VISCOPLASTIC PROPERTIES AND TRIBOLOGICAL BEHAVIOR OF DIAMOND-LIKE CARBON FILMS USING NANOINDENTATION AND NANOSCRATCH TESTS

Viviane Turq (1) , Julien Fontaine (1) , Jean-Luc Loubet (1) , Denis Mazuyer (1)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

Diamond-Like Carbon (DLC) films have been shown to demonstrate various tribological behaviors: in ultra-high vacuum (UHV), with either friction coefficients as low as 0.01 or less and very mild wear, or very high friction coefficients (>0.4) and drastic wear. These behaviors depend notably on gaseous environment, hydrogen content of the film [1], and on its viscoplastic properties [2,3]. A relation between superlow friction in UHV and viscoplasticity has indeed been established for a-C:H films and confirmed for a fluorinated sample (a-C:F:H). In this study, nanoindentation and nanoscratch tests were conducted in ambient air, using a nanoindentation apparatus, in order to evaluate tribological behaviors, as well as mechanical and viscoplastic properties of different amorphous carbon films.

Mots clés: Viscoplasticity DLC Diamond-Like Carbon Thin coatings Mechanical properties

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Viviane Turq, Julien Fontaine, Jean-Luc Loubet, Denis Mazuyer. VISCOPLASTIC PROPERTIES AND TRIBOLOGICAL BEHAVIOR OF DIAMOND-LIKE CARBON FILMS USING NANOINDENTATION AND NANOSCRATCH TESTS. May 2005, pp.A-39. ⟨hal-00140293⟩