Composition for sliding member and sliding member coated with the composition

Abstract

An object of the invention is to provide a composition for a sliding member capable of forming a lubricating film which does not occur large cracks in the lubricating film formed even if the formed lubricating film is pressed and slid, large peeling off of the lubricating film is restrained from occurring, and improved in abrasion resistance. The invention provides the composition for the sliding member containing a base resin and nano metal particles softer than the counterpart material of sliding, wherein the content of the soft nano metal particles is 5 vol % or less.

1 . A composition for a sliding member comprising:
 a base resin; and   metal nano-particles,   wherein the metal nano particles are softer than a counterpart member to be slid on the sliding member, and   wherein a content of the soft metal nano particles is 5 vol % or less.   
     
     
         2 . The composition for the sliding member as set forth in  claim 1 ,
 wherein the soft metal nano particles are at least one substance selected from the group consisting of single metal, oxide and sulfide of Cu, Ag, Bi, Al, Sn, Pb, In, Mg, Zn, Au and Sb, the group excepting Al oxide and sulfides of Bi, Al, Sn and In.   
     
     
         3 . The composition for the sliding member as set forth in  claim 1 ,
 wherein an average particle size of the soft metal nano particles is from 0.1 to 100 nm.   
     
     
         4 . (canceled) 
     
     
         5 . (canceled) 
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
         8 . The composition for the sliding member as set forth in  claim 2 ,
 wherein an average particle size of the soft metal nano particles is from 0.1 to 100 nm.   
     
     
         9 . The composition for the sliding member as set forth in  claim 1 , further comprising solid lubricant,
 wherein a content of the solid lubricant is from 20 to 80 vol %.   
     
     
         10 . The composition for the sliding member as set forth in  claim 2 , further comprising solid lubricant,
 wherein a content of the solid lubricant is from 20 to 80 vol %.   
     
     
         11 . The composition for the sliding member as set forth in  claim 3 , further comprising solid lubricant,
 wherein a content of the solid lubricant is from 20 to 80 vol %.   
     
     
         12 . The composition for the sliding member as set forth in  claim 11 ,
 wherein the content of the solid lubricant is from 20 to 70 vol %.   
     
     
         13 . The composition for the sliding member as set forth in  claim 12 ,
 wherein the content of the solid lubricant is from 20 to 50 vol %.   
     
     
         14 . A sliding member comprising a base member coated with the composition for the sliding member as set forth in  claim 1 . 
     
     
         15 . A sliding member comprising a base member coated with the composition for the sliding member as set forth in  claim 2 . 
     
     
         16 . A sliding member comprising a base member coated with the composition for the sliding member as set forth in  claim 3 .