One of the most promising, generally applicable and well-adopted methods to enhance
the surface performance of materials is the use of coatings. The reason is
that it is extremely difficult and expensive to meet homogeneous materials having
on their surface the ensemble of desired properties, such as high hardness, wear
resistance, adequate stiffness, increased ductility, chemical inertness, stainlessness,
controllable electrical and thermal conductivity behavior, etc.