B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 15/04 (2006.01) C04B 37/02 (2006.01) C23C 14/08 (2006.01) C23C 28/00 (2006.01)
Patent
CA 2165641
A ceramic thermal barrier coating layer (28) for a superalloy article (20) is caused to adhere to the superalloy article (20) by applying platinum to the superalloy article (20) and heat treating at a temperature of 1100°C to 1200°C for one hour. This causes aluminium to diffuse from the superalloy article (20) into the platinum to form a platinum enriched outer layer (24) which generally comprises a platinum enriched gamma phase (36) and a platinum enriched gamma prime phase (38). An alumina layer (26) is formed between the platinum enriched outer layer (24) and a ceramic coating (28). The platinum enriched gamma phase (36) and the platinum enriched gamma prime phase (38) in the outer layer (24) reduces the migration of transition metal elements to the ceramic coating (28) to enable a very pure alumina layer (26) to be formed.
Bell Stanley Russel
Rickerby David Stafford
Wing Rodney George
Chromalloy United Kingdom Limited
Gowling Lafleur Henderson Llp
Rolls-Royce Plc
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