Metallic Bondcoat or Alloy with a High y/y' Transition Temperature and a Component

Abstract

A nickel-based coating or alloy is provided. The coating includes tantalum preferably without rhenium. The coating or alloy has stabilized the formation of phases γ/γ′ at high temperatures leading to a reduction of local stresses. A component is also provided. The substrate of the component includes a nickel-based or cobalt-based superalloy.

1 .- 15 . (canceled) 
     
     
         16 . A nickel-based metallic coating or alloy, comprising:
 the γ and γ′ phases,   wherein the coating or alloy comprises tantalum in a range of between 4 wt % to 7.5 wt %.   
     
     
         17 . The nickel-based coating or alloy according to  claim 16 , wherein the tantalum is in the range of between 5 wt % and 6.8 wt %. 
     
     
         18 . The nickel-based coating or alloy according to  claim 17 , wherein the tantalum is 6 wt %. 
     
     
         19 . The nickel-based metallic coating or alloy according to  claim 16 , wherein the metallic coating or alloy contains no yttrium and/or no platinum and/or no melting depressant. 
     
     
         20 . The nickel-based metallic coating or alloy according to  claim 16 , wherein an amount of cobalt is in a range between 11 wt %-14.5 wt %. 
     
     
         21 . The nickel-based metallic coating or alloy according to  claim 20 , wherein the amount of cobalt is in the range between 12 wt %-14 wt %. 
     
     
         22 . The nickel-based metallic coating or alloy according to  claim 21 , wherein the amount of cobalt is 13 wt %. 
     
     
         23 . The nickel-based metallic coating or alloy according to  claim 16 , wherein an amount of chromium is between 14 wt %-16 wt %. 
     
     
         24 . The nickel-based metallic coating or alloy according to  claim 16 , wherein an amount of aluminum is between 9 wt %-13 wt %. 
     
     
         25 . The nickel-based metallic coating or alloy according to  claim 16 , wherein an amount of yttrium is between 0.1 wt %-0.7 wt %. 
     
     
         26 . The nickel-based metallic coating or alloy according to  claim 16 , wherein the metallic coating or alloy comprises no rhenium. 
     
     
         27 . The nickel-based metallic coating or alloy according to  claim 16 , wherein the metallic coating or alloy comprises 0.1 wt % to 2 wt % rhenium. 
     
     
         28 . The nickel-based metallic coating or alloy according to  claim 16 , wherein the coating or the alloy is a MCrAlY alloy with M=nickel and/or M=cobalt. 
     
     
         29 . The nickel-based metallic coating or alloy according to  claim 16 , wherein the coating or alloy includes a higher γ′/γ transition compared to an NiCoCrAlY alloy or a coating with rhenium and without tantalum. 
     
     
         30 . The nickel-based metallic coating or alloy as claimed in  claim 16 , wherein the coating or alloy comprises no silicon, and/or no hafnium, and/or no zirconium, and/or no tungsten. 
     
     
         31 . The nickel-based metallic coating or alloy according to  claim 16 , wherein the coating or alloy comprises the β-phase. 
     
     
         32 . The nickel-based metallic coating or alloy as claimed in  claim 16 , wherein the coating or alloy consists of nickel, cobalt, aluminum, chromium, and tantalum. 
     
     
         33 . The nickel-based metallic coating or alloy as claimed in  claim 32 , wherein the coating or alloy further consists of yttrium. 
     
     
         34 . The nickel-based metallic coating or alloy according to  claim 16 , wherein the coating or alloy comprises no iron. 
     
     
         35 . A component, comprising:
 a nickel-based coating, comprising:
 the γ and γ′ phases, 
   
       wherein the coating or the alloy comprises tantalum in a range of between 4 wt % to 7.5 wt %