Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2006-08-28
2010-06-22
Blackwell, Gwendolyn (Department: 1784)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S689000, C428S697000, C428S908800, C416S24100B, C416S24100B
Reexamination Certificate
active
07740960
ABSTRACT:
A multilayered coating system consisting of a multicomponent zirconia-base or hafnia-base oxide top layer, an interlayer comprised of a plurality of sublayers and a bond coat layer is provided. The multilayered coating system of the present invention, with an interlayer comprised of a plurality of sublayers, provides a protective coating solution for silicon-base ceramic components exposed to very high temperatures and/or high gas flow velocity water vapor combustion environments. The plurality of sublayers affords for a multitude of interfaces that aid in phonon scattering within the coating system and thereby reduces its thermal conductivity. Furthermore, the plurality of interlayer sublayers afford a strain tolerant buffer between the top layer and substrate and thereby accommodate the thermal expansion mismatch between the oxide top layer (coefficient of thermal expansion (CTE) up to ˜8-10×10−6m/m-C) and the silicon-base ceramic substrate (CTE≈4-5×10−6m/m-C).
REFERENCES:
patent: 5687679 (1997-11-01), Mullin et al.
patent: 6444335 (2002-09-01), Wang et al.
patent: 6485848 (2002-11-01), Wang et al.
patent: 6733908 (2004-05-01), Lee et al.
patent: 6740364 (2004-05-01), Lau et al.
patent: 6759151 (2004-07-01), Lee
patent: 6764779 (2004-07-01), Liu et al.
patent: 6812176 (2004-11-01), Zhu et al.
patent: 7001859 (2006-02-01), Zhu et al.
patent: 2002/0045053 (2002-04-01), Hoskin
patent: 2004/0175597 (2004-09-01), Litton et al.
patent: 2005/0142395 (2005-06-01), Spitsberg et al.
patent: 2006/0154093 (2006-07-01), Meschter et al.
patent: 2006/0166016 (2006-07-01), Spitsberg et al.
patent: 2006/0166019 (2006-07-01), Spitsberg et al.
Miller Robert A.
Zhu Dongming
Blackwell Gwendolyn
Spevack A. David
Stolarun Edward L.
The United States of America as represented by the Secretary of
LandOfFree
Multifunctionally graded environmental barrier coatings for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multifunctionally graded environmental barrier coatings for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multifunctionally graded environmental barrier coatings for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4184412