Rotating Beam Fatigue Testing and Hybrid Ceramic Bearings

摘要

Silicon nitride is the material of choice for ceramic rolling bearings. The issueof low operational reliability in certain rolling contact applications in DoD systems may be related to its limited room temperature bending strength as compared with modern bearing steels. To explore the cyclic fatigue strength of silicon nitride, rotating beam fatigue tests have been performed for two types of high quality bearing-grade HPSN. A total of 122 rotating beam specimens have been