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US 10,330,138 B2Granted
Coated metal article
AssigneeHamilton Sundstrand Corporation
InventorsLei Chen, Blair A. Smith
Life of this patent
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Abstract
An article is disclosed that includes a first substrate of a first metal or metal alloy. An aluminum alloy first layer on a surface of the first substrate includes is galvanically less noble than the first metal or metal alloy. The first layer can also include elements alloyed with or in solid solution with the aluminum alloy, or can include a two or more phase composition including a first phase of aluminum and a second phase of a solid lubricant.
Claims18
An article, comprising
- a first substrate comprising a first metal or metal alloy;
- and
- a first layer on a surface of the first substrate, said first layer comprising an aluminum alloy that is galvanically less noble than the first metal or metal alloy, with the proviso that:
- (1) the aluminum alloy has a higher galvanic kinetic activity than pure aluminum, and comprises an element selected from tungsten, silver, antimony, bismuth, gold, gallium, or indium, alloyed or in solid solution with aluminum that increases the galvanic kinetic activity of the aluminum alloy compared to that of pure aluminum;
- (2) the aluminum alloy has a higher galvanic kinetic activity than pure aluminum, and comprises an element alloyed or in solid solution with aluminum that increases the galvanic kinetic activity of the aluminum alloy compared to that of pure aluminum and is present in an amount in excess of a thermodynamic equilibrium limit for formation of an aluminum alloy or solid solution;
- or
- (3) the first layer comprises a two or more phase composition comprising a first phase comprising the aluminum alloy, and a second phase comprising a self-lubricating solid lubricant selected from PTFE, MoS2, WS2, TiN, TiC, Pb, PbO, ZnO, Sb2O3, BN, graphite, diamond-like carbon, or combinations comprising any of the foregoing.
4 more elements
Dependencies are inferred from the claim text.