Material modification for antifriction bearings
Authors: Shebeshev K.I., Ivanov I.M. | |
Published in issue: #2(19)/2018 | |
DOI: 10.18698/2541-8009-2018-2-260 | |
Category: Mechanical Engineering and Machine Science | Chapter: Technology and Equipment of Mechanical and Physical Processing |
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Keywords: ceramics, antifriction bearing, silicon nitride, pressure sintering, density, porosity, solidity |
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Published: 12.02.2018 |
The article considers a technological process for getting the material and manufacturing the workpieces of the antifriction bearing ceramic bodies. It investigates the composition of the powder ceramic material containing silicon nitride, yttrium oxide and aluminium oxide as well as sintering additives. By means of the microanalysis methods we have examined the composition of ceramics. We have developed a process flow pattern for pressure sintering of the ceramic rolling bodies’ workpieces including three stages: 1) preparation of the material in the planetary mill up to 3 µm degree of dispersion with afterbaking; 2) making the press forming by means of compacting the charge material powder in the steel dieset; 3) producing the workpieces by means of pressure sintering of the pressings in the graphite dieset.
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