Multi-Material Thermal Barrier Coating System

摘要

The thermal barrier coating system comprises a matrix of a first chemistry with multiple embedded second phases of a second chemistry. The matrix comprises a stabilized zirconia. The second regions comprise at least 40 mole percent of oxides having the formula Ln2O3, where Ln is selected from the lanthanides La through Lu, Y, Sc, In, Ca, and Mg with the balance zirconia (ZrO2), hafnia (HfO2), titania (TiO2), or mixtures thereof. The second phases have a characteristic thickness (T6) of less than 2.0 micrometers (μm). The spacing between second phases has a characteristic thickness (T5) of less than 8.0 micrometers (μm).

主权项

1. A process for coating a substrate, the process comprising:
generating a plume of deposition material from a first source and a second source; alternating the composition of the plume by generating vapor from the first and second sources in an alternating manner; and moving the substrate relative to the first and second sources,wherein:
the moving of the substrate moves a given region of the substrate through the plume at a cyclic rate having a period greater than a duration of generation of the vapor plume from the second source.