Effect of the substrate dilution on the room and high temperature tribological behaviour of Ni-based coatings deposited by PTA on grey cast iron》.pdf

Surface Coatings Technology 281 (2015) 11–19 Contents lists available at ScienceDirect Surface Coatings Technology j ournal homepage : www.el /l oc ate/ surfcoat Effect of the substrate dilution on the room and high temperature tribological behaviour of Ni-based coatings deposited by PTA on grey cast iron F. Fernandes a,⁎, T. Polcar b,c, A. Loureiro a, A. Cavaleiro a a CEMUC-Department of Mechanical Engineering, University of Coimbra, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal b Department of Control Engineering, Czech Technical University in Prague, Technicka 2, Prague 6 166 27, Czech Republic c n-CATS, University of Southampton, Highfi eld Campus, SO17 1BJ Southampton, UK a r t i c l e i n f o a b s t r a c t Article history: In the present investigation the effect of the substrate dilution on room and high temperature (550 and 700 °C) Received 30 April 2015 tribological behaviour of nickel based hardfaced coating deposited by plasma transferred arc onto a grey cast iron Revised 18 September 2015 was investigated and compared to the uncoated grey cast iron. At room temperature, the wear loss of coatings Accepted in revised form 19 September 2015 was independent of the substrate dilution and similar to the grey cast iron. At high temperatures, coating pro- Available online 21 September 2015 duced with high dilution displayed the highest wear resistance between all the samples. This is attributed to