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Effect of Replacing Vanadium by Niobium and Iron on the tribological behavior of HIPed Titanium Alloys

Acta Metallurgica Sinica(English Letters) 2017年第11期30卷 1089-1099页

作者： Mamoun Fellah Linda Aissani Mohammed Abdul Samad Alain Iosts Touhami Mohamed Zine Alex Montagnes Corinne Nouveau Mechanical Engineering Department ABBES Laghrour University P.O. 1252 40004 Khenchela Algeria Tribology Materials Surface and Interfaces GroupLaboratory of Foundry BADJI Mokhtar University BO 12CP 23000 Annaba Algeria Physics Department ABBES Laghrour University P.O.1252 40004 Khenchela Algeria Mechanical Engineering Department KFUPM Box 1180Dhahran 31261 Kingdom of Saudi Arabia Laboratory of Mechanics Surfaces and Processing Materials ARTS ET METIERS ParisTech Boulevard Louis XIV 859046 Lille Cedex France La.Bo.Ma.P ENSAM Rue Porte de Paris 71250 ClunyFrance

This study aims to examine the effect of replacing vanadium by niobium and iron on the tribological behavior of hot-isostatic-pressed titanium alloy （Ti-6Al-4V） biomaterial, using a ball-on-disk-type oscillating tribometer, under wet conditions using physiological solution in accordance with the ISO7148 standards. The tests were carried out under a normal load of 6 N, with an AISI 52100 grade steel ball as a counter face. The morphological changes and structural evolution of the nanoparticle powders using different milling times （2, 6, 12 and 18 h） were studied. The morphological characterization indicated that the particle and crystallite size continuously decrease with increasing milling time to reach the lowest value of 4 nm at 18-h milling. The friction coefficient and wear rate were lower in the samples milled at 18 h （0.226, 0.297 and 0.423; and 0.66 × 10-2, 0.87 × 10-2 and 1.51 × 10-2 μm3 N-1 i, tm-1） for Ti-6Al-4Fe, Ti-6A1-7Nb and Ti-6Al-4V, respectively. This improvement in friction and wear resistance is attributed to the grain refinement at 18-h milling. The Ti-6Al-4Fe samples showed good tribological performance for all milling times.

关键词： tribological behavior Titanium alloys Wear testing Nanotribology Milling time Hot isostatic pressing(HIPing)

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Characterization and tribological behavior of Octadecene,Dodecene and Undecenoic Acid Films on Si Substrate

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Journal of Materials Science & Technology 2005年第5期21卷 671-674页

作者： Jinfang ZHOU+ and Shengrong YANGState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou730000, China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

The films of octadecene, dodecene, and undecenoic acid were prepared on H-terminated Si surface in the presence of ultraviolet irradiation. The resulted films were characterized with water-contact angle measurement and infrared spectroscopy. The friction-reducing behavior of the prepared films was examined on a static-dynamic friction coefficient measurement apparatus and on an atomic force microscope. It was found that all the reacted films on the Si substrate showed good friction-reducing ability; especially, the film of the octadecene exhibited the best friction-reducing ability. This was attributed to the transfer of the reacted films onto the counter face with formation of a transfer film on the counterpart surface, which led to the transformation of the sliding between the reacted films and the hard ceramic to fiat between the reacted films and its transfer film on the counterpart surface. The macroscopic and microscopic friction behaviors of the prepared films were dependent on their molecular chain lengths. Thus the octadecene reacted film with the highest degree of ordering arrangement showed the best friction-reducing and antiwear abilities in sliding against Si3N4.

关键词： Alkese Reaction film Hydrogen-terminated silicon tribological behavior

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Advances in studies of the tribological behavior of molecular deposition films

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Petroleum Science 2008年第4期5卷 379-387页

作者： Xiao Yuqi Zhang Siwei Wang Deguo Gao Manglai School of Mechanical and Electronic Engineering China University of Petroleum Beijing 102249 China School of Chemical Science and Engineering China University of Petroleum Beijing 102249 China

An overview of the advances in studies on tribology of molecular deposition （MD） films is presented here to summarize the studies of nanofrictional properties, adhesion, wear and mechanical behavior, as well as the molecular dynamics simulation of nanotribological properties of the film in the last decade. Some key research topics which need to be investigate further are addressed.

关键词： Molecular deposition (MD) film tribological behavior adhesive property wear characteristics mechanical behavior

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Study on tribological behavior of Ni/MoS2 Composite Brush Plating Layer

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Progress in Natural Science:Materials International 1993年第1期3卷 69-77页

作者：张贤华刘家骏朱宝亮张绪寿刘洪 Beijing 100084 Lanzhou 30000 Lanzhou 730000.PRC Lanzhou Institute of Chemical Physics Academia Sinica Solid Lubrication Laboratory Tribology Research Institute Tsinghua University

Based on the good solid lubrication behavior of MoS2and technological characteristics ofbrush plating,a new type Ni/MoS2composite brush plating layer was developed and *** friction andwear properties were measured systematically on a“ball-on-disc”testing machine under both lubricatedand dry *** results show that its properties are related closely with the content ofMoS2in the plating layer and working conditions,such as load and sliding *** optimum frictioncoefficient and wear-resistance can be obtained at an appropriate content of *** order to clarifythe reasons of an excellent solid lubrication property of this composite plating layer,deep analyses of itsmicrostructure by TEM and X-ray diffraction were conducted,and the preferred orientation of MoS2withits basal planes parallel to the surface of material has been revealed.

关键词： brush plating solid lubrication tribological behavior composite plating layer

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tribological behavior of Lanthanum Phosphate and Zinc Dialkyldithiophosphate and Their Mixture as Additives in Lithium Grease

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Journal of Rare Earths 2002年第5期 491-491页

作者： Zhang Pingyu, Gong Qingye (State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China)

Lanthanum phosphate was synthesized. The tribological behavior of lanthanum phosphate (LaPO 4), zinc dialkyldithiophosphate (ZDDP) and their mixture as additives in lithium grease was evaluated with a four ball machine. The morphologies and the chemical states of some typical elements of the worn steel surfaces were analyzed by means of scanning electron microscopy (SEM) and X ray photoelectron spectroscopy (XPS). It is found that both lanthanum phosphate and zinc dialkyldithiophosphate increase the load carrying capacity of lithium grease. Lanthanum phosphate as additive in lithium grease is effective in improving the antiwear performance, while zinc dialkyldithiophosphate shows unsteady performance on improving the antiwear and friction reducing ability of the lithium grease. Lithium grease containing the above mentioned additives experienced chemical adsorption or chemical reactions on the rubbing surface, with the formation of the boundary lubrication film thereon, and hence to improve the tribological behavior of the lithium grease.

关键词： rare earths lanthanum phosphate zinc dialkyldithiophosphate additive tribological behavior

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Surface morphology and tribological behavior of AZ31 magnesium alloys irradiated by high-intensity pulsed ion beam

Surface morphology and tribological behavior of AZ31 magnesi...

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Fifth International Conference on Surface Engineering

作者： P.Li X.G.Han C.Liu X.P.Zhu M.K.Lei Surface Engineering Laboratory School of Materials Science and Engineering Dalian University of Technology Dalian 116024 China

Surface morphology and tribological behavior of AZ31 magnesium alloys irradiated by high-intensity pulsed ion beam（HIPIB） at an ion current density of 50 A/cm2 with shot number from 1 to 10 have been investigated by using scanning electron microscope（SEM）,profilometer and a ball-on-flat *** is found that the surface morphology of irradiated sample is characteristics of cratering in local region due to a selective ablation and disturbance of the molten *** roughness increased with increasing the shot number,from an initial value of 0.11 μm to a maximal value of 0.50 μm with 10 *** wear test indicated that wear volume of sample irradiated with 10 shots was approximately reduced by 50 % compared with that of unirradiated *** improved abrasive wear resistance is due to the enhanced load-bearing capacity resulted from the increase in *** refinement,precipitation of β phase caused by surface remelting and rapid cooling,and the increase in dislocation density by shock waves for AZ31 magnesium alloys under HIPIB irradiation are responsible for the improved microhardness and tribological properties.

关键词： High-intensity pulsed ion beam AZ31 magnesium alloys Surface morphology tribological behavior Microhardness

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Stable graphene oxide-based lyotropic liquid crystals for interfacial lubrication

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Friction 2024年第5期12卷 954-967页

作者： Yumei GUO Hanglin LI Jiusheng LI Xiangqiong ZENG Laboratory for Advanced Lubricating Materials Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China University of Chinese Academy of Sciences Beijing100049China

Lyotropic liquid crystals have lubricating properties due to their ordered assembly and fluidity,whose mesogens are often characterized by amphiphilic *** the attention that graphene oxide(GO)has been studied as a novel amphiphilic lyotropic mesogen this decade,and GO applied as a lubrication additive has been demonstrated in both oil and water-based systems,little research reveals the interfacial lubrication of GO liquid crystals *** work reports that GO aqueous dispersion can form lyotropic liquid crystals above a specific critical concentration of 5.00 mg/mL,providing a form of stable water-based lubricant,which can keep stable for several months and can reduce friction by 37.3%and wear by 25.24%.The liquid crystal phase was verified by polarizing microscope and synchrotron radiation small-angle X-ray scattering,and its rheological properties and viscoelasticity were studied by interfacial *** formation of lyotropic liquid crystals can enhance the stability of GO aqueous dispersions at high density,simultaneously ensuring friction decrease and anti-wear *** is attributed to the stable nematic network by the ordered GO *** ordered assembly structure bears vertical shear force,therefore,reducing the *** is also assumed that the wide lateral size of graphene oxide promotes the nematic phase thus smoothes the graphene oxide film composed spontaneously under the coincidence of lamellar liquid crystal and 2D layered *** this work,the interlayer lubrication of GO was optimized,and the problem of GO dispersion sedimentation was solved by *** range of interfacial lubrication of GO aqueous dispersion has been expanded and the synergistic effect is conducive to the environmentally friendly lubricants.

关键词： lyotropic liquid crystal graphene oxide aqueous lubrication tribological behavior

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High-temperature tribological behaviors of a Cr-Si co-alloyed layer on TA15 alloy

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Chinese Journal of Aeronautics 2017年第2期30卷 846-855页

作者： Lu Haifeng Miao Qiang Liang Wenping Wang Fang Ding Zheng Xia Jinjiao College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

A Cr-Si co-alloyed layer was successfully deposited on TA15 alloy by the double glow plasma surface technology to improve its poor wear resistance at elevated *** microstructure,composition,and phase structure of the layer were investigated by SEM,EDS,and *** tribological behaviors of the Cr-Si co-alloyed layer at 20 ℃ and 500 ℃ were analyzed in *** results indicated that the friction coefficient and wear rate of the Cr-Si coalloyed layer at 20 ℃ and 500 ℃ were much lower than those of the substrate,which was due to higher hardness and superior elastic *** layer may become an approach to effectively improving the wear resistance of TA15 alloy at elevated temperature.

关键词： Cr-Si layer High temperature TA 15 alloy tribological behavior Wear mechanism

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Fabrication, mechanical properties, and tribological behaviors of Ti2AlC and Ti2AlSn0.2C solid solutions

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Journal of Advanced Ceramics 2017年第2期6卷 90-99页

作者： Leping CAI Zhenying HUANG Wenqiang HU Suming HAO Hongxiang ZHAI Yang ZHOU Centre of Materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong University Beijing 100044 China Centre of Materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong University Beijing 100044 ChinaKey Laboratory of Vehicle Advanced Manufacturing Measuring and Control Technology(Beijing Jiaotong University) Ministry of Education China

Highly pure and dense Ti2AlC and Ti2AlSn0.2C bulks were prepared by hot pressing with molar ratios of 1:1.1:0.9 and 1:0.9:0.2:0.85, respectively, at 1450 °C for 30 min with 28 MPa in Ar atmosphere. The phase compositions were investigated by X-ray diffraction (XRD); the surface morphology and topography of the crystal grains were also analyzed by scanning electron microscopy (SEM). The flexural strengths of Ti2AlC and Ti2AlSn0.2C have been measured as 430 and 410 MPa, respectively. Both Vickers hardness decreased slowly as the load increased. The tribological behavior was investigated by dry sliding a low-carbon steel under normal load of 20–80 N and sliding speed of 10–30 m/s. Ti2AlC bulk has a friction coefficient of 0.3–0.45 and a wear rate of (1.64–2.97)×10−6 mm3/(N·m), while Ti2AlSn0.2C bulk has a friction coefficient of 0.25–0.35 and a wear rate of (2.5–4.31)×10−6 mm3/(N·m). The influences of Sn incorporation on the microstructure and properties of Ti2AlC have also been discussed.

关键词： Ti 2 AlC Ti 2 AlSn 0.2 C microstructure mechanical property tribological behavior

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Microstructure and Properties of WB_(2)/Cr Multilayer Films with Different Bilayer Numbers Deposited by Magnetron Sputtering

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Acta Metallurgica Sinica(English Letters) 2022年第4期35卷 693-702页

作者： W.B.Shi Y.M.Liu W.H.Li T.Li H.Lei J.Gong C.Sun Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China College of Materials Science and Engineering Xi'an Shiyou UniversityXi'an 710065China

The influence of the bilayer number on the microstructure,mechanical properties,adhesion strength and tribological behaviors of the WB_(2)/Cr multilayer films was systematically investigated in the present *** groups of WB_(2)/Cr films with the same modulation ratio were synthesized by magnetron sputtering *** crystalline structure of the films was determined by X-ray *** morphologies and the microstructure of the films were observed by scanning electron microscopy,atomic force microscopy and transmission electron ***,Nano indenter,scratch tester and ball-on-disc tribometer were used to evaluate the mechanical and tribological *** bilayer numbers varied from 5 to 40,the hardness increased first and then decreased with the maximum hardness of 33.9 GPa when the bilayer number is *** H/E^(*)and H^(3)/E^(*2)values calculated to evaluate the fracture toughness showed the similar changing trend with *** adhesion strength reached the maximum of 67 N when the bilayer number is *** surface roughness and friction coefficient decreased with increasing bilayer *** wear mechanism was also investigated,and the results suggested that the multilayer film with bilayer number of 30 exhibited the best wear resistance(1.78×10^(–7)mm^(3)/Nm),benefiting from the contribution of high hardness,fracture toughness and adhesion strength.

关键词： WB_(2)/Cr multilayer Magnetron sputtering Bilayer number tribological behavior

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