Patent ID: 6444057
Filing Date: 2002-09-03
Classification: C22C

Abstract:
An article comprising substantially a single crystal and having a composition, in weight percent, consisting essentially ofa modifying element selected from the group consisting of from about 0.25 to about 0.5 percent by weight zirconium, combinations of from about 0.2 to about 2.0 percent by weight hafnium and from about 0.25 to about 0.5 percent by weight zirconium, and combinations of from about 1.0 to about 2.0 percent by weight hafnium and from about 0.1 to about 0.5 percent by weight zirconium; and a base alloy composition of from about 4 to about 20 percent cobalt, from about 1 to about 10 percent chromium, from about 5 to about 7 percent aluminum, from 0 to about 2 percent molybdenum, from about 3 to about 8 percent tungsten, from about 4 to about 12 percent tantalum, from 0 to about 2 percent titanium, from 0 to about 8 percent rhenium, from 0 to about 6 percent ruthenium, from 0 to about 1 percent niobium, from 0 to about 0.1 percent carbon, from 0 to about 0.01 percent boron, from 0 to about 0.1 percent yttrium, balance nickel and incidental impurities.