Ground equipment with heat-resistant walls for environmental protection

摘要

The disclosure is concerned with a thermal land machine which comprises a heat resistant wall for confining a chamber; a heat resistant composite structure disposed in the chamber and in contact with a hot flowing gas; and means for introducing the hot gas toward the surface of the composite structure. The composite structure comprises a heat resistant substrate (102) and a continuous refractory coating (101) formed on the substrate and made of a ceramic material. The refractory coating is characterized by comprising at least two layers in a laminated structure each having fine cracks (103) substantially extended in the direction of the thickness of each of the layers and filled with a refractory material in such a manner that the filled cracks in one layer are disconnected with the filled cracks in the adjacent layer. Therefore, the hot gas cannot permeate into he surface of the substrate (102).