Compositions: ceramic – Ceramic compositions – Yttrium – lanthanide – actinide – or transactinide containing
Reexamination Certificate
2006-06-27
2006-06-27
Group, Karl (Department: 1755)
Compositions: ceramic
Ceramic compositions
Yttrium, lanthanide, actinide, or transactinide containing
C501S128000, C501S127000, C415S200000, C428S325000, C428S329000, C428S450000, C428S469000, C428S472000, C416S24100B
Reexamination Certificate
active
07067447
ABSTRACT:
A material (100) formed of a sintered aggregation of ceria particles (106), mullite particles (108) and an alumina matrix material (110). Differential thermal expansion of the ceria and mullite particles generates thermal stress sufficient to create micro-cracking of the ceria particles. The ratio of ceria to mullite may be selected to achieve a desired coefficient of thermal expansion for matching the thermal growth of a mating CMC material (102). The micro cracks provide the material with a desired degree of strain tolerance useful in high temperature applications such as a solid core gas turbine vane (20).
REFERENCES:
patent: 3910716 (1975-10-01), Roughgarden et al.
patent: 4396349 (1983-08-01), Hueber
patent: 4519745 (1985-05-01), Rosman et al.
patent: 4530884 (1985-07-01), Erickson et al.
patent: 4563125 (1986-01-01), Boudigues et al.
patent: 4563128 (1986-01-01), Rossmann
patent: 4629397 (1986-12-01), Schweitzer
patent: 4639189 (1987-01-01), Rosman
patent: 4643636 (1987-02-01), Libertini et al.
patent: 4645421 (1987-02-01), Huether
patent: 4768924 (1988-09-01), Carrier et al.
patent: 4790721 (1988-12-01), Morris et al.
patent: 4838031 (1989-06-01), Cramer
patent: 4907946 (1990-03-01), Ciokajlo et al.
patent: 5027604 (1991-07-01), Krueger
patent: 5226789 (1993-07-01), Donges
patent: 5306554 (1994-04-01), Harrison et al.
patent: 5314309 (1994-05-01), Blakeley et al.
patent: 5322823 (1994-06-01), Ueda et al.
patent: 5328331 (1994-07-01), Bunker et al.
patent: 5358379 (1994-10-01), Pepperman et al.
patent: 5375978 (1994-12-01), Evans et al.
patent: 5382453 (1995-01-01), Mason
patent: 5484258 (1996-01-01), Isburgh et al.
patent: 5493855 (1996-02-01), Walters et al.
patent: 5494402 (1996-02-01), Glezer et al.
patent: 5584652 (1996-12-01), Shaffer et al.
patent: 5605046 (1997-02-01), Liang
patent: 5616001 (1997-04-01), Boyd
patent: 5630700 (1997-05-01), Olsen et al.
patent: 5640767 (1997-06-01), Jackson et al.
patent: 5720597 (1998-02-01), Wang et al.
patent: 5791879 (1998-08-01), Fitzgerald et al.
patent: 5820337 (1998-10-01), Jackson et al.
patent: 6000906 (1999-12-01), Draskovich
patent: 6164903 (2000-12-01), Kouris
patent: 6197424 (2001-03-01), Morrison et al.
patent: 6200092 (2001-03-01), Koschier
patent: 6241469 (2001-06-01), Beeck et al.
patent: 6280550 (2001-08-01), Steibel et al.
patent: 6325593 (2001-12-01), Darkins, Jr. et al.
patent: 6368663 (2002-04-01), Nakamura et al.
patent: 6465090 (2002-10-01), Stowell et al.
patent: 6514046 (2003-02-01), Morrison et al.
patent: 6554563 (2003-04-01), Noe et al.
patent: 6558814 (2003-05-01), Spitsberg et al.
patent: 6641907 (2003-11-01), Merrill et al.
patent: 6709230 (2004-03-01), Morrison et al.
patent: 6723674 (2004-04-01), Wang et al.
Akopov, F.A., et al. Cerium Dioxide Refractory Materials. UNITECR '89, pp. 1071-1080.
Podkletnov, E.E. et al. Increasing the Thermal-Shock Resistance of Ceramics Based on Cerium Dioxide Plus Additives. Institute of High Temperatures, Academy of Sciences of the USSR. D.I. Mendeleev Moscow Chemical Technology Institute. pp. 144-147. Transl. from Ogneupory, No. 3, pp. 20-22, Mar. 1984.
Podkletnov, E.E. Properties of a Cerium Dioxide Based Ceramic with Filamentary Crystals. Institute of High Temperature, Academy of Sciences of the USSR. Physics Institute, Academy of Sciences of the USSR. p. 307-310. Translated from Steklo I Keramika, No. 7, p. 21-22, Jul. 1984.
Podkletnov, E.E. et al. Structure and Properties of Highly Refractory Ceramics Based on Cerium Dioxide and Its Solid Solutions. Institute of High Temperatures, Academy of Sciences of the USSR. D.I. Mendeleev Moscow Inst. Chemical Technology Institute. pp. 87-90. Transl. from Ogneupory, No. 2, pp. 26-29 (1984).
Podkletnov, E.E. et al. Thermal Shock Resistance and the Mechanical Properties of the Refractory Materials Based on Zirconium and Cerium Dioxides with Layered-Granular Structure. High Temp. Inst, Acadmey of Sciences of the USSR. Scientific-Research Int. of Graphite, p. 476-479, (1986).
Sameshima, S. et al. Thermal Expansion of Rare-Earth-Doped Ceria Ceramics. Journal of the Ceramic Society of Japan, v. 110, No. 7, 2002, pp. 597-600.
Atlantic Equipment Engineers. Cerium Oxide CeO2172.31. Bergenfield, NJ: AEE. www.micronmentals.com/cerium—oxide.htm, no date.
Cerium: A Guide to its Role in Chemical Technology. Published by Molycorp, Inc., Mountain Pass, CA, 1992 (reprinted 1995).
CERAMUL—64. Property. www.mahavir-india.com/products/ceramul-64.htm, no date.
Cerium Oxide Powder. www.reade.com/Products/Oxides/cerium—oxide.html, no date.
Kemco International Associates. Technology Serving the World. Westlake, OH: KIA, Inc., www.kemcointernational.com/CeriumOxide.htm, no date.
Kyanite Mining Corporation. Chemical Analysis. www.kyanite.com/chemicalanalysis.html, no date.
Kyanite Mining Corporation. Typical Particle Size Distribution of Virgnia Kyanite & Mullite. www.kyanite.com/mullitemesh.html, no date.
Kyanite Mining Corporation. Mullite: 3(Al2O3). 2(SiO2). www.kyanite.com/mullite.html, no date.
Kyanite-Mullite Statistics and Information. http://Minerals.er.usgs.gov/minerals/pubs/commodity/kyanite, no date.
Group Karl
Siemens Power Generation, Inc.
LandOfFree
Strain tolerant aggregate material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Strain tolerant aggregate material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strain tolerant aggregate material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3665904