Thermal barrier coating

Details Thermal barrier coating Thermal barrier coating

1987-03-05

1988-09-27

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of inorganic material

73 7, 116200, 116208, 415118, 415174, 416241B, 427157, 4274193, 428633, 428699, 428701, 428702, B32B 900, F01D 2500

Patent

active

047741503

ABSTRACT:
According to the present invention there is provided a thermal barrier coating wherein multilayers of (I) a ZrO.sub.2 layer containing a luminous activator and stabilized by Y.sub.2 O.sub.3, CaO, MgO or a mixture thereof and (II) a ZrO.sub.2 layer containing a luminous activator different from that used in (I) and stabilized by Y.sub.2 O.sub.3, CaO, MgO or a mixture thereof, or a ZrO.sub.2 layer not containing a luminous activator and stablized by Y.sub.2 O.sub.3 are stacked, and the layers at least under an uppermost layer opposite to a base member to be protected have a total thickness sufficient for exhibiting a thermal barrier effect. The present invention has as its object to provide a thermal barrier coating which allows non-destructive testing to determine whether it has a thickness sufficient for themal barrier effect.

REFERENCES:
patent: 2976716 (1961-03-01), De Haven
patent: 4269903 (1981-05-01), Clingman et al.
patent: 4441049 (1984-04-01), Verstegen et al.
patent: 4473513 (1984-09-01), Cusano et al.
patent: 4532938 (1985-08-01), Sippel
patent: 4563297 (1986-01-01), Kokimoto et al.
patent: 4600659 (1986-07-01), Hong et al.

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