78General Electric CompanyOuter coating of chromium and at least one of the elements iron, cobalt and nickel and an outer portion including aluminum and an element selected from hafnium, platinum, rhodium and palladiumUS4162918 *2 nov. 197731 juil. 1979General Electric CompanyRare earth metal doped directionally solidified eutectic alloy and superalloy materialsUS4248940 *30 juin 19773 f???vr. 198