A comparative study of the tribological behaviour of PVD coatings on the Ti-6Al-4V alloy
2010; Elsevier BV; Volume: 44; Issue: 3 Linguagem: Inglês
10.1016/j.triboint.2010.10.031
ISSN1879-2464
AutoresCarla Martini, Lorella Ceschini,
Tópico(s)Advanced materials and composites
ResumoThis work focuses on the tribological behaviour of PVD coated Ti-6Al-4V. Commercially available single layer CrN, CrN/NbN superlattice and multilayer WC/C coatings were taken into consideration. The dry sliding behaviour of the coated systems was studied by a flat-on-cylinder tribometer (load range 30–60 N). A critical load, corresponding to the end of coating life, was identified for each coated system. The highest critical loads were observed for CrN- and WC/C-coated Ti-6Al-4V. However, only WC/C also led to a significant decrease of the coefficient of friction. The good performance of WC/C-coated Ti-6Al-4V was ascribed to both the high H/E ratio of the coating and to the best match of elastic modulus with the substrate.
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