Ceramic balls are the key parts of ceramic ball bearings. The manufacturing quality and the cost of ceramic balls affect the performances and applications of ceramic ball bearings. In this paper, the machining efficiency, precision, surface quality and costs of ceramic balls are considered synthetically, the importance of the shaping process for green balls before sintering and the lapping process after sintering is discussed systematically, and several methods of shaping and lapping are compared.
In this paper, the influences of depositing angles on TbFe film magnetic and
magnetostrictive characteristics were discussed. TbFe films were deposited by DC magnetron sputtering. With the decrease of depositing angles from 900 to 150, TbFe film in-plane magnetization measured at 1600kA.m-1 external field is greatly increased. With the decrease of depositing angles from 900 to 150, the magnetostrictive saturation field is decreased. TbFe film in-plane magnetostriction is improved when depositing angles are changed from 900 to 150. Magnetic domain
structures detected by MFM indicates that film easy magnetization direction is gradually changed from perpendicular to parallel with the decrease of depositing angles. The variation of film magnetic and magnetostrictive performances can be explained by the oblique anisotropy associated with columnar grain morphology of the films.
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