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Friction 2019年第5期7卷 444-456页

作者： Beibei ZHANG Jianzhang WANG Junya YUAN fengyuan yan State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Beijing100049China

The tribocorrosion failure mechanism of nickel-aluminium bronze(NAB) in different halide concentrations of seawater was studied using a pin-on-disc tribometer that was modified to conduct in-situ electrochemical detection during the sliding process. It has been reported that high-halide-concentration seawater provided a good lubricating effect, and thus reduced the coefficient of friction and wear rate of NAB during the tribocorrosion process. However, the existence of halide ions corroded the passive film and hindered the repassivation of the damaged areas in the wear track, resulting in an increased corrosion rate. In addition, the morphology of the wear scar revealed the occurrence of abrasive, delamination, and adhesive wear of NAB in seawater. For the whole range of halide concentration values, a positive synergy between wear and corrosion was proven, and the quantification of this synergy was discussed in detail. The results show that the corrosionwear synergism was decreased with increasing halide concentration in seawater, and the corrosion-induced wear was dominant in the two synergistic components.

关键词： tribocorrosion halide ions friction wear

Tribocorrosion properties of AISI 1045 and AISI 2205 steels in seawater: Synergistic interactions of wear and corrosion

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Friction 2021年第5期9卷 929-940页

作者： Beibei ZHANG Jianzhang WANG Hao LIU Yunfeng yan Pengfei JIANG fengyuan yan State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Tribocorrosion denotes an irreversible material degradation for several metallic components used in corrosive environments,and it arises from the interplay between chemical,mechanical,and electrochemical *** this study,some investigation has been performed to compare the tribocorrosion behavior of AISI 1045 steel and AISI 2205 duplex stainless steel sliding against an alumina pin in *** lowering in the open circuit potential(OCP)of AISI 2205 during the tribocorrosion demonstrates that its protective passive film was damaged by wear and resulted in a wear‐accelerated corrosion in the wear ***,sliding was found to accelerate the corrosion of the unworn areas for AISI 1045,leading to an anodic shift of the ***,the total material loss increased with an increase in the applied potential for both *** was revealed that AISI 1045 was more sensitive to corrosion under sliding than AISI ***,pure corrosion loss and corrosion‐induced wear constituted the primary reasons for the degradation of AISI 1045 at applied anodic potentials.

关键词： tribocorrosion passivation synergistic effect seawater

Effect of annealing treatment on microstructures,mechanical properties and cavitation erosion performance of high velocity oxy-fuel sprayed NiCoCrAlYTa coating

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Journal of Materials Science & Technology 2020年第18期52卷 19-31页

作者： Enkang Hao Yulong An Xia Liu Yijing Wang Huidi Zhou fengyuan yan State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics.Chinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Research Center of Modem Surface and Interface Engineering Anhui University of TechnologyMaanshan 340500China

The mechanical parts serving in the marine environment are up against the dual damage of corrosion and cavitation erosion,so the Ni Co Cr Al YTa coating with excellent corrosion resistance is successfully prepared by high velocity oxy-fuel(HVOF)sprayed technology to protect the equipment from *** chemical composition and mechanical properties as well as the microstructure evolution of the coating before and after annealing treatment are *** the same time,the influence of annealing treatment on the corrosion and cavitation erosion behaviors of the coating is investigated,as *** NiCoCrAlYTa coating mainly containsγ-Ni,β-Ni Al,andγ’-Ni3Al *** the deposition,the microcrystals or incomplete crystals generate in the interior of the coating because of the large temperature difference and impact ***,there is twin crystal structure in the as-spayed *** annealing treatment,the growth of grains and the segregation of reactive elements improve interface strength and inhibit the formation of micro-defects in the *** annealing temperature is of significance to the microstructure,mechanical properties,anti-corrosion and cavitation erosion resistance of the *** study provides a combined approach toward improving the corrosion and cavitation erosion resistance of NiCoCrAlYTa coatings.

关键词： iCoCrAlYTa coatings Annealing treatment Microstructure Mechanical properties Cavitation erosion

In-situ formation of layer-like Ag_(2)MoO_(4)induced by high-temperature oxidation and its effect on the self-lubricating properties of NiCoCrAlYTa/Ag/Mo coatings

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Journal of Materials Science & Technology 2021年第16期75卷 164-173页

作者： Enkang Hao Yulong An Jie Chen Xiaoqin Zhao Guoliang Hou Jianmin Chen Meizhen Gao fengyuan yan State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China China Academy of Ordnance Science Ningbo Branch Ningbo 315103China Key Lab for Magnetism and Magnetic Materials of MOE School of Physical Science and TechnologyLanzhou UniversityLanzhou 730000China

Ag-Mo-O ternary oxide has attracted growing attention because of its potential as a solid lubricant at high *** work designs and prepares NiCoCrAlYTa/Ag/Mo composite coating,performed using high velocity oxy-fuel(HVOF)spraying *** environment temperature plays an important role in the microstructure and phases as well as lubricant properties of NiCoCrAlYTa/Ag/Mo *** the environment temperature is above 600℃,the outer diffusion and oxidation of Ag and Mo lead to the formation of Ag2 MoO4 on the coating ***-like Ag2 MoO4 could form a continuous lubricant film at 800℃and consequently let the composite coating present the best tribological ***,a small number of hard particles could play a good bearing role during friction and improve the tribological properties of the composite coating.

关键词： Microstructure evolution In-situ formation Ag_(2)MoO_(4) Layer-like structure High-temperature friction

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仿生岩土技术的研究进展

岩土工程学报 2023年第6期45卷 1200-1211页

作者：何稼黄鑫晏凤元王昊河海大学岩土力学与堤坝工程教育部重点实验室江苏南京210024

岩土体中生存的生物使用独特的生物机制与岩土体相互作用,以完成土中运动、生长、锚固和吸收养分等功能。这些生物机制可被岩土工程借鉴和利用。仿生岩土是从形态、行为和原理上研究生物机制,将其用于发展岩土工程理论、技术和装备,用... 详细信息

岩土体中生存的生物使用独特的生物机制与岩土体相互作用,以完成土中运动、生长、锚固和吸收养分等功能。这些生物机制可被岩土工程借鉴和利用。仿生岩土是从形态、行为和原理上研究生物机制,将其用于发展岩土工程理论、技术和装备,用来解决岩土工程问题的新方向。近年来,仿生岩土技术逐渐成为了岩土工程界的一个引人注意的课题,并取得了一些进展。首先,介绍了仿生岩土技术的设计思路和过程以及主要研究方法。然后,总结并分析了不同生物机制在土中贯入与掘进、土与结构相互作用接触面和土中锚固系统等方面的研究现状和进展,其中典型的生物机制包括生物土中运动、蛇腹鳞摩擦各向异性和树木根系结构等。最后探讨了仿生岩土技术所面临的挑战和未来展望。

关键词：仿生岩土技术掘进仿生自主贯入探测器土与结构接触面性质锚固系统

Experimental study on self-burrowing dual anchor soft probe

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Biogeotechnics

Biogeotechnics 2024年第3期2卷 28-34页

作者： Jia He Hao Wang Xin Huang fengyuan yan Key Laboratory of Ministry of Education for Geomachanics and Embankment Engineering Hohai UniversityNanjing 210098China

This study focuses on the development and testing of a bio-inspired self-burrowing dual anchor soft probe for potential geotechnical *** anchor refers to the form of movement in soils in which some bivalve molluscs adopted by alternately generating anchoring effects in the soil through shell expansion and fluid-filled *** mimicking this mechanism,this study used pneumatic artificial muscles as soft actuators and developed an autonomous burrowing *** structure and the performance of the actuators and the probe were investigated and *** burrowing-out process of the dual anchor probe was not a simple upward ***,it rose in the inflation phase and slipped downward in the deflation *** difference between the two was a stride in one single *** the sands with relative densities of 30%,50%,and 80%,the total slips accounted for 18.8%,19.6%,and 26.9%of the total upward movements,***,the entire movement process showed a reciprocating upward *** burrowing process could be divided into a restricted stage and a free stage according to whether shear failure occurs in the overlying soil *** the soil density was high,the initial stage of burrowing was in a restricted *** amount of rise and slip were at a low level and increased slowly as the number of cycles *** the burrowing process was in the free stage,the increase was basically stable at a high value and accompanied by small slips.

关键词： Soft probe Self-burrowing Sand Soil investigation

铜包石墨填充PTFE基复合材料摩擦学特性的研究

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摩擦学学报 1999年第1期19卷 7-11页

作者：阎逢元李飞刘维民刘承业中国科学院兰州化学物理研究所固体润滑开放实验室淮海工学院机械系

研究了铜包石墨和铜／石墨混合填充ＰＴＦＥ基复合材料的微观结构、力学性能及摩擦学特性．结果表明，铜包石墨填充ＰＴＦＥ复合材料的抗压缩性能、抗拉伸性能以及耐磨性能均优于铜／石墨混合填充ＰＴＦＥ复合材料，其原因在于铜包石墨... 详细信息

研究了铜包石墨和铜／石墨混合填充ＰＴＦＥ基复合材料的微观结构、力学性能及摩擦学特性．结果表明，铜包石墨填充ＰＴＦＥ复合材料的抗压缩性能、抗拉伸性能以及耐磨性能均优于铜／石墨混合填充ＰＴＦＥ复合材料，其原因在于铜包石墨既增强了填料与ＰＴＦＥ的界面结合强度，又保证了ＰＴＦＥ连续相的完整性．此外，石墨表面铜包敷层的结构疏松、晶粒细小。

关键词： PTFE基复合材料铜包石墨界面摩擦学性能

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载荷对304不锈钢微动磨损性能的影响

摩擦学学报 2016年第5期36卷 555-561页

作者：范娜王云霞王秋凤阎逢元中国科学院兰州化学物理研究所固体润滑国家重点实验室甘肃兰州730000 中国科学院中科院大学北京100049

采用SRV-IV微动摩擦磨损试验机,研究了在干摩擦和水介质润滑条件下,载荷对304不锈钢微动磨损行为的影响,用扫描电子显微镜(SEM)和X射线能谱(EDS)对磨损表面形貌和成分进行分析.结果显示:载荷和介质对微动摩擦行为和磨损机理有显著影响.... 详细信息

采用SRV-IV微动摩擦磨损试验机,研究了在干摩擦和水介质润滑条件下,载荷对304不锈钢微动磨损行为的影响,用扫描电子显微镜(SEM)和X射线能谱(EDS)对磨损表面形貌和成分进行分析.结果显示:载荷和介质对微动摩擦行为和磨损机理有显著影响.在干摩擦下,载荷明显改变了微动运行区域,当载荷增大到50 N时微动运行区域由滑移区变为部分滑移区.摩擦系数和磨痕深度随着载荷的增加依次减小.磨损机理由黏着、磨粒和氧化磨损转变为局部疲劳和轻微氧化.同干摩擦相比,由于水介质的润滑和冷却作用,表面黏着被抑制,摩擦系数显著减小,两接触面间易滑移,部分滑移区消失.随载荷的增大磨痕深度增大,因腐蚀与磨损的交互作用,在海水中的磨痕深度比去离子水中略大.磨损机理主要为磨粒磨损和轻微的腐蚀磨损.

关键词： 304不锈钢微动磨损载荷介质

ATP-TiO_(2)杂化材料形貌对UHMWPE复合材料微动磨损性能的影响

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摩擦学学报 2022年第5期42卷 990-1000页

作者：孟兆洁王云霞阎逢元李楠中国科学院兰州化学物理研究所固体润滑国家重点实验室甘肃兰州730000 中国科学院大学北京100049 苏州热工研究院有限公司广东深圳518000

以钛酸四丁酯为前驱体,凹凸棒石(ATP)为载体,分别采用溶胶凝胶法和蒸汽法制备了两种不同形貌的凹凸棒石-二氧化钛(ATP-TiO_(2))杂化材料,并以质量分数为5%的含量填充超高分子量聚乙烯(UHMWPE).通过对比相同微动摩擦条件下超高分子量聚... 详细信息

以钛酸四丁酯为前驱体,凹凸棒石(ATP)为载体,分别采用溶胶凝胶法和蒸汽法制备了两种不同形貌的凹凸棒石-二氧化钛(ATP-TiO_(2))杂化材料,并以质量分数为5%的含量填充超高分子量聚乙烯(UHMWPE).通过对比相同微动摩擦条件下超高分子量聚乙烯、凹凸棒石及凹凸棒石-二氧化钛杂化填料填充超高分子量聚乙烯复合材料的摩擦学性能,探究了凹凸棒石-二氧化钛杂化材料微观形貌影响复合材料微动磨损性能的机理.结果表明:杂化材料的耐热性能较凹凸棒石有显著提升;蒸汽法制备ATP-TiO_(2)杂化材料的比表面积更大,在基体中分散更均匀,与基体的界面结合性更好,在摩擦过程中能够有效地承载,并促进转移膜的生成,其改性的复合材料表现出最低的摩擦系数和磨损率.

关键词：凹凸棒石二氧化钛超高分子量聚乙烯微动界面结合

热处理对石墨填充高岭土基矿物聚合物复合材料摩擦学性能的影响

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润滑与密封 2007年第8期32卷 106-110页

作者：李海红阎逢元烟台大学环境与材料工程学院山东烟台264005 中国科学院兰州化学物理研究所甘肃兰州730000

对20%石墨填充高岭土基矿物聚合物复合材料在不同温度下进行热处理,利用扫描电镜、X射线衍射和红外光谱等表征手段及显微硬度实验、三点弯曲实验,研究了材料的微观结构、机械性能及摩擦学性能与热处理温度之间的关系。结果表明,随热处... 详细信息

对20%石墨填充高岭土基矿物聚合物复合材料在不同温度下进行热处理,利用扫描电镜、X射线衍射和红外光谱等表征手段及显微硬度实验、三点弯曲实验,研究了材料的微观结构、机械性能及摩擦学性能与热处理温度之间的关系。结果表明,随热处理温度的提高,材料的微观结构发生较大变化,材料的显微硬度和弯曲强度均呈现先下降后又缓慢上升的趋势;材料经300℃和600℃的高温处理后仍具有较好的摩擦学性能,处理温度较低时,材料的磨损形式以磨粒磨损和粘着磨损为主;处理温度较高时,磨损形式以磨粒磨损和疲劳磨损为主。

关键词：高岭土矿物聚合物热处理摩擦学性能力学性能