Abstract: The present invention relates to a layer system, comprising a metallic substrate (1) having the following layers applied on a side (A) thereof from the inside to the outside in the specified order: 4) a layer composed of a material selected from among substoichiometric oxides and oxynitrides of titanium and zirconium or from among metals, selected from among titanium, zirconium, molybdenum, platinum, and chromium or an alloy using one of these metals or of at least two of these metals, 5a) a layer composed of a nickel alloy having chromium, aluminum, vanadium, molybdenum, cobalt, iron, titanium, and/or copper as an alloying partner, or composed of a metal selected from among copper, aluminum, chromium, molybdenum, tungsten, tantalum, titanium, platinum, ruthenium, rhodium, and alloys using one of these metals, or of at least two of these metals, or composed of iron, steel or stainless steel, provided the layer may only consist of aluminum if the reflector layer 6) is formed of aluminum and that, in this case,

Abstract: The present invention pertains to a composite material for use as a selective solar absorber with a carrier layer (1), wherein at least the following layers are present on a side (B) of the carrier layer: A reflection layer (3), an absorber layer (5) and a dielectric and/or oxidic antireflection layer (7), wherein a layer (4) consisting of a nitride, a carbide or a carbonitride of a metal or of a mixture of two or more metals from subgroup IV, V or VI is located between absorber layer (5) and reflection layer (3), and an optically active layer (6) consisting of a metal compound with stoichiometric composition is located between absorber layer (5) and the dielectric antireflection layer (7).