检索结果-南通市图书馆

Influence of Surface Roughness of Galvanized Steel Sheet on Self-lubricated Coating

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2014年第3期21卷 342-347页

作者： Xin LIU Wu-gang YU Qi-fu ZHANG She-ming JIANG National Engineering laboratory of advanced Coating Technology for Metal materials Central Iron and Steel Research Institute School of materials Science and Engineering University of Science and Technology Beijing

Three different thicknesses of self-lubricated coatings were prepared on galvanized steel sheets with differ- ent surface roughness （Ra）. Performances of the coatings were evaluated by various laboratory tests. Scanning elec- tron microscopy （SEM）, atomic force microscope （AFM）, neutral salt spraying test （NSST）, reciprocating friction and wear test were taken in order to characterize the coatings. Results show that the self-lubricated coating has good corrosion resistance and lubricating property. In 0. 857--1. 629 /~m of Ra value, the relationship between friction co- efficients of the self lubricated steel sheets and the surface roughness of the galvanized steel sheets likes a parabolic curve, and has a peak value of friction coefficient in certain range of Ra. Affected by the hereditary surface topogra- phy of the galvanized steel sheet, dents on the surface of sel^lubricated steel become deeper and larger with the in crease of the surface roughness of the galvanized steel sheets. The influence of the surface roughness of the galvanized steel sheet on the corrosion resistance of the self lubricated coating steel is similar to that on friction coefficient of selPlubricated coatings, like a parabolic curve.

关键词： surface roughness self-lubricated friction coefficient corrosion resistance

An overview of functional biolubricants

在线全文

学校读者我要写书评

暂无评论

Friction 2023年第1期11卷 23-47页

作者： Lumin YANG Xiaoduo ZHAO Zhengfeng MA Shuanhong MA Feng ZHOU State Key laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of materials Science and Optoelectronics Enginering University of Chinese Academy of SciencesBeijing 100049China Yantai Zhongke Research Institute of advanced materials and Green Chemical Engineering Yantai 264006China Shandong laboratory of Yantai advanced materials and Green Manufacture Yantai 264006China

At present,more and more diseases are associated with the lubrication dysfunction,which requires a systematic study of the complex lubrication behavior of tissues and organs in human *** biomacromolecular lubricants are essential for maintaining ultra-low coefficients of friction between sliding biological ***,when the surface lubrication performance of tissues or organs destroys heavily,it will bring friction/shear damage for sliding contact ***,the application of exogenous biological lubricating materials to improve the lubrication situation of damaged tissue or organ interfaces has attracted extensive attention of *** this review,based on a simple summary of lubrication mechanism at sliding biological interface,we systematically introduce the research progress of several kinds of representatively biolubrication materials,including eye drops,tissue anti-adhesion agents,joint lubricants,and medical device ***,the lubrication mechanism and individual advantage and shortcoming for each of these synthetic exogenous lubricated materials are ***,the important lubrication application functionality of these biolubricant materials in typically medical surgery scenes,such as dry eye syndrome,tissue adhesion,arthritis,and interventional medical devices,is ***,we look forward to the future development direction of artificial biolubricant materials.

关键词： biolubricants eye drops tissue anti-adhesion arthritis treatment medical devices

Design and characterization of metallic glass/graphene multilayer with excellent nanowear properties

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 2022年第11期10卷 1913-1926页

作者： Qing ZHOU Dawei LUO Dongpeng HUA Wenting YE Shuo LI Qiguang ZOU Ziqiang CHEN Haifeng WANG State Key laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Songshan Lake materials laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China

The excellent properties of metallic glass(MG)films make them perfect candidates for the use in miniature systems and ***,their high coefficients of friction(COFs)and poor wear resistance considerably limit their long-term performance in nanoscale *** report the fabrication of a MG/graphene multilayer by the repeated deposition of Cu_(50)Zr_(50) MG with alternating layers of *** microstructure of the multilayer was characterized by the transmission electron microscopy(TEM).Its mechanical and nanotribological properties were studied by nanoindentation and nanoscratch tests,respectively.A molecular dynamics(MD)simulation revealed that the addition of graphene endowed the MG with superelastic recovery,which reduced friction during *** comparison with the monolithic MG film,the multilayer exhibited improved wear resistance and a low COF in repeated nanowear tests owing to the enhanced mechanical properties and lubricating effect caused by the graphene *** work is expected to motivate the design of other novel MG films with excellent nanowear properties for engineering applications.

关键词： metallic glass(MG) multilayer nanowear properties molecular dynamics(MD)simulation

In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of advanced Ceramics 2023年第2期12卷 357-372页

作者： Zhichao WU Shuangjian LI Xiujuan FAN Florian VOGEL Jie MAO Xiaohui TU Institute of advanced Wear&Corrosion Resistant and Functional materials Jinan UniversityGuangzhou 510632China Institute of New materials Guangdong Academy of SciencesNational Engineering Laboratory of Modern Materials Surface Engineering TechnologyGuangzhou 510650China

The self-lubricating ceramic coatings that can control friction and wear have attracted researchers’widespread ***,the poor interfacial bonding between lubricants and ceramics and the deterioration of mechanical properties due to a tribological design limit their practical ***,a robust self-lubricating coating was fabricated by an in-situ synthesis of MoS_(2)/C within inherent defects of thermally sprayed yttria-stabilized zirconia(YSZ)*** edge-pinning by noncoherent endows hybrid coatings with excellent interfacial strength,increasing their hardness(HV)and cohesive ***,owing to the formation of a well-covered robust lubricating film at a frictional interface,a coefficient of friction(COF)can be reduced by 79.6%to 0.15,and a specific wear rate(W)drops from 1.36×10^(−3) to 6.27×10^(−7) mm^(3)·N^(−1)·m^(−1).Combining outstanding mechanical properties and tribological performance,the hybrid coating exhibits great application potential in controlling friction and ***,this strategy of introducing the target materials into the inherent defects of the raw materials to improve the relevant properties opens new avenues for the design and preparation of composite materials.

关键词： self-lubricating ceramic coatings thermal spray in-situ synthesis MoS_(2)/C friction and wear mechanical properties

Stable dispersibility of bentonite-type additive with gemini ionic liquid intercalation structure for oil-based drilling

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 2023年第2期11卷 201-215页

作者： Chaoyang ZHANG Rui DONG Xingang WANG Yijing LIANG Ming ZHANG Qiangliang YU Zhongping TANG Huiying LV Liping WANG Meirong CAI Feng ZHOU Weimin LIU 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 100039China PetroChina Lanzhou lubricating Oil R&D Institute Lanzhou 730060China

In this study,the direct intercalation of gemini ionic liquids(ILs)with different alkyl chains into the bentonite(BT)interlayer as a high-performance lubricating additive for base oil 500SN was *** purpose of modifying BT with an IL is to improve the dispersion stability and lubricity of BT in lubricating *** dispersibility and tribological properties of IL–BT as oil-based additives for 500SN depend on the increase in interlamellar space in BT and improve as the chain length is *** importantly,the IL–BT nanomaterial outperforms individual BT in improving wear resistance,owing to its sheet layers were deformed and sprawled in furrows along the metal surface,thereby resulting in low surface *** of its excellent lubrication performance,IL-modified BT is a potential candidate for the main component of drilling *** can be used as a lubricating additive in oil drilling and oil well construction to reduce equipment damage and ensure the normal operation of equipments.

关键词： ionic liquid modified bentonite nanomaterial oil-based additive

Mono-dispersed Ag nanoparticles decorated graphitic carbon nitride:An excellent lubricating additive as PPESK composite film

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 2022年第5期10卷 717-731页

作者： Beibei CHEN Mengjie ZHANG Kan ZHANG Zhe DONG Jiaye LI Gai ZHAO School of materials and Science Engineering Institute for Advanced MaterialsJiangsu UniversityZhenjiang 212013China State Key laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Studies show that two dimensional(2D)nanomaterial and its hybrid have a great promise in tribology for the special laminar ***,the majority of performed investigations about 2D graphitic carbon nitride(g-C_(3)N_(4))nanosheets are most focused on energy storage,catalysis,adsorption,rarely *** the present study,g-C_(3)N_(4) supporting mono-dispersed Ag nanoparticle hybrid(g-C_(3)N_(4)/Ag)is prepared,and its microstructure and chemical composition are *** specifically,the tribological performance as the lubricating additive of poly phthalazinone ether sulfone ketone(PPESK)composite is investigated using the ball-on-disc friction ***,the corresponding enhancement mechanism is well proposed based on the experimental analysis and theoretical *** results show that Ag nanoparticles with a size of about 10-20 nm are homogeneously anchored on g-C_(3)N_(4) nanosheets,favoring for good compatibility between g-C_(3)N_(4)/Ag and *** is found that when 0.3 wt%of g-C_(3)N_(4)/Ag is added to PPESK,the friction coefficient and wear rate of PPESK decrease by 68.9%and 97.1%,*** reductions are mainly attributed to the synergistic self-lubricating effect of Ag nanoparticles and g-C_(3)N_(4) nanosheet,the formation of transfer film,as well as the limited effect of g-C_(3)N_(4)/Ag on the shear deformation of PPESK composite ***,it is found that the proposed g-C_(3)N_(4)/Ag-PPESK composite still keeps reasonable friction-reducing and wear-resistant properties under heavy loads and high rotating *** present study demonstrates that the proposed g-C_(3)N_(4)/Ag hybrid is an excellent lubricating additive for polymer composites.

关键词： g-C_(3)N_(4)/Ag hybrid poly phthalazine ether sulfone ketone(PPESK)composite film friction wear theoretical simulation

Calcium ion pinned vanadium oxide cathode for high-capacity and long-life aqueous rechargeable zinc-ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2020年第12期63卷 1767-1776页

作者： Min Du Feng Zhang Xiaofei Zhang Wentao Dong Yuanhua Sang Jianjun Wang Hong Liu Shuhua Wang State Key laboratory of Crystal materials Shandong UniversityJinan 250100China Institute for advanced Interdisciplinary Research(iAIR) University of JinanJinan 250022China

Rechargeable aqueous zinc ion batteries (ZIBs),with the easy operation,cost effectiveness,and high safety,are emerging candidates for high-energy wearable/portable energy storage ***,the unsatisfactory energy density and undesired long-term cycling performance of the cathode hinder the development of ***,we report the chemical preintercalation of a small amount of calcium ions into V2O5 as the cathode *** cathode of Ca0.04V2O5·1.74H2O (CVO)was demonstrated to have a high specific capacity of 400 mA h g^-1at the current density of 0.05 A g^-1and 187 mA h g^-1at 10 A g^-1,along with impressive capacity retention (100%capacity retention at 10 A g^-1 for 3,000 cycles).Meanwhile,the CVO//Zn battery exhibits a high energy density of 308 Wh kg^-1and a power density of 467 W kg^-1at 0.5 A g^-*** superior performance originates from the pinning effect of the calcium ions and the lubricating effect of the structural *** energy storage mechanism of the CVO cathode was also investigated in *** new phase (Zn3(OH)2V2O7·2H2O) generated upon cycling participates in the electrochemical reaction and thus contributes to the excellent electrochemical *** small amount of Ca^2+ pre-inserted into the interlayer of V2O5 sheds light on constructing cathodes with high energy density for ZIBs.

关键词： aqueous zinc-ion battery ion pre-intercalation vanadium pentoxide phase transition energy storage mechanism

Well-Dispersed Graphene Enhanced Lithium Complex Grease Toward High-Efcient Lubrication

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2023年第5期36卷 341-352页

作者： Kaiyue Lin Zhuang Zhao Yuting Li Zihan Zeng Xiaofeng Wei Xiaoqiang Fan Minhao Zhu Key laboratory of advanced Technologies of materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Tribology Research Institute School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China

Graphene as a lubricating additive holds great potential for industrial lubrication. However, its poor dispersity and compatibility with base oils and grease hinder maximizing performance. Here, the infuence of graphene dispersion on the thickening efect and lubrication function is considered. A well-dispersed lubricant additive was obtained via trihexyl tetradecyl phosphonium bis(2-ethylhexyl) phosphate modifed graphene ([P_(66614)][DEHP]-G). Then lithium complex grease was prepared by saponifcation with 12-OH stearic acid, sebacic acid, and lithium hydroxide, using polyalphaolefn (PAO20) as base oil and the modifed-graphene as lubricating additive, with the original graphene as a comparison. The physicochemical properties and lubrication performance of the as-prepared greases were evaluated in detail. The results show that the as-prepared greases have high dropping point and colloidal stability. Furthermore, modifed-graphene lithium complex grease ofered the best friction reduction and anti-wear abilities, manifesting the reduction of friction coefcient and wear volume up to 18.84% and 67.34%, respectively. With base oil overfow and afux, well-dispersed [P_(66614)][DEHP]-G was readily adsorbed to the worn surfaces, resulting in the formation of a continuous and dense graphene deposition flm. The synergy of deposited graphene-flm, spilled oil, and adhesive grease greatly improves the lubrication function of grease. This research paves the way for modulating high-performance lithium complex grease to reduce the friction and wear of movable machinery.

关键词： Graphene additive Lithium complex grease Dispersion Tribological properties

Effects of Adsorption of Albumin and Gamma-Globulin on the Tribological Performance of a Diamond-Like Carbon Film

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) 2019年第5期34卷 1103-1108页

作者： WU Bingjie LENG Yongxiang Key laboratory for advanced Technologies of materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Quantum materials Research Center School of Physics and Electronic EngineeringZhengzhou Normal UniversityZhengzhou 450044China

The effects of surface adsorption of bovine serum albumin(BSA) and human gamma-globulin(HGG) on the tribological performance of a DLC film were investigated using a quartz crystal microbalance with dissipation(QCM-D), a ball-on-disk reciprocating tribometer, and a three-electrode electrochemical cell. The results showed that the wear depth in the BSA solution was higher than that in the HGG solution. In the HGG solution, the HGG-adsorbed layer could act as a lubricating layer and protect the DLC film from wear. The wear volume of DLC film in BSA and HGG mixture solution was higher than that in single HGG solution. This may be because the BSA molecules inhibit the formation of HGG adsorbed layer during sliding.

关键词： Diamond like carbon(DLC) Quartz crystal microbalance with dissipation(QCM-D) Adsorbed layer Wear