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Friction and Wear Behavior of Nano-ZnO Filled UHMWPE Composites
纳米氧化锌填充超高分子量聚乙烯复合材料的摩擦磨损性能研究

LEI Yi,GUO Jian-liang,ZHANG Yan-xiang,
雷毅
,郭建良,张雁翔

摩擦学学报 , 2006,
Abstract: Ultra high molecular weight polyethylene(UHMWPE) based composites filled with nanometer ZnO wereprepared by heat compression molding.The influence of nano-particulates on the friction and wear behavior of thecomposites were investigated on a pin-on-disc test rig.The worn surfaces of the composites were observed on ascanning electron microscope.Itwas found thatthe friction and wear properties of the composites filled with15% ~20%nano-ZnO were improved remarkably.Wear mechanisms of the composites varied with the amount of nano-par-ticulates.The wear mechanisms of pure UHMWPE were adhesive wear and fatigue wear.Characteristics of fatiguewear disappeared gradually with the increase of mass fraction of nano-ZnO.When the fraction exceeds 15%,mainwear mechanism was adhesive wear.There were two zones on the wear surfaces,one was lack of ZnO,the otherwas abundant in ZnO,and the latter distributed in the zone lack of ZnO in the form of islands.
Study on the Friction and Wear Properties of Glass Cloth Composites Filled with Various Nano- and Micro-Particles
纳米及微米颗粒改性玻璃纤维织物复合材料的摩擦磨损性能研究

SU Feng-hu,ZHANG Zhao-zhu,JIANG Wei,WANG Kun of Chemical Physics,Chinese Academy of Sciences,Lanzhou,China,
苏峰华
,张招柱,姜葳,王坤

摩擦学学报 , 2004,
Abstract: The glass cloth composites filled with irradiated polytetrafluoroethylene (PTFE), MoS_2, nano-TiO_2, and nano-CaCO_3 were prepared by immersing of the glass cloth in an adhesive doped with various micro- and nano-fillers, plastering of the immersed glass cloth onto the steel substrate, and curing of the plastered glass cloth at proper temperature. The friction and wear properties of the resulting glass cloth composites sliding against AISI-1045 steel in a pin-on-disc configuration and under unlubricated condition were investigated. The worn surface morphologies of the glass cloth composites and the counterpart steel were observed on a scanning electron microscope. It was found that the friction-reducing and anti-wear properties of the glass cloth composites were greatly improved by filling with irradiated PTFE and nano-TiO_2, and the irradiated PTFE was superior to nano-TiO_2 in terms of the ability to improve the friction-reducing and anti-wear properties of the glass cloth. The glass cloth composite filled with 10% PTFE showed the best friction-reducing and anti-wear properties. However, MoS_2, and nano-CaCO_3 as the fillers were harmful to the friction and wear properties of the glass cloth composites. This was related to the different compatibility and interfacial bonding among different fillers and the adhesive and glass cloth matrix, and to the different natures of the transfer films of the glass cloth composites filled with various fillers on the counterpart steel surface as well.
Tribological Behavior of Nano-TiO2 and Nano-SiO2 Filled Nylon Composites
纳米TiO2和SiO2填充尼龙的摩擦磨损行为

GE Shi-rong,WANG Qing-liang,LI Ling,HUANG Xiao-long,
葛世荣
,王庆良,李凌,黄孝龙

摩擦学学报 , 2004,
Abstract: PA1010-based composites filled with nano-SiO_2 and nano-TiO_2 particles were prepared by extrusion molding. The friction and wear behaviors of the resulting nylon composites sliding against AISI-1045 steel under dry ambient condition were evaluated on an MM-200 friction and wear tester. The tensile strength of the filled nylon composites was determined on an electronic tensile strength meter, and the hardness of the composites was measured on an HRM scale. The worn surface morphologies and microdtructures of the filled nylon composites observed on a scanning electron microscope and transmittance electron microscope, respectively. It was found that the incorporation of the nano particulates contributed to reducing the friction coefficient to some extent and decreasing the wear mass loss considerably. Nano-SiO_2 was superior to nano-TiO_2 in terms of the ability to increase the wear-resistance of the nylon1010 matrix, which was related to the differences in the microstructures of the two kinds of filled nylon composites. The nano-particle filled nylon composites were dominated by mild adhesion and fatigue wear as they slid against the steel counterpart in dry ambient condition. It was suggested to control the mass fraction of the nano-fillers as 10% so as to obtain the optimized wear-resistance of the filled nylon composite.
Dry Friction and Wear Properties of PTFE Composite Filled with Carbon Nano Tubes
碳纳米管改性聚四氟乙烯复合材料的摩擦磨损性能研究

QU Jian-jun,LI Xian-ling,SONG Bao-yu,
曲建俊
,李显凌,宋宝玉

摩擦学学报 , 2005,
Abstract: Effects of carbon nano tubes(CNTs) on friction and wear properties of polytetrafluoroethylene (PTFE) wear investigated using an MM-200 wear tester. Mechanical performances of PTFE composites were measured. Experimental results showed that CNTs could reduce wear and increase friction coefficient of PTFE. Furthermore, it could also increase hardness and impact intensity of PTFE. When content of CNTs is 7% in weight, mechanics performance of PTFE composite is optimal and when content is 10% in weight, the wear performance of PTFE composite is optimal. Worn surfaces of CNTs-filled PTFE composites and the shapes of the transfer film and worn debris were observed using a scanning electron microscope and an optical microscope. The reasons the wear of PTFE is decreased are probably that fibers in CNTs resisted severe mangle of PTFE strip structure, and that films transferred from counterpart surface prevented direct contact between PTFE composite and steel ring.
Friction and Wear Properties of PA6 Composites Filled with Nanocrystalline Al2O3
纳米Al2O3增强PA6复合材料的摩擦磨损性能研究

ZHONG Ming-qiang~,SUN Li~,GUO Shao-yi~,
钟明强
,孙莉,郭绍义

摩擦学学报 , 2004,
Abstract: The composites of PA6 filled with Al_2O_3 nanoparticles were prepared by extrusion of the mixed polymeric matrix and the nano particulates on a twin-screw rod machine and injection molding of the extruded granules. The friction and wear properties of the resulting polyamide-6 composites with different contents of nanocrystalline Al_2O_3 sliding against 45~# steel in dry ambient conditions were evaluated on an MMW-1 friction and wear tester. The worn surfaces of the composites were observed on a scanning electron microscope. It was found that the incorporation of the Al_2O_3 nanoparticles in PA6 contributed to greatly reducing the wear mass loss of PA6. The PA6 composite containing 10% Al_2O_3 nanoparticles showed the best friction-reducing and antiwear behavior, which was related to the stronger interfacial bonding between the nano-filler and the polymeric matrix in this case. Moreover, the differences in the tribological behaviors of the composites with different compositions were closely related to the differences in the corresponding worn surface morphologies. It was imperative to keep a relatively lower filler content in the filled PA6 composite so as to get rid of the severe scratch to the counterpart steel surface.
Wet Friction and Wear Behavior of Graphite-Filled Carbon Fabric Composites
石墨改性碳布复合材料湿式摩擦磨损性能研究

PAN Guang-zhen,QI Le-hu,FU Ye-wei,FEI Jie,ZHANG Xiang,
潘广镇
,齐乐华,付业伟,费杰,张翔

摩擦学学报 , 2012,
Abstract: Five carbon fabric composites filled with graphite particulates (0%~20%) are fabricated by impregnation. The tribological properties of the carbon fabric composites are investigated on a wet friction tester and the surface morphologies are analyzed using a scanning electron microscope. Experimental results show that the addition of graphite has pronounced effect on the dynamic friction torque but much less effect on the lock-up static friction torque. With addition of graphite, the dynamic friction coefficient is significantly reduced and its stability is improved. The presence of graphite decreases the wear rates of the composites and the counterpart material. Carbon fabric composite containing 15% graphite has the lowest wear rate. The stability coefficient is introduced for quantitative analysis of dynamic friction coefficient. By quantitative analysis, the carbon fabric composites with 10% graphite exhibits the best stability of dynamic friction coefficient.
Friction and Wear Behavior of Nanometer Si_3N_4-filled Bismaleimide Composites
纳米Si_3N_4填充聚双马来酰亚胺摩擦磨损性能研究

YAN Hong xi,NING Rong chang,MA Xiao yan,ZHANG Qiu yu,
颜红侠
,宁荣昌,马晓燕,张秋禹

摩擦学学报 , 2001,
Abstract: Composites of bismaleimide filled with nanometer Si 3N 4 were made by casting method. The friction and wear behavior of the composites sliding against AISI 1045 steel was investigated on an MM 200 friction and wear tester. The morphologies of the composite were observed with a transmission electron microscope, while those of the worn composite surfaces and wear debris observed with a scanning electron microscope. As the results, nanometer Si 3N 4 as a filler considerably improves the friction and wear behavior of the resin. The wear rate of the filled composites decreases with the increase of the mass fraction of the filler and comes to the lowest at a filler mass fraction 1.5%. Then the wear rate of the composite rises with further increase of the filler mass fraction but is still greatly lower than that of the resin matrix. Flake like wear debris of the resin matrix was generated in its sliding against the steel; while tiny particulate wear debris of the composites was generated in their sliding against the steel. This may account for the different friction and wear behaviors of the resin matrix and the filled composites. Naturally, the different friction and wear behaviors of the resin matrix and the filled composites should also be dependent on their different mechanical properties. Further work is needed in this respect.
Tribological Behavior of Inorganic Nano-Particulates and Polytetrafluoroethylene Filled Polyetheretherketone Composites
无机纳米微粒及聚四氟乙烯填充聚醚醚酮复合材料的摩擦学性能

PENG Xu-dong,MA Hong-yu,ZENG Qun-feng,LEI Yi,
彭旭寿
,马红玉,曾群峰,雷毅

摩擦学学报 , 2004,
Abstract: The polyetheretherketone (PEEK) based composites filled with nanometer Al_2O_3 or nanometer TiO_2 and polytetrafluoroethylene (PTFE) were prepared by heat compression molding. The influence of the inorganic nano-particulates on the tribological behavior of the composites was investigated on a pin-on-disc test rig, by dry sliding against AISI 1020 carbon steel disc in a pin-on-disc configuration. The worn surfaces of the composites were observed on a scanning electron microscope. It was found that the PEEK composites filled with the nano-particulates of a proper mass fraction and with 10%PTFE recorded smaller friction coefficients and wear rates than the PEEK-based composite filled with 10%PTFE alone. The nanometer TiO_2 as the filler was superior to the nanometer Al_2O_3 in terms of the ability to improve the friction and wear behavior of the PEEK-based composites. This was attributed to the enhanced plastic deformation of the PEEK-based composites in the presence of the Al_2O_3 nano-particulates, which was not observed for the PEEK/10%PTFE/5%nano-TiO_2 and PEEK/10%PTFE/7%nano-TiO_2 composites. It was suggested to pursue further work so as to reach a better understand of the differences in the tribological behaviors and wear mechanisms incorporated with PTFE and different types of inorganic nano-particulates.
Friction and Wear Properties of Nanocrystalline Al_2O_3 Filled PTFE Composites
纳米Al2O3填充聚四氟乙烯摩擦磨损性能的研究

HE Chun xi,SHI Li ping,SHEN Hui ping,
何春霞
,沈惠平

摩擦学学报 , 2000,
Abstract: The friction and wear properties of polytetrafluoroethylene (PTFE) composites filled with nanocrystalline Al 2O 3 were evaluated with an MM 200 friction and wear tester. The worn surfaces of PTFE composites were examined by means of scanning electron microscopy (SEM). It has been found that the incorporation of nanocrystalline Al 2O 3 into PTFE increases the wear resistance of PTFE but worsens the friction reduction performance to some extent. The friction coefficient of PTFE composites increases with the increasing of Al 2O 3 content. The best wear resistance of the composite is reached at a mass fraction of Al 2O 3 about 10%. Moreover, nanocrystalline Al 2O 3 as the filler in PTFE leads to enhanced plastic deformation of PTFE matrix in the composite, which subsequently increases the friction coefficient.
Study on the Friction and Wear Properties of Polyimide Composites Filled with Polytetrafluoroethylene and MoS2
聚四氟乙烯和二硫化钼填充聚酰亚胺复合材料的摩擦磨损性能研究

ZHU Min,ZHANG Zhao-zhu,WANG Kun,JIANG Wei of Chemical Physics,Chinese Academy of Sciences,Lanzhou,China,
朱敏
,张招柱,王坤,姜葳

摩擦学学报 , 2004,
Abstract: The friction and wear properties of the polyimide (PI) composites filled with polytetra-fluoroethylene (PTFE) and molybdenum disulfide (MoS_2) particulates sliding against GCr15 steel under dry friction condition were studied using an MM-200 ring-on-block friction and wear tester. The worn surfaces of the PI composite blocks and the counterpart steel rings were observed using a scanning electron microscope and energy dispersive spectroscope. It was found that PTFE and MoS_2 as the fillers contributed to improve the friction and wear behavior of PI. Namely, all the filled PI composites except for PI+10%PTFE+20%MoS_2 showed much better wear-resistance than the unfilled PI, for example, the PI+20%PTFE+10%MoS_2 composite registered a wear rate smaller than that of the unfilled PI by 1 order of magnitude, and the filled PI composites had smaller friction coefficients than the unfilled PI as well. Moreover, the PI+30%MoS_2 composite showed the best friction-reducing and antiwear behavior among all the composites tested, which indicated that the inorganic and organic complex fillers did not necessarily have synergistic effect in terms of their ability to improve the friction and wear behavior of PI. The improved friction and wear behaviors of the filled PI composites were closely related to the characteristics of their transfer films formed on the counterpart steel surface. The composites capable of forming the transfer film with proper thickness and even distribution had better friction and wear behaviors.
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