US2007034048A1PendingUtilityA1

Hardmetal materials for high-temperature applications

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Assignee: LIU SHAIW-RONG SPriority: Jan 13, 2003Filed: Aug 21, 2006Published: Feb 15, 2007
Est. expiryJan 13, 2023(expired)· nominal 20-yr term from priority
Inventors:Shaiw-Rong Scott Liu
C22C 32/0047C22C 1/05C22C 29/005B22F 2998/10
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Claims

Abstract

Hardmetal compositions each including hard particles having a first material and a binder matrix having a second, different material comprising rhenium or a Ni-based superalloy. Tungsten may also be used a binder matrix material. A two-step sintering process may be used to fabricate such hardmetals at relatively low sintering temperatures in the solid-state phase to produce substantially fully-densified hardmetals. A hardmetal coating or structure may be formed on a surface by using a thermal spray method.

Claims

exact text as granted — not AI-modified
1 . A material, comprising: 
 hard particles comprising at least one carbide selected from at least one of TaC, HfC, NbC, ZrC, TiC, WC, VC, Al 4 C 3 , ThC 2 , MO 2 C, SiC and B 4 C; and    a binder matrix that binds the hard particles and comprises rhenium.    
     
     
         2 . A material as in  claim 1 , wherein the hard particles are less than 75% of a total weight of the material and rhenium is greater than 25% of the total weight of the material.  
     
     
         3 . A material as in  claim 1 , wherein the hard particles further comprise at least one nitride selected from at least one of HfN, TaN, BN, ZrN, and TiN.  
     
     
         4 . A material as in  claim 1 , wherein the hard particles further comprise at least one boride selected from at least one of HfB 2 , ZrB 2 , TaB 2 , TiB 2 , NbB 2 , and WB.  
     
     
         5 . A material as in  claim 1 , wherein the binder matrix further comprises W or Ta.  
     
     
         6 . A material as in  claim 2 , wherein the binder matrix further comprises W or Ta.  
     
     
         7 . A material as in  claim 3 , wherein the binder matrix further comprises W or Ta.  
     
     
         8 . A material as in  claim 4 , wherein the binder matrix further comprises W or Ta.  
     
     
         9 . A material, comprising: 
 hard particles comprising at least one nitride selected from at least one of HfN, TaN, BN, ZrN, and TiN; and    a binder matrix that binds the hard particles and comprises rhenium.    
     
     
         10 . A material as in  claim 9 , wherein the hard particles are less than 75% of a total weight of the material and rhenium is greater than 25% of the total weight of the material.  
     
     
         11 . A material as in  claim 9 , wherein the hard particles further comprise at least one carbide selected from at least one of TaC, HfC, NbC, ZrC, TiC, WC, VC, Al 4 C 3 , ThC 2 , Mo 2 C, SiC and B 4 C.  
     
     
         12 . A material as in  claim 9 , wherein the hard particles further comprise at least one boride selected from at least one of HfB 2 , ZrB 2 , TaB 2 , TiB 2 , NbB 2 , and WB.  
     
     
         13 . A material as in  claim 9 , wherein the binder matrix further comprises W or Ta.  
     
     
         14 . A material as in  claim 10 , wherein the binder matrix further comprises W or Ta.  
     
     
         15 . A material as in  claim 11 , wherein the binder matrix further comprises W or Ta.  
     
     
         16 . A material as in  claim 12 , wherein the binder matrix further comprises W or Ta.  
     
     
         17 . A material, comprising: 
 hard particles comprising at least one boride selected from at least one of HfB 2 , ZrB 2 , TaB 2 , TiB 2 , NbB 2 , and WB; and    a binder matrix that binds the hard particles and comprises rhenium.    
     
     
         18 . A material as in  claim 17 , wherein the hard particles are less than 75% of a total weight of the material and rhenium is greater than 25% of the total weight of the material.  
     
     
         19 . A material as in  claim 17 , wherein the hard particles further comprise at least one nitride selected from at least one of HfN, TaN, BN, ZrN, and TiN.  
     
     
         20 . A material as in  claim 17 , wherein the hard particles further comprise at least one carbide selected from at least one of TaC, HfC, NbC, ZrC, TiC, WC, VC, Al 4 C 3 , ThC 2 , MO 2 C, SiC and B 4 C.  
     
     
         21 . A material as in  claim 17 , wherein the binder matrix further comprises W or Ta.  
     
     
         22 . A material as in  claim 18 , wherein the binder matrix further comprises W or Ta.  
     
     
         23 . A material as in  claim 19 , wherein the binder matrix further comprises W or Ta.  
     
     
         24 . A material as in  claim 20 , wherein the binder matrix further comprises W or Ta.

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