Superalloy for high-temperature hydrogen environmental applicati

Details Superalloy for high-temperature hydrogen environmental applicati Superalloy for high-temperature hydrogen environmental applicati

1989-10-24

1991-06-11

Dean, R.

Alloys or metallic compositions

Nickel base

Chromium containing

148410, 148428, C22C 1905, C22F 110

Patent

active

050230506

ABSTRACT:
A nickel-based superalloy is provided which is resistant to deterioration in hydrogen at high operating temperatures and pressures, and which thus can be used in hydrogen-fueled spacecraft such as the Space Shuttle. The superalloy is characterized by a two-phase microstructure and consists of a gamma-prime precipitated phase in a gamma matrix. The gamma matrix phase is a primary solid solution and the gamma precipitated phase will be an intermetallic compound of the type A.sub.3 B, such as nickel aluminide or titanide. Both phases are coherent, ordered, and compatible, and thus will retain most of their strength at elevated temperatures. The alloy consists essentially of (by weight):

REFERENCES:
patent: 4769087 (1988-09-01), Genereux et al.
patent: 4853044 (1989-08-01), Ford et al.

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