Structural, chemical, optical and mechanical properties of Au doped AlN sputtered coatings
Por:
Figueiredo N.M., Vaz F., Cunha L., Rodil S.E., Cavaleiro A.
Publicada:
25 sep 2014
Resumen:
This paper is focused on the structure, chemical composition, optical and mechanical properties of coatings consisting in an Al. N matrix incorporating different Au contents (up to 2.5. at.%). The Au was incorporated in the matrix atomically or in the form of very small nanoparticles (<. 1. nm). With the increase in the Au content both the refractive index and the coefficient of extinction were increased. The AlN matrix presented a crystalline wurtzite phase, stable up to 1000. °C.With annealing at 400. °C the precipitation of XRD detectable Au nanoparticles was possible, originating SPR light absorption. The Al. N. +. Au coatings exhibited hardness values between 15 and 24. GPa, with no significant changes after the annealing treatments at low temperatures. These coatings are of interest to the decorative applications. © 2014 Elsevier B.V.
Filiaciones:
Figueiredo N.M.:
SEG-CEMUC, Department of Mechanical Engineering, University of Coimbra, Portugal
Vaz F.:
Center of Physics, University of Minho, Portugal
Cunha L.:
Center of Physics, University of Minho, Portugal
Rodil S.E.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Mexico D.F., Mexico
Cavaleiro A.:
SEG-CEMUC, Department of Mechanical Engineering, University of Coimbra, Portugal
All Open Access; Green
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