Coating processes – Applying superposed diverse coating or coating a coated base – Metallic compound-containing coating
Patent
1995-11-13
1998-04-07
Bell, Janyce
Coating processes
Applying superposed diverse coating or coating a coated base
Metallic compound-containing coating
427140, 427142, 4274192, 4274193, B05D 136
Patent
active
057361983
ABSTRACT:
The surface of a member formed of at least one kind of ceramics, metals and C/C composites, is covered with an outermost surface oxide covering layer having a stability against the environment in the atmospheric air at 1500.degree. C.; and a self-recoverable layer as an intermediate layer formed between the outermost surface oxide covering layer and the surface of the member. The self-recoverable layer has an oxidizing rate greater than that of the outermost surface covering layer for recovering cracks generated on the outermost surface covering layer, and a compound produced by the self-recoverable layer has the same phase as in the outermost surface covering layer. To achieve the optimum self-recovering function at high temperatures, the outermost surface oxide covering layer may be made of a stable oxide having a vapor pressure of 1.times.10.sup.-4 /m.sup.2 or less in the atmospheric air at 1500.degree. C., and the oxidized product material from the self-recoverable layer contains an oxide having the same composition as that of the outermost surface oxide covering layer.
REFERENCES:
patent: 4399168 (1983-08-01), Kullander et al.
patent: 5035923 (1991-07-01), Sarin
patent: 5290354 (1994-03-01), Haluska
patent: 5338577 (1994-08-01), Burdette
Kikuchi Shigeru
Miyata Motoyuki
Nakagawa Mitsuo
Saito Yukio
Yasutomi Yoshiyuki
Bell Janyce
Hitachi , Ltd.
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