Influence of the components on the hardness and strength of highly porous silicon-carbide grinding wheels

Nosenko, V. A.; Dovgal, Alexey; Васильев, А. А.; Nosenko, S. V.

doi:10.3103/s1068798x08110245

Cited by 1 publication

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“…When grinding, the transfer of abrasive material to the treated surface is analyzed [17][18][19]. The concentration of chemical elements is proposed as a criterion for the intensity of physical and chemical interaction of an abrasive tool with the treated material [20,21]. In case of micro-scratching by a single crystal, the intensity of contact interaction should be evaluated by the transfer of the treated material to the wear area of the abrasive material [11].…”

Section: Introductionmentioning

confidence: 99%

“…It should be expected that its adhesive activity to silicon carbide will be less. Nevertheless, when grinding d-transition metals, niobium still has a sufficiently high adhesive activity to silicon carbide [20,21]. It should be taken into account that with increasing the atomic stability, the binding stability increases, which to a certain extent characterizes the strength of the bond between atoms in the condensed state.…”

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confidence: 99%

“…Nevertheless, when grinding d-transition metals, niobium still has a sufficiently high adhesive activity to silicon carbide. The transfer of abrasive material to the treated surface when grinding niobium is greater than when grinding titanium [21]. It is necessary to consider, that with the increase of nuclear stability, increases the binding stability which to a certain extent characterizes the bond strength between atoms in the condensed state, leading to increased load on the grain during grinding and increased probability of shear and pullout of silicon carbide grains.…”

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confidence: 99%

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Study of the Silicon Carbide Wear Area after Micro-Scratching of Titanium, Zirconium, Niobium and Molybdenum at a Speed of 35 m/s

Nosenko

Fetisov

Nosenko³

et al. 2021

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The authors conducted the study at micro-scratching of titanium, zirconium, niobium and molybdenum alloys. The content of the main element in alloys was from 99.5 to 99.7 %. Micro-cutting was carried out by specially prepared indenters with silicon carbide mono-crystals of a given shape. The state of the relief and the chemical composition of the wear area were studied using a scanning two-beam electron microscope. The micro-scratching speed was 35 m/s without cooling. The condition of the contact surfaces of silicon carbide and metals was studied at a magnification up to 100,000 times with the rotation and tilt of the microscope slide. The content of chemical elements was determined at individual spots of an object by scanning along the line and area. The authors also studied the condition of the wear area after micro-scratching of metals and after removal of metal adhesions by chemical etching. The intensity of metal transfer was determined by the average concentration of metal atoms at the wear area. The article also gives a classification of metals according to the intensity of transfer immediately after grinding and removal of metal adhesions. The influence of metal and the depth of micro-scratching on the morphology of the wear site is shown. It was found that molybdenum, having a low adhesive activity to silicon carbide, is able to penetrate microcracks and other surface defects during micro-scratching. The width of microcracks and the depth of metal penetration were determined

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