High temperature resistant coating with locally embedded protrusions and its application process

摘要

The protective thermal coating (4) on the surface of a metal substrate (1) is composed of MCrAlY (M is at least one of the elements Fe, Co and Ni). Local projections as rivets (3) are distributed over the substrate either directly on the substrate surface or indirectly through an intermediate layer (2) with a firm joint between the substrate surface and the intermediate layer. The MCrAlY metal coating is deposited on the surface of the substrate or intermediate layer, wholly encapsulating the rivets and the spaces between the rivets are wholly filled by the coating.