Cooling channel systems for high-temperature components covered by coatings, and related processes

摘要

A method for providing a fluid cooling system within a high temperature component is described. At least one microchannel is formed in an external surface of the component; and one or more coolant passage holes are then formed, extending from at least one of the microchannels to an interior region of the component. A layer of a metallic structural coating is then applied over the external surface. At least one slot, or a set of relatively small passive cooling holes, are then formed through the metallic structural coating; extending into at least a portion of the microchannels. A second coating layer is then applied over the first layer. In some embodiments, a sacrificial material is deposited into the microchannels before the first coating layer is applied. Related articles are also described.

主权项

1. A method for providing a fluid cooling system within a high temperature component, comprising the following steps:
a) forming at least one microchannel in an external surface of the component; b) forming one or more coolant passage holes extending from at least one of the microchannels to an interior region of the component; c) filling the microchannels and the coolant passage holes with a filler material; d) applying a first layer of a metallic structural coating over the external surface; e) forming at least one slot or a set of relatively small passive cooling holes through the first layer of the metallic structural coating; wherein the slot or the passive cooling holes extend into at least a portion of one of the filled microchannels which are generally aligned below the slot or below the passive cooling holes; f) removing the filler material; and g) applying at least a second coating layer over the first layer.