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Communication Dans Un Congrès Année : 2009

Hardness and scratch response of PVD multilayer coatings

Résumé

In the present investigation, novel Cr/CrN, CrN/CrAlN and Cr/CrN/CrAlN multilayered coatings thin films have been developed by dual RF magnetron sputtering. They consist of superposing Cr, CrN and CrAlN layers of 50-500nm thick, up to a total thickness of 0.45-1μm. These coatings were grown on AISI4140 steel samples. The mechanical properties of these coatings were studied by scratch-tests and nano-indentation measurements. The hardness of the films reaches 15.8 GPa for a Cr/CrN multilayered coating sputtered at a bias voltage of -900V. High peak load tests were used to estimate the film adhesion on steel substrates; critical loads (Lc2) of 11N showed weak adhesion properties of the film. Moreover, an inventory of the major scratch-tests failure modes was established, which were classified into plastic deformation and different forms of cracking, spallation and coating perforation events. No evidence of interfacial failure(s) of the sub-layers was observed after the adhesion and nanoindentation tests.
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Dates et versions

hal-00908722 , version 1 (27-11-2013)

Identifiants

  • HAL Id : hal-00908722 , version 1
  • ENSAM : http://hdl.handle.net/10985/7534

Citer

Brahim Tlili, Corinne Nouveau, Yacine Benlatreche, Nasri Mustapha, Michel Lambertin. Hardness and scratch response of PVD multilayer coatings. 3ème Congrès International Conception et Modélisation des Systèmes Mécaniques, Mar 2009, Tunisia. 7p. ⟨hal-00908722⟩
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