Stock material or miscellaneous articles – Composite – Of metal
Patent
1993-07-13
1994-06-14
Turner, A. A.
Stock material or miscellaneous articles
Composite
Of metal
4151744, 416241B, 428469, 428615, 428622, 428623, 428632, 428633, 428636, 428697, 428699, 428701, 428702, B32B 1520
Patent
active
053209095
ABSTRACT:
A thermal barrier coating for metal articles subjected to rapid thermal cycling includes a metallic bond coat deposited on the metal article, at least one MCrAlY/ceramic layer deposited on the bond coat, and a ceramic top layer deposited on the MCrAlY/ceramic layer. The M in the MCrAlY material is Fe, Ni, Co, or a mixture of Ni and Co. The ceramic in the MCrAlY/ceramic layer is mullite or Al.sub.2 O.sub.3. The ceramic top layer includes a ceramic with a coefficient of thermal expansion less than about 5.4.times.10.sup.-6 .degree.C.sup.-1 and a thermal conductivity between about 1 J sec.sup.-1 m.sup.-1 .degree.C.sup.-1 and about 1.7 J sec.sup.-1 m.sup.-1 .degree.C.sup.-1.
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Scharman Alan J.
Yonushonis Thomas M.
Cummins Engine Co.
Romanik George J.
Turner A. A.
United Technologies Corporation
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