检索结果-南通市图书馆

Nanostructured lubricant additives for titanium alloy:Lubrication by the solid-liquid interface with Coulomb repulsion

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2024年第7期12卷 1564-1579页

作者： Linlin duan Dan JIA Jian LI Jianfang LIU haitao duan State Key Laboratory of Special Surface Protection Materials and Application Technology Wuhan Research Institute of Materials ProtectionWuhan 430030China Hubei Longzhong Laboratory Xiangyang 441000China College of Life Science and Technology Wuhan Polytechnic UniversityWuhan 430030China

In this work,the advantage of Coulomb repulsion in the intermolecular forces experienced by molecules on the solid–liquid nanosized contact interface is taken,and the superior friction-reducing property of Cu_(3)(PO_(4))2·3H_(2)O(CuP)oil-based additives has been confirmed for titanium ***-dimensional(3D)CuP nanoflowers(CuP-Fs)with a strong capillary absorption effect are prepared to achieve the homogeneous mixing of solid CuP and lubricating *** by CuP-Fs additives for titanium alloy,friction coefficient(COF)can be reduced by 73.68%,and wear rate(WR)reduced by 99.69%.It is demonstrated that the extraordinary friction-reducing property is due to the repulsive solid–liquid interface with low viscous shear force originating from Coulomb repulsion between polar water molecules in CuP and non-polar oil ***,any steric hindrance or connection between this repulsive solid–liquid interface will trigger the adhesion and increase the viscous shear force,for example,dispersant,hydrogen bondings,and shaky adsorbed water ***,the lamellar thickness of CuP and the molecular size of lubricant both have a great influence on tribological *** the lubrication mechanism based on interface Coulomb repulsion is proposed that may help broaden the scope of the exploration in low-friction nanomaterial design and new lubricant systems.

关键词： lubrication nanomaterial additive solid-liquid interface wear

外加磁场对摩擦副材料摩擦磨损及抗腐蚀性能影响的研究进展

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料导报 2025年第2期39卷 156-174页

作者：周祎伟段海涛李健马利欣李文轩尤锦鸿贾丹湖北隆中实验室湖北襄阳441106 中国机械总院集团武汉材料保护研究所有限公司特种表面保护材料及应用技术国家重点实验室武汉430030

随着测控设备和机械装备所处电磁环境的日益复杂,越来越多的摩擦副材料在磁场环境下工作服役,外加磁场对摩擦副材料摩擦磨损及腐蚀性能的影响对指导涉磁场机械装备的安全、可靠、长寿命运行有着重要意义。本文系统总结了外加磁场对金属... 详细信息

随着测控设备和机械装备所处电磁环境的日益复杂,越来越多的摩擦副材料在磁场环境下工作服役,外加磁场对摩擦副材料摩擦磨损及腐蚀性能的影响对指导涉磁场机械装备的安全、可靠、长寿命运行有着重要意义。本文系统总结了外加磁场对金属和聚合物两种常用摩擦副材料摩擦磨损性能影响的作用机理,梳理并分析了磁场强度、磁场方向和频率等磁场参数对金属和聚合物摩擦副材料摩擦磨损性能的影响形式及程度,归纳了腐蚀过程中外加磁场对摩擦副材料的腐蚀起到促进或抑制作用的本质原因,对比分析了磁场强度、磁场方向等对摩擦副材料的腐蚀速度、极化曲线、腐蚀产物形貌造成不同程度的影响,概述了磁场条件下分子动力学模拟的研究进展,最后提出了现有研究中存在的不足,并对外加磁场条件下,尤其对涉水环境中摩擦副材料磨损和腐蚀交互作用的研究提出了展望。

关键词：磁场环境摩擦磨损性能腐蚀性能磨损和腐蚀交互作用分子动力学模拟

Tribological performance of TiAlSiN and TiAlCrN/TiAlN coating blades

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2014年第2期57卷 345-350页

作者： TU JieSong duan haitao XU JianHua LI Jian R & D Center Wuhan Research Institute of Materials Protection

A new laboratory evaluation method for the coating blade was developed, and the tribological properties of coating blades with different Ti-based coatings were studied by UMT-2 tribometer. Comparison between the areas of scratches before and after the cutting experiment was used to evaluate the cutting performance of the blades. Results showed that friction coefficient of TiA1CrN/TiA1N coating was significantly lower than that of TiA1SiN coating. Analysis of the worn surface revealed that the TiA1SiN and TiAICrN/TiA1N coatings in the dry turning process exhibited sign of inhornogeneous adhesive wear and abrasive wear. TiA1CrN/TiA1N coating has a longer working life and better anti-wear property because of its duplex coating.

关键词： duplex coating wear mechanism NC blade adhesive wear

Development of Atmosphere-controlled Tribometer and Fail-safe Analysis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2012年第5期25卷 1052-1059页

作者： duan haitao PEI Zhaohui WU Yong TU Jiesong LI Jian Wuhan Research Institute of Materials Protection Wuhan 430030 China State Key Laboratory of Tribology Tsinghua University Beijing 100084 China

The design of existing tribometer mainly focuses on normal pressure and environmental conditions, and aims to measure the effect of load and speed on material performance. The effect of gas pressure and environmental condition on performance of materials is usually not considered. Thus, data from friction tests are not precise. In this paper, a new atmosphere tribometer is developed to study the tribological behavior of materials under severe rugged atmosphere. A fail-safe analysis is performed through reproducibility, comparability, and sensitivity tests. The tribometer allows tests to be performed in block-circle disc line contact, pin-circle disc line contact, and block-circle disc face contact configurations at controlled atmosphere and gas pressure. A self-centering plant is designed to settle the poor contact problem. A pin-on-disk test is conducted, and the test results indicate that the proposed design is efficient. A combined sealing style is introduced to control gas leaks. Compared with other sealing styles, the combined sealing is found to meet the experiment requirements best. And the reproducibility, comparability, and sensitivity tests validate the performance of the tribometer. The designed atmosphere tribometer reliably simulates the friction test under extremely harsh conditions, enhances the ability for material tribological properties test, and ensures accuracy of the tribological data.

关键词： tribometer atmosphere polymer tribological properties

Evalution of Thermal Oxidative Degradation of Trimethylol-propane Trioleate by TG/DTA/DSC

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2021年第2期36卷 280-288页

作者： ZHAN Wen duan haitao LI Xinxiang LI Jian YUAN Chengqing Wuhan Research Institute of Materials Protection China Academy of Machinery Science and TechnologyWuhan 430030China School of Energy and Power Engineering Wuhan University of TechnologyWuhan 430063China

In order to evaluate the thermal oxidation degradation behavior of lubricant with different antioxidants,the thermal kinetics equation based on the anlyses of thermogravimetry(TG),differential thermal analysis(DTA),and differential scanning calorimetry(DSC)was established,respectively,to calculate the activation energy of lubricant thermal-oxidative *** thermal analyses of TG and DTA were employed to determine the thermal decomposition properties of ester oils trimethylolpropane trioleate(TMPTO)with butyl-octyl-diphenylamine/octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate/amine-phenol combination *** activation energy of the lubricating oil adding antioxidant is increased relative to the TMPTO base oil,and the order of activation energy are Ec(93.732 kJ·mol^(-1))>Ed(88.71 kJ·mol^(-1))>Eb(58.41 kJ·mol^(-1))>Ea(46.32 kJ·mol^(-1)).The experimental results show that octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate in TMPTO has favorable resistance to thermal oxidation and *** thermal analysis method of DSC accurately reflects the heat exchange of lubricant thermal-oxidative *** order of activation energy is calculated to ED(144.385 kJ·mol^(-1))>EC(110.05 kJ·mol^(-1))>EB(97.187 kJ·mol^(-1))>EA(66.02 kJ·mol^(-1)).It is illustrated that the amine-phenol combination antioxidant has the best thermal oxidation resistance,which is the same as what the oxidation onset temperature effected.

关键词： thermal oxidative degradation thermal kinetics antioxidants trimethylolpropane oleate

在线全文

学校读者我要写书评

暂无评论

碱性锌镍镀液组成对镀层性能的影响

表面技术 2025年第4期54卷 130-142页

作者：丁运虎李雨昕胡遐林贺颖刘宏芳段海涛中国机械总院集团武汉材料保护研究所有限公司武汉430030 华中科技大学化学与化工学院武汉430074

目的获得绿色化、高稳定的碱性锌镍合金工艺,探索碱性代镉电镀锌镍工艺中单一组分参数对锌镍合金镀层性能的影响。方法在镍离子主络合剂C的碱性镀液中电沉积制备锌镍合金镀层。通过Hull Cell实验分析、电化学分析、扫描电镜分析等方法,... 详细信息

目的获得绿色化、高稳定的碱性锌镍合金工艺,探索碱性代镉电镀锌镍工艺中单一组分参数对锌镍合金镀层性能的影响。方法在镍离子主络合剂C的碱性镀液中电沉积制备锌镍合金镀层。通过Hull Cell实验分析、电化学分析、扫描电镜分析等方法,研究碱性锌镍合金体系中,其他条件一定时,镀液中锌离子、镍离子、络合剂C以及氢氧化钠含量分别对镀层厚度、镍含量、耐蚀性和微观结构的影响。结果实验结果表明,其他条件一定时,镀层镍含量与镀液中镍离子和络合剂C含量成正比,与锌离子和氢氧化钠含量成反比,镀层中镍含量远低于锌含量,在该碱性锌镍工艺体系中表现为异常共沉积;扫描电镜结果和电化学测试结果表明,其他条件一定时,当镍离子和络合剂C含量增加时,镀层的腐蚀电流密度减小,且腐蚀电流密度的最大值和最小值相差1个数量级,镀层越致密,表面形貌越好,锌离子含量和氢氧化钠含量增加时,镀层表面粗糙,结构疏松,其腐蚀电流密度增大,耐蚀性降低。结论在络合剂C的碱性锌镍工艺中,电沉积锌镍合金是一个异常共沉积的过程,在电流密度为1~5 A/dm2时镀层镍含量较稳定,镀液金属离子(锌、镍离子)变化对镀层镍含量的影响较大,控制镀液中锌镍离子含量,镀层镍含量可稳定在12%~15%(质量分数)。镀液中各组分单一浓度变化,使镀层镍含量、形貌发生变化,对镀层耐蚀性产生影响。当其他条件一定时,镀液镍离子﹑锌离子﹑络合剂C和氢氧化钠含量分别为1.6 g/L、7 g/L、140 mL/L、80 g/L,镀层表面较平整,孔洞和裂纹较少,镀层的耐蚀性最好。

关键词：锌镍合金碱性电镀镀层厚度及镍含量耐蚀性微观形貌

Tribological and economic evaluation of recycled mineral lubricating oils

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第12期56卷 2964-2972页

作者： LIU JianFang GU KaLi duan haitao ZHAO Yuan LI Jian Wuhan Research Institute of Materials Protection Wuhan Polytechnic University

Seven kinds of used mineral lubricating oils,including hydraulic oils,film bearing oils,steam turbine oil and gear oils,were recycled by reclamation and adding *** and chemical properties of the recycled oils were measured and their lubrication performances were evaluated by the original and modified four-ball *** surfaces were analyzed by energy dispersive X-ray spectroscopy and Raman *** recycling costs of burning,re-refined and refortified were *** showed that physical and chemical properties of the refortified oils were improved effectively and became in the industrial access *** the different friction materials under different loads,refortified oils provided excellent lubrication performances,much better than those of fresh *** of additives replenished,the different lubrication films could form on the worn surfaces.A rough financial calculation revealed that the refortification process could produce the most economic value among the three methods.

关键词： lubricating oil refortification process lubrication performance economic evaluation physical and chemical property

Motor oil degradation during urban cycle road tests

在线全文

学校读者我要写书评

暂无评论

Friction 2021年第5期9卷 1002-1011页

作者： Lei WEI haitao duan Yongliang JIN Dan JIA Bingxue CHENG Jianfang LIU Jian LI State Key Laboratory of Special Surface Protection Materials and Application Technology Wuhan Research Institute of Materials ProtectionWuhan 430030China College of Mechanical Engineering Hunan Institute of Science and TechnologyYueyang 414006China State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China College of Biological and Pharmaceutical Engineering Wuhan Polytechnic UniversityWuhan 430023China

Several civilian vehicles in China operate in urban traffic conditions and have their motor oil changed every 5,000 *** study investigates the variations in oil properties after servicing at 5,000 km,based on systematic road tests(including a repeated test,a parallel test,and a new vehicle test).The physicochemical properties,changes in components,oxidation stability,detergent‐dispersant performance,and tribological properties of motor oils were *** results showed that the total acid number(TAN)of oils increased with the operation mileage,by up to 1.41 mgKOH/*** total base number(TBN)decreased after the road tests were completed,and the decrease was less than 44.6%.The kinematic viscosity(KV)of most oils decreased initially and then stabilized in the middle stage,before starting to increase later in the *** change in KV at 100℃was less than 15.96%.The oxidation onset temperature(OOT)of the oils diminished gradually with the operation *** OOT values of the used oils were higher than 210℃.A spot test indicated that the used oils retained their detergentdispersant performance to an appropriate *** four‐ball wear scar diameters and friction coefficient of the used oils did not increase significantly after the road tests were *** study can serve as a reference for end‐users when changing motor oils.

关键词： motor oil urban vehicles oil degradation road test oil analysis

Motor oil condition evaluation based on on-board diagnostic system

在线全文

学校读者我要写书评

暂无评论

Friction 2020年第1期8卷 95-106页

作者： Lei WEI haitao duan Dan JIA Yongliang JIN Song CHEN Lian LIU Jianfang LIU Xianming SUN Jian LI State Key Laboratory of Special Surface Protection Materials and Application Technology Wuhan Research Institute of Materials ProtectionWuhan 430030China College of Biological and Pharmaceutical Engineering Wuhan Polytechnic UniversityWuhan 430023China School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430073China

The condition of the motor oil in civilian cars is difficult to monitor;hence,we propose a method to evaluate the degree of degradation of motor oil using an on‐board diagnostic(OBD)*** civilian cars and four motor oils(containing mineral oils and synthetic oils)were subjected to five groups of road tests under urban traffic and high‐way *** operation information,oil service time,mileage,engine operation time,idle time of the engine,and number of start‐ups of the engine were obtained using the proposed OBD *** properties and changes in the components of motor oils during road tests were analyzed in *** theoretical model of the comprehensive indicators of driving parameters and oil properties were *** proposed method was successfully applied to different cars,motor oils,and operating conditions in road *** the theoretical models had high accuracy and ***,we provide a method to monitor the oil condition with real‐time driving parameters and provide a reference for end users to change their motor oil reasonably.

关键词： motor oil oil condition evaluation on‐board diagnostic system