Abradable ceramic coatings and coating systems

摘要

The disclosure relates to a high temperature mechanical system, such as a gas turbine engine, including a first coating deposited on a first substrate and a second coating deposited on a second substrate. The first coating includes a first bond layer, a second bond layer, and a first ceramic outer layer, wherein the second bond layer is between the first bond layer and first ceramic outer layer. The second coating includes a third bond layer deposited on the substrate and a second ceramic outer layer deposited on the third bond layer. The second coating is configured to abrade the first coating, e.g., during operation of the high temperature mechanical system.

主权项

1. A system comprising:
a first coating deposited on a first substrate, the first coating comprising a first non-ceramic bond layer, a second non-ceramic bond layer, and a first ceramic outer layer, wherein the second non-ceramic bond layer is between the first non-ceramic bond layer and the first ceramic outer layer, wherein the first non-ceramic bond layer defines a first porosity and the second non-ceramic bond layer defines a second porosity that is greater than the first porosity; and a second coating deposited on a second substrate, the second coating comprising a third non-ceramic bond layer deposited on the substrate and a second ceramic outer layer deposited on the third bond layer, wherein the second coating is configured to abrade the first coating, and wherein during operation of the system, the second coating abrades the first ceramic outer layer of the first coating.