B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 15/04 (2006.01) C23C 14/08 (2006.01) C23C 16/22 (2006.01) C23C 28/00 (2006.01) C23C 14/22 (2006.01)
Patent
CA 2258432
A metallic article (30) comprises a bond coating (34) on the metallic article (30) and a ceramic thermal barrier coating (38) on the bond coating (34). The ceramic thermal barrier coating (38) comprises a plurality of columnar grains (40) which extend perpendicularly to the surface of the metallic article (30). Each columnar grain (40) has a plurality of layers (42,44). Some of the layers (44) have sub-grains (48) extending at an acute angle to the surface of the metallic article (30) to form voids (50) between adjacent sub-grains (48). The voids (50) are arranged at an acute angle to the surface of the metallic article (30) and thereby reduce the thermal conductivity of the ceramic thermal barrier coating (38). Some of the layers (42) have sub-grains (46) extending perpendicularly to the surface of the metallic article (30) to provide erosion resistance.
Chromalloy United Kingdom Limited
Mccarthy Tetrault Llp
Rolls-Royce Plc
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