Young's modulus and Poisson coefficient were
obtained from indentation load-displacement data, obtained during
one cycle of loading and unloading, according to ISO/DIS
14577-2 in a durometer Fischer model Fischerscope HC-100.
Fracture toughness was calculated based on the Vickers hardness
measurements according to JIS R 1607. Roughness parameters were
measured three times with an optical profilometer from Taylor
Robson model CCI according to ISO 25178-2, using 20 magnification
and 0.8 field of view (FOV). The point of zero charge PZC
was obtained from the literature [