Brake or clutch components having a ceramic-metal composite...

F - Mech Eng,Light,Heat,Weapons – 16 – D

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F16D 69/02 (2006.01) C04B 37/02 (2006.01)

Patent

CA 2289077

A braking component such as a brake pad, brake rotor, brake drum or clutch disk is comprised of a metal substrate having a friction material laminated on at least a portion of at least one face of the metal substrate, the friction material being a ceramic-metal composite comprised of a metal phase and a ceramic phase dispersed within each other, wherein the ceramic phase is present in an amount of at least about 20 percent by volume of the ceramic- metal composite. In particular, the braking component is a metal substrate, such as aluminum, having laminated thereto a ceramic-metal composite of a dense boron carbide-aluminum composite having high specific heat and low density.

La présente invention concerne un composant de freinage tel qu'une plaquette de frein, un disque de frein, un tambour de frein ou un disque d'embrayage comprenant un substrat métallique. Un matériau de friction est superposé sur au moins une partie d'au moins une face du substrat métallique, lequel matériau de friction est un cermet composé d'une phase métallique et d'une phase céramique dispersées l'une dans l'autre, la phase céramique étant présente dans une quantité égale à au moins 20 pour-cent en volume du cermet. En particulier, le composant de freinage est composé d'un substrat métallique tel que de l'aluminium sur lequel a été superposé un cermet de composite de carbure de bore-aluminium dense possédant une chaleur massique élevée et une faible densité.

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