Aluminium oxide Al2O3, titanium oxide TiO2 and chromium oxide Cr2O3 are particularly suitable for wear protection. Zirconium oxide ZrO2 is very good for improving thermal resistance.
Aluminium oxide Al2O3 can also be used for improving electrical insulation.
Practically all metals and various alloys can be treated.
Tungsten carbide and chromium carbide, mixtures of these and other alloying elements