Highly heat dissipative and abrasion resistant brake disk for bicycles

Abstract

The present invention provides a highly heat dissipative and abrasion resistant bicycle brake disk. The brake disk is of a metal-based composite material, wherein the metal-based composite material includes a metal-containing material and 5% to 40% by volume of ceramic particles.

What is claimed is:  
     
         1 . A bicycle brake disk of a metal-based composite material, wherein the metal-based composite material includes a metal-containing material and 5% to 40% by volume of ceramic particles.  
     
     
         2 . The brake disk as claimed in  claim 1 , wherein the ceramic particles are particles of a material selected from the group consisting of Sic, Al 2 O 3 , TiB, and B 4 C.  
     
     
         3 . The brake disk as claimed in  claim 2 , wherein the ceramic particles are SiC particles or Al 2 O 3  particles.  
     
     
         4 . The brake disk as claimed in  claim 3 , wherein the ceramic particles are SiC particles.  
     
     
         5 . The brake disk as claimed in  claim 1 , wherein the ceramic particles have a particle size of 5 to 100 μm.  
     
     
         6 . The brake disk as claimed in  claim 1 , wherein the metal-containing material has a specific gravity of 1.7 to 4.6 g/cm 3 .  
     
     
         7 . The brake disk as claimed in  claim 1 , wherein the metal-containing material is selected from the group consisting of aluminium, aluminium alloy, magnesium, magnesium alloy, titanium, and titanium alloy.  
     
     
         8 . The brake disk as claimed in  claim 7 , wherein the metal-containing material is aluminum.  
     
     
         9 . The brake disk as claimed in  claim 7 , wherein the metal-containing material is aluminum alloy.  
     
     
         10 . The brake disk as claimed in  claim 9 , wherein the aluminum alloy is selected from the group consisting of AlSi, AlSiCu, AlSiZn, AlSiMg, AlSiCuZn, AlZn, AlZnMg, AlGe, AlGeSi, AlCu, AlMn, AlMg, AlLi, AlSn, and AlPb.  
     
     
         11 . The brake disk as claimed in  claim 10 , wherein the aluminum alloy is AlMgSi.