A Preliminary Study on the Tribological Compliance of Ball and Race Materials for Application in Unlubricated Hybrid Bearings
Tribological compliance of various steel grades, metal matrix composites, and Si3N4 ceramics against Si3N4 balls of different grain sizes and surface finishes, as well as reference AISI 52100 steel balls, was investigated under reciprocating sliding tests. Both constant and oscillating loads were us...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/393248 |
| Acceso en línea: | http://hdl.handle.net/10261/393248 |
| Access Level: | acceso abierto |
| Palabra clave: | Friction Wear Silicon nitride Steel Hybride ball bearings |
| Sumario: | Tribological compliance of various steel grades, metal matrix composites, and Si3N4 ceramics against Si3N4 balls of different grain sizes and surface finishes, as well as reference AISI 52100 steel balls, was investigated under reciprocating sliding tests. Both constant and oscillating loads were used to better simulate real operational conditions of hybrid ball bearings. Adhesive wear was the dominant mechanism for both ceramic/ceramic and ceramic/steel contacts. Unpolished nanometer-grain Si3N4 balls exhibited superior adaptability and reduced wear compared to polished ones. Among the various combinations tested, the unpolished Si3N4 ball paired with a metal matrix composite demonstrated the lowest friction coefficient and minimal wear. The formation of a tribofilm at the sliding interface was observed. |
|---|