| 摘要 |
PROBLEM TO BE SOLVED: To reduce the mutual diffusion of elements between a base material and a connecting coat by providing a heat insulation coating layer, a high density metal connecting coating layer, a composite metal/metal oxide connected coating layer and a base material. SOLUTION: This multi-layer heat insulation coating system has a heat insulation coating layer 10, an oxide layer grown by heat (a heat growing oxide layer) 18, a high density metal connected coating layer 12, a composite metal/metal oxide connected coating layer 14 and a base material 16. The heat insulation coating layer 10 is an yttrium-stabilized zirconia layer applied by an air plasma flame spray process. The growth oxide layer 18 is typically constituted of an aluminum oxide. The high density metal connecting coated layer 12 is, for example, an MCrAlY alloy coated by a vacuum plasma flame spray process (M represents both nickel and cobalt or either of these elements). The composite metal/metal oxide layer 14 works as a diffusion shut-off layer, and is applied as a cladding e.g. by an air plasma flame spray process. The base material 16 is a constituent element working as a route for a high temperature gas including a burner, a transfer part, a stationary blade, a moving blade and a sealing segment.
|
