Fracture Analysis of an All-Ceramic Bearing System
ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE
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The report summarizes the fracture mechanism of an all-ceramic duplex spin bearing which was tested to failure to establish a design load margin. This bearing is part of a gyro-optics assembly being developed for use in an infrared seeker. The analysis revealed that machining-induced microcracks grew in the inner raceways beneath a ball. These microcracks coalesced to form macrocracks which led to fracture of the inner race and the failure of the bearing system.
- Ceramics, Refractories and Glass
- Machinery and Tools
- Infrared Detection and Detectors