增加而降低,高Ag含量(质量分数24.5%)涂层摩擦系数最低,分别为0.45和0.23.磨损率随温度升高而增加,宽温域环境中,低Ag含量的S1(Ag质量分数为11.4%)涂层具有最优的力学性能和最低的磨损率,使复合涂层在宽温域内表现出良好的摩擦学性能.复合涂层的物相结构、元素价态和化学键在中低温摩擦环境中无明显变化;经650℃摩擦试验后,涂层表面发生摩擦化学反应,V和Ag元素的价态升高,生成层状结构的AgVO_(3)和Ag_(3)VO_(4)高温润滑相,有效降低涂层的摩擦系数.高温摩擦过程中伴随着元素扩散,涂层内部微结构演变成致密的Al_(2)O_(3)层包裹钒酸银润滑相的表层结构,V_(2)O_(5)和NiO这2种物相为主的中间层,以及Ti主导的过渡层结构.高温磨损机制表现为黏着磨损和氧化磨损.

关键词： HiPIMS技术 VAlN-Ag复合涂层宽温域摩擦润滑元素扩散

Preparation of Ti_2AlC MAX Phase Coating by DC Magnetron Sputtering Deposition and Vacuum Heat Treatment

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Journal of Materials Science & Technology 2015年第12期31卷 1193-1197页

作者： Zongjian Feng Peiling Ke aiying wang Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of Sciences

Due to the excellent corrosion resistance and high irradiation damage resistance,Ti 2AlC MAX phase is considered as a candidate for applications as corrosion resistant and irradiation resistant protective coating.MAX phase coatings can be fabricated through firstly depositing a coating containing the three elements M,A,and X close to stoichiometry of the MAX phases using physical vapor deposition,followed by heat treatment in vacuum.In this work,Ti-Al-C coating was prepared on austenitic stainless steels by reactive DC magnetron sputtering with a compound Ti （50）Al （50） target,and CH4 used as the reactive gas.It was found that the as-deposited coating is mainly composed of Ti 3AlC antiperovskite phase with supersaturated solid solution of Al.Additionally,the ratio of Ti/Al remained the same as that of the target composition.Nevertheless,a thicker thermally grown Ti 2AlC MAX phase coating was obtained after being annealed at 800℃ in vacuum for 1 h.Meanwhile,the ratio of Ti/Al became close to stoichiometry of Ti 2AlC MAX phases.It can be understood that owing to the higher activity of Al,it diffused quickly into the substrate during annealing,and then more stable Ti 2AlC MAX phases transformed from the Ti 3AlC antiperovskite phase.

关键词： Ti2AlC MAX phase Coating Magnetron sputtering Microstructure

Simulations of the Dependence of Gas Physical Parameters on Deposition Variables during HFCVD Diamond Films

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Journal of Materials Science & Technology 2006年第5期22卷 599-604页

作者： aiying wang Kwangryeol Lee Chao SUN Lishi WEN Future Technology Research Division Korea Institute of Science and Technology P.O.Box 131 CheongryangSeoul 130-650 Korea Plasma Lab J＆L Tech. Co. Ltd Siheung city Kyunggi-do 2185-7 Korea Department of Surface Engineering of Materials Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China

During the growth of the hot filament chemical vapor deposition （HFCVD） diamond films, numerical simulations in a 2-D mathematical model were employed to investigate the influence of various deposition parameters on the gas physical parameters, including the temperature, velocity and volume density of gas. It was found that, even in the case of optimized deposition parameters, the space distributions of gas parameters were heterogeneous due primarily to the thermal blockage come from the hot filaments and cryogenic pump effect arisen from the cold reactor wall. The distribution of volume density agreed well with the thermal round-flow phenomenon, one of the key obstacles to obtaining high growth rate in HFCVD process. In virtue of isothermal boundary with high temperature or adiabatic boundary condition of reactor wall, however, the thermal roundflow was profoundly reduced and as a consequence, the uniformity of gas physical parameters was considerably improved, as identified by the experimental films growth.

关键词： Gas physical parameters Simulations Diamond films HFCVD

Effect of Negatively Charged Ions on the Formation of Microarc Oxidation Coating on 2024 Aluminium Alloy

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Journal of Materials Science & Technology 2012年第8期28卷 707-712页

作者： Wei Yang Bailing Jiang aiying wang Huiying Shi Ningbo Key Laboratory of Marine Protec'tion Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Materials Science and Engineering Xi'an University of TechnologyXi'an 710048China

The present study deals with the effect of negatively charged ions on the ceramic coating formation on 2024 aluminium alloy during microarc oxidation （MAO） process. On the basis of the experimental results, two steps （the formation of an incipient film without arc presence and the growth of a ceramic coating with arc discharge） of MAO process have been observed. For comparison, four different negatively charged ions studied. It is proved that negatively charged ions strongly participated in the formation of an incipient film with high impedance value at the first step. The growth of ceramic coating depends on the combination between AI of the substrate and O from the electrolyte, and the negatively charged ions are little consumed. As an anodic oxide coating is prepared on the sample surface instead of the incipient film, the first step occurs easily and the growth of ceramic coating is accelerated. Furthermore, the mechanism of negatively charged ions in the formation of the MAO coating has been proposed.

关键词： Aluminium alloy Microarc oxidation Incipient film Ceramic coating Negativelycharged ions