Stock material or miscellaneous articles – Composite – Of metal
Patent
1996-12-12
2000-09-12
Nguyen, Nam
Stock material or miscellaneous articles
Composite
Of metal
4284722, 428623, 428629, 416241B, B32B 900
Patent
active
061175609
ABSTRACT:
A new family of ceramic materials is identified having particular utility as thermal insulating or thermal barrier coatings on metallic substrates. The ceramic materials have a pyrochlore structure and are typified by the composition A.sub.2 B.sub.2 O.sub.7 where A and B are various ions and O is oxygen. A may have a positive charge of 3.sup.+ or 2.sup.+ and B may have a positive charge of 4.sup.+ or 5.sup.30. These materials are characterized by having chemical stability, thermal stability and thermal insulating properties superior to those of currently used thermal barrier ceramics. An example pyrochlore material is lanthanum zirconate.
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Nguyen Nam
Sohl Charles E.
United Technologies Corporation
VerSteeg Steven H.
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