Nickel-based alloy

Abstract

A nickel-based alloy contains 1.8 wt % to 2.2 wt % silicon, 0.05 wt % to 0.1 wt % yttrium and/or hafnium and/or zirconium, 2 wt % to 2.4 wt % aluminum and the remainder is nickel.

What is claimed is:  
     
         1 . A nickel-based alloy comprising: 
 1.8 wt % to 2.2 wt % silicon;    0.05 wt % to 0.1 wt % of at least one of yttrium, hafnium and zirconium;    2 wt % to 2.4 wt % aluminum; and    a remainder of nickel.    
     
     
         2 . The alloy according to  claim 1 , wherein a yttrium content is 0.06 wt %.  
     
     
         3 . The alloy according to  claim 1 , further comprising a carbon content of less than 0.05 wt %.  
     
     
         4 . The alloy according to  claim 1 , further comprising a maganese content of less than 0.01 wt %.  
     
     
         5 . The alloy according to  claim 1 , further comprising a sulfur content not exceeding 0.002 wt %.  
     
     
         6 . The alloy according to  claim 1 , further comprising a cobalt content not exceeding 5 wt %.  
     
     
         7 . The alloy according to  claim 1 , wherein a total alloy amount does not exceed 5 wt %.  
     
     
         8 . The alloy according to  claim 1 , wherein the alloy is used in a spark-plug electrode for an internal combustion engine.