High density, metal-based materials having low coefficients of friction and wear rates

Abstract

High theoretical density, metal-based materials containing graphite or hexagonal boron nitride have low coefficients of friction and wear rates are useful for bearings, bushings and other articles subject to bearing loads.

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         11 . A method for preparing a metal-based material comprising: 
 i. forming a mixture of a metal and a solid lubricant selected from the group consisting of hexagonal boron nitride, graphite and mixtures thereof; and    ii. isostatically processing the mixture to form the metal-based material having an actual density of at least 99 percent of the theoretical density of the mixture.    
     
     
         12 . A method for preparing a wear-resistant, shaped, metal-based material, subject to high bearing loads, comprising: 
 i. forming a uniform mixture of a metal and a solid lubricant selected from the group consisting of hexagonal boron nitride, graphite and mixtures thereof; and    ii. compacting the mixture to form a compact having an actual density of at least 99 percent of the theoretical density of the mixture.    
     
     
         13 . A method of  claim 12 , wherein the forming of a uniform mixture comprises mixing a powder of the metal with a powder of the solid lubricant.  
     
     
         14 . A method of  claim 12 , wherein the compacting comprises hot-compacting.  
     
     
         15 . A method of  claim 14 , wherein the hot-compacting comprises hot-isostatic pressing.  
     
     
         16 . A method of  claim 14 , wherein the compacting comprises extruding.  
     
     
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