Multi-principal element alloy filler materials

Abstract

An example MPEA filler includes manganese at about 10 atomic percent to about 60 atomic percent, iron at about 0 atomic percent to about 35 atomic percent, cobalt at about 0 atomic percent to about 35 atomic percent, nickel at about 0 atomic percent to about 35 atomic percent, and copper at about 0 atomic percent to about 35 atomic percent.

What is claimed is: 
     
         1 . A multi-principal element alloy (“MPEA”) filler material, comprising:
 manganese at about 10 atomic percent to about 60 atomic percent of the MPEA filler material; 
 iron at 0 atomic percent to about 3 atomic percent of the MPEA filler material; 
 cobalt at greater than 0 atomic percent to about 35 atomic percent of the MPEA filler material; 
 nickel at greater than 0 atomic percent to about 35 atomic percent of the MPEA filler material; and 
 copper at greater than 0 atomic percent to about 35 atomic percent of the MPEA filler material. 
 
     
     
         2 . The MPEA filler material of  claim 1 , wherein the manganese at about 40 atomic percent to about 50 atomic percent of the MPEA filler material. 
     
     
         3 . The MPEA filler material of  claim 1 , wherein the cobalt at about 15 atomic percent to about 19 atomic percent of the MPEA filler material. 
     
     
         4 . The MPEA filler material of  claim 1 , wherein the nickel at about 15 atomic percent to about 19 atomic percent of the MPEA filler material. 
     
     
         5 . The MPEA filler material of  claim 1 , wherein the copper at about 13 atomic percent to about 18 atomic percent of the MPEA filler material. 
     
     
         6 . The MPEA filler material of  claim 1 , further comprising aluminum at about 1 atomic percent to about 5 atomic percent of the MPEA filler material. 
     
     
         7 . The MPEA filler material of  claim 1 , further comprising titanium at about 0.5 atomic percent to about 5 atomic percent of the MPEA filler material. 
     
     
         8 . The MPEA filler material of  claim 1 , wherein the MPEA filler material is substantially free of silicon. 
     
     
         9 . The MPEA filler material of  claim 1 , wherein the MPEA filler material is substantially free of boron. 
     
     
         10 . The MPEA filler material of  claim 1 , wherein the MPEA filler material exhibits a single phase face-centered cubic structure. 
     
     
         11 . The MPEA filler material of  claim 1 , wherein the MPEA filler material exhibits dendritic structures and interdendritic structures. 
     
     
         12 . The MPEA filler material of  claim 11 , wherein the dendritic structures include more iron and cobalt than the interdendritic structures and the interdendritic structures include more manganese and copper than the dendritic structures. 
     
     
         13 . A braze joint, comprising:
 a first substrate at least partially defining a gap;   the MPEA filler material of  claim 1  at least one of disposed in at least a portion of the gap or at least partially diffused into the first substrate.   
     
     
         14 . The braze joint of  claim 13 , wherein the MPEA filler material is at least partially diffused into the first substrate. 
     
     
         15 . The braze joint of  claim 13 , wherein the MPEA filler material is a compressed filler. 
     
     
         16 . The braze joint of  claim 13 , wherein the MPEA filler material is a fixed-gap-width filler. 
     
     
         17 . A multi-principal component alloy (“MPEA”) filler material, comprising:
 manganese at about 10 atomic percent to about 60 atomic percent of the MPEA filler material; 
 iron at greater than 0 atomic percent to about 35 atomic percent of the MPEA filler material; 
 cobalt at greater than 0 atomic percent to about 19 atomic percent of the MPEA filler material; 
 nickel at greater than 0 atomic percent to about 35 atomic percent of the MPEA filler material; and 
 copper at greater than 0 atomic percent to about 35 atomic percent of the MPEA filler material. 
 
     
     
         18 . A braze joint, comprising:
 a first substrate at least partially defining a gap;   the MPEA filler material of  claim 17  at least one of disposed in at least a portion of the gap or at least partially diffused into the first substrate.   
     
     
         19 . A method of determining materials for a multi-principal component alloy (“MPEA”) filler material, the method comprising:
 using a parameter-based filtration series modelled to screen a plurality of distinct MPEA systems and selecting the MPEA systems which fit one or more desired parametric requirements; 
 screening compositions within a particular selected MPEA system and selecting one or more compositions that are predicted to display desirable solidification behavior for brazing, wherein the desirable attributes of the solidification behavior include at least one of a selected melting point or a selected solidification temperature range; and 
 predicting interactions between the MPEA filler material and a substrate for at least some of the selected compositions through construction of isopleth phase diagrams.