Abstract Unidirectionally solidified nickel-base carbide-reinforced cast superalloy bodies having high strength and exceptionally high stress-rupture properties, particularly at elevated temperatures. The reinforcing fibers present in the matrix comprise aligned fibers of single-crystal monocarbide essentially of tantalum. A preferred composition contains the nominal (melt) percentages: 6.7 w/o chromium, 18.25 w/o total tantalum, 1.1 w/o carbon, 5.0 w/o aluminum, 0.84 w/o titanium, 8.4 w/o cobalt and 5.0 w/o molybdenum, balance essentially nickel. The resulting article, after trimming, has the approximate composition: 7.9 w/o chromium, 7.0 w/o tantalum, 0.24 w/o carbon, 6.0 w/o aluminum, 0.38 w/o titanium, 9.6 w/o cobalt, 4.9 w/o molybdenum, balance essentially nickel.
Inventors
👤 J Walter
👤 H Cline
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-31 20:58
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
An article according to claim 1, said casting being characterized by having high strength and resistance to creep and a chemistry which consists essentially of a nickel-base alloy containing at least a portion of said tantalum and carbon in the form of about 15 to 20 weight percent monocarbide of tantalum.
Claim 2
Dependent Claim
32 words
An article according to claim 1, a major portion of said tantalum being present as a monocarbide of tantalum comprising fibers forming from about 2 to 10 volume percent of the alloy.
Claim 3
Dependent Claim
33 words
An article according to claim 1, a minor proportion of the tantalum being present as a solid solution in the matrix of the alloy in addition to said tantalum present as TaC fibers.
Claim 4
Dependent Claim
31 words
An article according to claim 1, said carbide of tantalum consisting essentially of tantalum monocarbide and comprising aligned fibers in the form of single crystals of tantalum carbide of cubic form.