Process for producing a thermally insulating coating system on a metallic substrate

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Production of a heat-insulating layer system consisting of a barrier layer (2), hot gas corrosion-protection layer (3), protective layer (4), heat-insulating layer (5) and smoothing layer (6) on a metallic substrate (1) comprises applying the layer system in a single working cycle using low pressure plasma spraying. An Independent claim is also included for a component manufactured using the above process. Preferred Features : The metallic barrier layer is made of an NiAl or NiCr alloy. The hot gas corrosion-protection layer is made of an MCrAlY alloy (where M is Fe, Co or Ni, or a metal aluminide). The protective layer is made of aluminum oxide or a ternary Al-Zr-O compound. The heat-insulating layer and the smoothing layer are made of an oxide ceramic substance, especially containing zirconium oxide, and a stabilizer, especially consisting of rare earth oxides, preferably yttrium oxide or cerium oxide.