Tribological properties of plasma-sprayed Cr3C2-NiCr coatings without or with electroless plated Ni were investigated, and the worn surfaces were analyzed by employing SEM, XRD and XPS. It was found that both the self-mated rubbing pairs consisting of the Cr3C2-NiCr coating and the Cr3C2-NiCr coating electroless plated with Ni displayed higher friction coefficient and wear coefficient.
The Ni based self lubricating alloys with various proportions of LaF 3 as lubricant were prepared by hot pressing the mixture powder of alloyed Ni Cr powder, elemental Mo, Al, Ti, B, and MoS 2 powder and LaF 3 powder. The mechanical properties and tribological properties of these alloys rubbing with Al 2O 3 ceramics were measured at elevated temperature.
用粉末冶金热压方法制备了含不同LaF3 添加量的Ni Cr Mo Al Ti B MoS2 LaF3 系宽温度范围自润滑合金 ,测试了合金力学性能及与Al2 O3 陶瓷配副下的高温摩擦磨损性能。
When appropriate parameters are adopted, a uniform hardened case on ? 10mmx8mm rub part of valve core can be acquired with depth about 0.62mm-0.86mm and hardness about 41.3 HRC-44HRC,which meets the perform requirements.
A fourth-order variational inequality of the second kind arising in a plate frictional bending problem is considered.
Calculating frictional force with considering material microstructure and potential on contact surfaces
A method based on the energy dissipation mechanism of an Independent Oscillator model is used to calculate the frictional force and the friction coefficient of interfacial friction.
The relationships between frictional force and parameters of a tribo-system, such as surface energy and microstructure of interfacial material, are set up.
The calculation results of the known experimental data denote that the frictional force is nearly proportional to the surface energy of the material, nearly inversely proportional to the scaling length, and independent of the lattice constant.
The stage corresponding to a developed fluid layer is investigated without taking into account the plastic deformation of the rubbing bodies; it is assumed that all the heat released is expended exclusively on melting the solid.
A simple method of electrostatic rubbing is developed for the application of single-walled carbon nanotubes (SWNT) to solid substrates.
The dyes are applicable to various textiles, ensuring high colorfastness to laundering and rubbing.
Contrary to the case of rubbing orientation, the photoluminescence spectrum of the LC layer, oriented by irradiation, substantially differs from the initial one.
As the time of correlation of lubricant temperature fluctuations gets longer, the temperature of rubbing surfaces rises to the point where sliding friction sets in.
Eccentricity is one of the frequent faults of induction motors, and it may cause rub between the rotor and the stator.
Early detection of significant rub from pure eccentricity can prolong the lifespan of induction motors.
This paper is devoted to such mixed-fault diagnosis: eccentricity plus rub fault.
Experimental results show that the proposed method can effectively distinguish two types of faults, single-fault of eccentricity and mixed-fault of eccentricity plus rub.
In a palpation procedure, medical doctors push and rub the organ's surface, and are provided the sensation of distributed pressure and contact force (reflecting force) for discerning doubtable areas of the organ.