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that the transition load is found for a constant sliding velocity. When the loads are higher than the transition load, the wear rate increases sharply. The composites exhibit superior wear resistance...: magnesium matrix composite; whisker; wear mechanism; wear rate 金属基复合材料的耐磨性在磨粒磨损和有润滑的情况下优于基体[1?7].SHARMA等[1]指出,AZ91镁合金中引入长石颗粒可以明显改善其耐磨性能.LIM 等[2]研究发现加入Al2O3颗粒能使合金的耐磨性最高提高1.8倍.上述报道在增强相体积分数较低的情况下,增强体......
Effect of Cooling Rate after hot Deformation on Structure and Mechanical Properties of Low Alloy Wear Resistance Cast iron Liu Jianping1,Li Lixia2 (1.College of Environmental & Chemical Engineering... of cooling rate after 40% hot deformation on structure and mechanical properties of low alloy wear resistance cast iron was investigated by metallographic, scanning electron microscopes and detection......
to another depending on the wear conditions. In the mild wear region, the wear rate of MZA is 10-6mm3/m, and the wear mechanism of MZA is plastic deformation accompanied by a little micro-cracking. In the severe wear region, the wear rate of MZA is 10-5mm3/m and the dominant wear mechanism in this region is brittle fracture. Key words: mullite/ZrO2/Al2O3; friction and wear; ceramics; wear mechanism CLC......
and melt undercooling on wear rate of the sample were investigated. The worn surface of Ni-31.44%Pb was examined using scanning electron microscope (SEM) and X-ray photoelectron spectroscope (XPS... for the lower and larger undercooling, and plastic deformation and fracture for the medium undercooling. Key words: Ni-Pb monotectic alloy; high undercooling; wear rate; wear mechanism CLC number: TG115.5......
speed, normal load, friction coefficient and wear rate can intuitively show the type and severity of friction or wear for a wide range of operating conditions. They can be used as design guidelines.... The wear rate was calculated by an equation of w=△m/ρL, where w is the wear rate (mm3/mm), △m is the wear mass loss (g), ρ is the density of the specimen (g/cm3) and L is the total sliding distance (m......
%(mass fraction) carbon nanotube causes the increase in the Vickers hardness of about 80%. Within the range of carbon nanotubes content from 1.0% to 2.0%, both the friction coefficient and wear rate... rate to evaluate wear resistance of the composites, and the average of the three replicates was cited as a result for each specimen in this article. All the friction and wear tests were performed......
Fabrication and wear properties of co-deposited Ni-Cr nanocomposite coatings ZHOU Yue-bo(周月波), ZHAO Guo-gang(赵国刚), ZHANG Hai-jun(张海军) College of Materials Science and Engineering, Heilongjiang... microscopy and microhardness test. The friction and wear performances of Ni-Cr nanocomposite coatings and pure Ni film were comparatively investigated, with the effect of the Cr content......
on the linear rate of the wear could be obtained by the regression method. A calculation model, which considers the factors of the structure of the drum, coiling tension and coiling strip... to the work performance of the mechanical parts, namely the combination of wear loss. Then the relationship among combination wear loss, wear rate and wear time can be built [6]. Surface wear is usually......
of the friction surface and the phase of worn piece in order to reveal the wear mechanism of rare-earth/MoSi2 composite. Results show that the relationships of friction coefficient, μ, or wear rate, W, of MoSi2... and rare-earth/MoSi2 composite have excellent wear resistance. When load is in the range of 80~120 N, the wear rate of RE/MoSi2 composite is lower than that of MoSi2 material by about 65%. The main......
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