Low thermal expansion bondcoats for thermal barrier coatings

Details Low thermal expansion bondcoats for thermal barrier coatings Low thermal expansion bondcoats for thermal barrier coatings

2011-03-22

2011-03-22

Austin, Aaron (Department: 1784)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S678000, C428S215000, C416S24100B

Reexamination Certificate

active

07910225

ABSTRACT:
This invention relates to low thermal expansion bondcoats for thermal barrier coatings. The bondcoats comprise: (i) an inner layer comprising an inner layer alloy of MCrAlM′, and (ii) an outer layer comprising an outer layer alloy of MCrAlM′, wherein M is an element selected from nickel, cobalt, iron and mixtures thereof, and M′ is an element selected from yttrium, zirconium, hafnium, ytterbium and mixtures thereof. The inner layer alloy is thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 50 microns. The outer layer alloy is thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 30 microns to about 100 microns. The bondcoat has a thermal expansion of about 6.5 millimeters per meter or less between a temperature of from about 25° C. to about 525° C.

REFERENCES:
patent: 3754903 (1973-08-01), Goward et al.
patent: 3785877 (1974-01-01), Bailey
patent: 5073433 (1991-12-01), Taylor
patent: 5455119 (1995-10-01), Taylor et al.
patent: 5741556 (1998-04-01), Taylor et al.
patent: 5863668 (1999-01-01), Brindley et al.
patent: 5981091 (1999-11-01), Rickerby et al.
patent: 6093454 (2000-07-01), Brindley et al.
patent: 6610419 (2003-08-01), Stamm
patent: 6703137 (2004-03-01), Subramanian
patent: 6838190 (2005-01-01), Lee et al.
patent: 2007/0187005 (2007-08-01), Taylor
patent: 2007/0190354 (2007-08-01), Taylor
patent: 2008/0199684 (2008-08-01), Apte et al.
patent: 2008/0199722 (2008-08-01), Apte et al.
patent: 61106763 (1986-05-01), None
T.A. Taylor, et al., “Thermal expansion of MCrAlY alloys”, Surface & Coatings Technology 177-178 (2004) 24-31.
Thomas A. Taylor, “Dilatometer Studies of NiCrAlY Coatings”, International Conference on Metallurgical Coatings and Thin Films Apr. 19-23, 2004.

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