Nanoscopic origin of the dissipative friction forces on a diamond tip sliding on magnetite surfaces

Autor(es)

Bogoni Jr, Nerio ; Menezes, Caren M. ^[1] ; Costi, Fernanda B. ^[1] ; Perotti, Bruna L. ^[1] ; Echeverrigaray, Fernando G. ^[1] ; Perottoni, Claudio A. ^[1] ; Alvarez, Fernando ^[2] ; Figueroa, Carlos A. ^[1]

Afiliação do(s) autor(es)

^[1] Bogoni Jr, Jr., Nerio, Univ Caxias do Sul, PGMAT, BR-95070560 Caxias Do Sul, RS - Brazil

^[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13081970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Thin Solid Films; v. 660, p. 258-262, AUG 30 2018.
• Citações Web of Science: 1

Resumo

Fundamental understanding of friction forces at the micro/nanoscale continues being a challenge in tribology. This work reports on the friction behavior of the outermost magnetite layers grown on a nitrided ferrous alloy studied by two different and independent experimental methods: nanoindentation followed by unidirectional sliding and friction force microscopy. Macroscopic mechanical properties involving hardness (H) and Young modulus (E), such as the plastic deformation parameter (H-3/E-2) and the elastic strain to failure (H/E), as well as surface roughness cannot explain the lack of influence of the friction coefficient on the outermost magnetite layer thickness. Moreover, the observed energy dissipation phenomenon is consistent with phononic non-conservative damping forces. (AU)

• Processo FAPESP: 12/10127-5 - Pesquisa e desenvolvimento de materiais nanoestruturados para aplicações eletrônicas e de física de superfícies
• Beneficiário: Fernando Alvarez
• Modalidade de apoio: Auxílio à Pesquisa - Temático