Wear reduction in fdb by enhancing lubricants with nanoparticles

Abstract

An embodiment of the invention relates to a spindle motor of a magnetic recording storage device, the spindle motor comprising a fluid dynamic bearing comprising a lubricant comprising at least one of an organic and inorganic nanomaterial.

1 . A spindle motor of a magnetic recording storage device, the spindle motor comprising a fluid dynamic bearing comprising a lubricant comprising at least one of an organic and inorganic nanomaterial. 
     
     
         2 . The spindle motor of magnetic recording storage device of  claim 1 , wherein the lubricant has a single phase composition. 
     
     
         3 . The spindle motor of magnetic recording storage device of  claim 1 , wherein the lubricant comprises a mineral base hydro carbon, synthetic hydrocarbon containing compound, or combinations thereof. 
     
     
         4 . The spindle motor of magnetic storage device of  claim 1 , wherein the lubricant comprises about 0.01 to about 5.0 percent by weight of the organic or inorganic nanomaterial. 
     
     
         5 . The spindle motor of magnetic storage device of  claim 1 , wherein the lubricant comprises about 0.02 to about 2.0 percent by weight of the organic or inorganic nanomaterial. 
     
     
         6 . The spindle motor of magnetic storage device of  claim 1 , wherein the lubricant comprises about 0.05 to about 1.0 percent by weight of the organic or inorganic nanomaterial. 
     
     
         7 . A spindle motor of a magnetic recording storage device of  claim 1 , wherein the lubricant comprises di-2-ethyl hexyl suberate. 
     
     
         8 . The spindle motor of magnetic recording storage device of  claim 1 , wherein the lubricant comprises an ester selected from the group consisting of diester, monoester, simple ester, compound ester and combinations thereof. 
     
     
         9 . The spindle motor of magnetic recording storage device of  claim 8 , wherein the lubricant comprises an additive. 
     
     
         10 . The spindle motor of magnetic recording storage device of  claim 1 , wherein the lubricant comprises di-2-ethyl hexyl pimelate. 
     
     
         11 . The spindle motor of magnetic recording storage device of  claim 1 , wherein the organic nanomaterial comprises carbon nano tubes, onions, or combinations thereof. 
     
     
         12 . The spindle motor of magnetic recording storage device of  claim 11 , wherein the onions are Ni/Y based single wall carbon nano tubes, Fe-based multiwall carbon nano tubes, metal free multiwall nano tubes, or combinations thereof. 
     
     
         13 . The spindle motor of magnetic recording storage device of  claim 1 , wherein the inorganic nanomaterial comprises inorganic fullerene (IF) comprising IF-MoS 2 , IF-WS 2 , IF-NbS 2  or combinations thereof. 
     
     
         14 . A lubricant comprising (a) an organic or inorganic nanomaterial and (b) a mineral base hydro carbon, synthetic hydrocarbon containing compound, or combinations thereof. 
     
     
         15 . The lubricant of  claim 14 , wherein the lubricant comprises 0.01 to 5.0 percent by weight of the organic or inorganic nanomaterial. 
     
     
         16 . The lubricant of  claim 14 , wherein the inorganic nanomaterial comprises carbon nano tubes, onions, or combinations thereof. 
     
     
         17 . The lubricant of  claim 14 , wherein the onions are Ni/Y based single wall carbon nano tubes, Fe-based multiwall carbon nano tubes, metal free multiwall nano tubes, or combinations thereof. 
     
     
         18 . The lubricant of  claim 14 , wherein the inorganic nanomaterial comprises IF-MoS 2 , IF-WS 2 , IF-NbS 2  or combinations thereof. 
     
     
         19 . A spindle motor of a magnetic recording storage device, the spindle motor comprising a fluid dynamic bearing comprising a lubricant comprising an organic liquid and an inorganic nanomaterial, wherein the inorganic nanomaterial and the organic liquid form a suspension such that the inorganic nanomaterial does not settle out from the suspension. 
     
     
         20 . The spindle motor of magnetic recording storage device of  claim 19 , wherein the inorganic nanomaterial comprises IF-MoS 2 , IF-WS 2 , IF-NbS 2  or combinations thereof.