“…More voids will lead to worse mechanical properties of copper alloy material and produce greater wear under dry friction. However, under lubrication conditions, the holes can store more lubricating mediums to maintain good friction and wear properties [26]. Figure 3 The metallographic structure of test samples under a 100× light microscope.…”
Section: Resultsmentioning
confidence: 99%
“…After incorporation of both two hard particles into Material D, it is easy to form an agglomeration of particles (the area B in Figure 4(d)), which is caused by their size difference and poor wettability between each other. The agglomeration is not conducive to lubrication to a certain extent, because once the agglomerates fall off, larger wear debris will be formed, which will cause more serious damage to the wear surface [26]. Figure 4 SEM and EDX images of original surfaces of test samples.…”
Section: Resultsmentioning
confidence: 99%
“…More voids will lead to worse mechanical properties of copper alloy material and produce greater wear under dry friction. However, under lubrication conditions, the holes can store more lubricating mediums to maintain good friction and wear properties [26]. Generally speaking, grain size and mechanical properties of the material in a steady-state conform to the Hall-Pitch relationship, that is, the smaller the grain size, the stronger the mechanical properties of the metal [11].…”
The effects of molybdenum disilicide (MoSi2) and ferrophosphorus (FemPn) particles on the tribological properties of copper-tin bismuth (CuSn10Bi3) bimetallic bearing materials were studied in this paper. The samples of CuSn10Bi3 containing MoSi2 and/or FemPn were prepared by powder sintering technology and the metallographic structure of four kinds of self-lubricating copper alloy composite materials after sintering was observed. The tribological properties of the copper alloy composites under starved lubrication conditions were investigated and its worn surfaces and wear debris were discussed and analysed. The results show that the addition of MoSi2 and/or FemPn particles can effectively refine the grain size, optimise the grain boundary morphology, and improve the mechanical properties of the alloys. Under extreme working conditions, the hard particles reinforced copper-based alloy samples have better wear resistance and anti-seizure resistance. GRAPHICAL ABSTRACT
“…More voids will lead to worse mechanical properties of copper alloy material and produce greater wear under dry friction. However, under lubrication conditions, the holes can store more lubricating mediums to maintain good friction and wear properties [26]. Figure 3 The metallographic structure of test samples under a 100× light microscope.…”
Section: Resultsmentioning
confidence: 99%
“…After incorporation of both two hard particles into Material D, it is easy to form an agglomeration of particles (the area B in Figure 4(d)), which is caused by their size difference and poor wettability between each other. The agglomeration is not conducive to lubrication to a certain extent, because once the agglomerates fall off, larger wear debris will be formed, which will cause more serious damage to the wear surface [26]. Figure 4 SEM and EDX images of original surfaces of test samples.…”
Section: Resultsmentioning
confidence: 99%
“…More voids will lead to worse mechanical properties of copper alloy material and produce greater wear under dry friction. However, under lubrication conditions, the holes can store more lubricating mediums to maintain good friction and wear properties [26]. Generally speaking, grain size and mechanical properties of the material in a steady-state conform to the Hall-Pitch relationship, that is, the smaller the grain size, the stronger the mechanical properties of the metal [11].…”
The effects of molybdenum disilicide (MoSi2) and ferrophosphorus (FemPn) particles on the tribological properties of copper-tin bismuth (CuSn10Bi3) bimetallic bearing materials were studied in this paper. The samples of CuSn10Bi3 containing MoSi2 and/or FemPn were prepared by powder sintering technology and the metallographic structure of four kinds of self-lubricating copper alloy composite materials after sintering was observed. The tribological properties of the copper alloy composites under starved lubrication conditions were investigated and its worn surfaces and wear debris were discussed and analysed. The results show that the addition of MoSi2 and/or FemPn particles can effectively refine the grain size, optimise the grain boundary morphology, and improve the mechanical properties of the alloys. Under extreme working conditions, the hard particles reinforced copper-based alloy samples have better wear resistance and anti-seizure resistance. GRAPHICAL ABSTRACT
“…Oil bearings with porous matrix have been widely used in industrial applications for its low manufacturing cost and oil self-lubricating properties [1]. As the counterpart picks up speed, the oil impregnated in the porous bearing exuded to the surface and the hydrodynamic oil film formed.…”
In order to address poor lubrication of porous bearings due to the seepage flow of oil into the porous medium, multi-layered sintered composite bearings have been developed. Multi-layered bearings achieve a combination of high strength and good lubrication. Lubrication model of the porous multi-layer materials in polar coordinates was established based on Darcy's law. And the effect of surface Darcy flow and porous structure on the lubrication capacity were discussed by using the finite difference method. In the end, the tribology experiments of the multi-layer materials were presented on the end face tribo-tester to verify the simulation results. Results show that the lubrication performance of the multi-layer materials is better than that of the single layer materials. With the decrease of the surface porosity, the lubrication performance becomes better in the given range of surface layer. Also, it can be significantly improved if considering the surface Darcy flow. Within a certain range, the effects of surface Darcy flow on lubrication performance are more obviously with higher speed. There is a good agreement between the numerical analysis and the measurement. Research work provides a theoretical basis for analysis and design of multi-layer sintering bearing material.
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