The use of Powder Metallurgy for promoting friction reduction under sliding-rolling lubricated conditions

Autor(es)

Boidi, G. ^{[1, 2, 3]} ; Profito, F. J. ^[1] ; Kadiric, A. ^[3] ; Machado, I. F. ^[1] ; Dini, D. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Politecn, Sao Paulo - Brazil

^[2] AC2T Res GmbH, Viktor Kaplan Str 2-C, A-2700 Wiener Neustadt - Austria

^[3] Imperial Coll London, Dept Mech Engn, Tribol Grp, South Kensington Campus, Exhibit Rd, London SW7 2AZ - England

• Tipo de documento: Artigo Científico
• Fonte: TRIBOLOGY INTERNATIONAL; v. 157, MAY 2021.
• Citações Web of Science: 1

Resumo

This work exploits the use of different sintering manufacturing techniques for obtaining superior performances in lubricated point contacts. Disc and ball specimens were manufactures varying porosity and pore characteristics. The effect of surface pores in sintered materials was evaluated based on the frictional behaviour under different sliding-rolling conditions and lubrication regimes. Furthermore, lubricant film thicknesses were measured using interferometric technique. Test results showed that the decrease of porosity generally improves tribological performance. Low porosity surfaces can promote friction reduction compared to non-porous reference materials in specific configurations and operating with similar specific lubricant thickness values. This work contributes to an improved understanding of how randomly distributed micro-irregularities could change lubrication conditions, potentially increasing the efficiency of lubricated mechanical systems. (AU)

• Processo FAPESP: 17/21151-8 - Efeito tribológico das micro irregularidades superficiais (textura e porosidade) em condições de rolamento e deslizamento
• Beneficiário: Guido Boidi
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto
• Processo FAPESP: 16/25067-9 - Estudo do efeito de micro irregularidades superficiais (textura e porosidade) no comportamento tribológico de um aço sinterizado via SPS
• Beneficiário: Guido Boidi
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto