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corresponds to the nanocomposite Ti-63%B-N (mole fraction) coating consisting of the HCP-TiB2 nano-crystallites and amorphous BN phase. The lowest friction-coefficient was observed... coating; hardness; friction coefficient 1 Introduction Transitional metal (TM, such as Ti, Cr, and Mo) nitride coatings have been extensively studied due to their superior properties, such as high......
Xiao-feng, HUANG Lei, LU Yang, YAN Jiu-chun(State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China)Abstract:To reduce the friction coefficient... multilayers is between that of the TiAlSiN and WS2 coatings. Tribological tests prove that the friction coefficient of the TiAlSiN/WS2 multilayers is lower and more stable than that of the TiAlSiN......
materials were discussed. The results show that doping rare earths in friction materials can stabilize friction coefficient, lower the wear rate of materials and increase the impact strength...Effects of Rare Earths on Properties and Microstructure of Automotive Friction Materials许越,卢立国,白婧摘 要:Rare earth compounds as modifiers used widely......
Effect of Rare Earths on Diffusion Coefficient and Transfer Coefficient of Carbon during Carburizing 刘志儒1,阎牧夫1 (1.School of Materials Science and Engineering, Harbin Institute of Technology,) Abstract:The diffusion coefficient of carbon in surface layer of steel-20 rare earth carburized at 880 ℃ and 900 ℃ for 8 h was calculated by substituting the measured layer depths into the diffusion......
content of 2.5% at which a hardness peak was attained. Regardless of the applied normal load, the lowest coefficient of friction and wear loss were attained for Cu/2.5MoS2 composite. While coefficient...; microstructure; coefficient of friction; wear mechanism 1 Introduction Lubricants are widely applied between contacting surfaces to minimize friction and wear. While liquid lubricants are typically used......
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by a UMT-2 microtribometer with and without water as lubricant, and then compared with that of bare silicon surface. Dry friction measurement results show that OTS SAMs have a very low friction coefficient..., OTS SAMs can prevent wear obviously and meanwhile present low coefficient of friction even under high velocities. The improved frictional and anti-wear property on OTS SAMs surface is attributed......
. The dependence of penetration depth and friction coefficient on the velocity was simulated and validated. It can be concluded that this system can be used for predicting the wet grip potential of asphalt pavements. Key words: wet grip; rubber tyre rim; penetration depth; friction coefficient; dynamic model 1 Introduction Skid resistance is an essential component of traffic safety......
the influence of the pre-existing fractures geometry, the injected water pressure, the stress anisotropy coefficient and the rock internal friction angle on hydraulic fracture mechanism. The overall outline... during the hydraulic fracturing process. This fracture criterion considers the effect of fracture inclination angle, the internal friction angle and the loading conditions on the distribution of stress......
擦因数. 图7 不同摩擦粉含量试样在第一次衰退程序摩擦因数的变化曲线 Fig. 7 Friction coefficient of samples with different cashew dust contents in Fade 1 添加10%摩擦粉的试样A4在执行SAE J2522标准试验后其摩擦面的SEM像和能谱分析分别如图8和表3所示.由图8和表3可见,Fe元.... The results of bench test using SAE J2521 and SAE J2522 test procedure show that the use of cashew dust makes stability of friction coefficient become more stable or friction coefficient become higher......
