Abstract: A coated article includes a coated surface which consists of a substrate and a coating system. The coating system has at least one protective layer consisting of one or more transition metal borides and one dopant element, wherein: 13 the protective layer having chemical element composition defined by the formula TMxBySiq, where TM is one or more of the transition metal elements Chromium and Hafnium; Si is Silicon present in the protective layer as the dopant element; B is Boron; x is the concentration in atomic percent of TM; y is the concentration in atomic percent of B; and q is the concentration in atomic percent of Si, where x+y+q=1, 0.15?x?0.33, 0.40?y?0.67, and 0.1?q?0.40, and—the atomic concentration ratio of boron to the transition metals in the protective layer is higher or equal to 2, i.e. y/x?2, and—the protective layer exhibits an AlB2 crystal structure.

Abstract: The present invention relates to a coated article comprising a coated surface, the coated surface consisting of a substrate and a coating system, the coating system comprising at least one protective layer consisting of one or more transition metal borides and one dopant element, wherein: the protective layer having chemical element composition defined by the formula TMxBySiq, where TM is one or more transition metal elements selected from the group formed by Chromium, Cr, and Hafnium, Hf, Si is Silicon and is present in the protective layer as the dopant element, B is Boron, x is the concentration in atomic percent of TM in the protective layer, y is the concentration in atomic percent of B in the protective layer, and q is the concentration in atomic percent of Si in the protective layer, where x+y+q=1, 0.15?×?0.33, 0.40?y?0.67, and 0.1?q?0.40, and the atomic concentration ratio of boron to the transition metals in the protective layer is higher or equal to 2, i.e.