The effect of yttrium on cathodic arc evaporated Ti0.45Al0.55N coating

► The addition of Y does not change the crystalline phase of Ti0.45Al0.55N. ► The hardness of Ti0.45Al0.54Y0.01N increases by 24%. ► The oxidation resistance of Ti0.45Al0.54Y0.01N coating is superior to Ti0.45Al0.55N. ► We explained why the oxidation resistance of Ti0.45Al0.54Y0.01N coating is improved.