TRIBOLOGICAL TESTING OF THERMALLY AGED GREASES

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2016

Autores

Goncalves, D (Autor) Outra; Campos, A (Autor) Outra; Graca, B (Autor) Outra; Jorge Seabra (Autor) FEUP

Ata de Conferência Internacional

Título: Integrity-Reliability-Failure

Páginas: 383-398

Indexação

ISI Web of Knowledge - 0 Citações

Outras Informações

ID Authenticus: P-00M-91B

Abstract (EN): Non-additized batches of lubricating greases were subjected to an artificial thermal aging procedure. The fresh and aged samples were then tribologically characterized through film thickness measurements and Stribeck curves, over a large range of entrainment speeds on a ball-on-disc test rig at different operating temperatures, ensuring fully flooded conditions. The results were analysed at the light of the physical and chemical changes regarding the fresh greases. The film thickness increased for all greases after the thermal aging. The film thickness plateau at low speeds also changed and for certain greases it disappeared under the same range of entrainment speeds. The friction behaviour also changed considerably.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16