Method for coating a sliding element and sliding element, in particular a piston ring

Abstract

The invention relates to a method wherein nanoparticle are first produced and then infused in the coating during the coating process by means of a PVD and/or CVD method. A sliding element comprises a coating formed by means of a PVD and/or CVD method comprising separately produced nanoparticles.

1 . A method for coating, comprising at least one layer and formed on at least one outer surface, a sliding element, wherein nanoparticles are initially produced, and then infused into the coating during the coating process, which is implemented by means of a PVD and/or a CVD method, the coating being formed containing a metal oxynitride. 
     
     
         2 . The method according to  claim 1 , wherein the coating is formed containing a metal nitride. 
     
     
         3 . The method according to  claim 1  wherein the coating is formed containing CrON. 
     
     
         4 . The method according to  claim 1 , wherein the nanoparticles comprise up to 20 volume % of the coating. 
     
     
         5 . The method according to  claim 1 , wherein the coating is formed such that the nanoparticles are 1 to 100 nm in size. 
     
     
         6 . The method according to  claim 1 , wherein the coating is formed such that the nanoparticles are chosen from the group of oxides, carbides and/or silicides, and one or more of the compounds comprise Me x O y , Me x C y  and Me x Si y  with Me: Cr, Ti, Ta, Si, In, Sn, Al, W, V, Mo and/or x=1 to 3 and/or Y=1 to 3. 
     
     
         7 . The method according to  claim 1 , wherein the coating is formed with a total thickness of up to about 100 μm. 
     
     
         8 . The method according to  claim 1 , wherein the coating is formed over cast iron or steel as the base material of the sliding element. 
     
     
         9 . A sliding element with a coating comprising at least one layer, formed by means of a PVD and/or a CVD method, on at least one outer surface, which has separately produced nanoparticles, wherein the coating contains a metal oxynitride. 
     
     
         10 . The sliding element according to  claim 9 , wherein the coating contains a metal nitride. 
     
     
         11 . The sliding element according to  claim 9 , wherein the coating contains CrON. 
     
     
         12 . The sliding element according to  claim 9 , wherein the nanoparticles comprise of up to 20 volume % of the coating. 
     
     
         13 . The sliding element according to  claim 9 , wherein the nanoparticles are    1  to  100   nm in size. 
     
     
         14 . The sliding element according to  claim 9 , wherein the nanoparticles are chosen from the group of oxides, carbides and/or silicides, and one or more of the compounds comprise Me x O y , Me x C y  and Me x Si y  with Me: Cr, Ti, Ta, Si, In, Sn, Al, W, V, Mo and/or x=1 to 3 and/or Y=1 to 3. 
     
     
         15 . The sliding element according to  claim 9 , wherein the whole thickness of the coating is up to about 100 μm. 
     
     
         16 . The sliding element according to  claim 9 , wherein the base material of the sliding element comprises cast iron or steel. 
     
     
         17 . The method of  claim 1 , wherein the sliding element is a piston ring. 
     
     
         18 . The method of  claim 2 , wherein the metal nitride is selected from at least one of CrN, AlN or TiN. 
     
     
         19 . The method of  claim 5 , wherein the nanoparticles are 5 to 75 nm in size. 
     
     
         20 . The method of  claim 5 , wherein the nanoparticles are 5 to 50 nm in size. 
     
     
         21 . The method of  claim 7 , wherein the total thickness is 5 to 50 μm. 
     
     
         22 . The sliding element of  claim 9 , comprising a piston ring. 
     
     
         23 . The sliding element of  claim 10 , wherein the metal nitride comprises at least one of CrN, AlN or TiN. 
     
     
         24 . The sliding element of  claim 13 , wherein the nanoparticles are 5 to 75 nm in size. 
     
     
         25 . The sliding element of  claim 13 , wherein the nanoparticles are 5 to 50 nm in size. 
     
     
         26 . The sliding element of  claim 15 , wherein the total thickness is 5 to 50 μm.