Oxide-forming protective coatings for niobium-based materials

Details Oxide-forming protective coatings for niobium-based materials Oxide-forming protective coatings for niobium-based materials

2011-07-19

2011-07-19

Austin, Aaron (Department: 1784)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C428S472000, C428S641000, C428S651000, C428S660000, C428S662000

Reexamination Certificate

active

07981520

ABSTRACT:
A coating suitable for use as protective oxide-forming coatings on Nb-based substrates, and particularly monolithic niobium-based alloys, exposed to high temperatures and oxidative environments. The coating contains aluminum, may further contain silicon, and optionally contains niobium, titanium, hafnium, and/or chromium, which in combination form one or more intermetallic phases that promote the formation of a slow-growing oxide scale. The intermetallic phases may be M(Al,Si)3, M5(Al,Si)3, and/or M3Si5Al2where M is niobium, titanium, hafnium, and/or chromium.

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