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US 9,581,211 B2Granted
Friction material and methods of making and using the same
AssigneeGM Global Technology Operations LLC
InventorsMichael L. Holly, David B. Antanaitis, Richard A. Kaatz, Mark T. Riefe, Cara L. Learman
Life of this patent
Estimating the term…
Abstract
One variation includes a friction material and method of manufacture thereof wherein the friction material includes a transfer layer on a ferritically nitrocarburized component, wherein the transfer layer may be fabricated from glass, rubber, carbon, aramid fiber, filler material, abrasive, or a high-temperature resin.
Claims9
A product comprising:
- a rotational member wherein the rotational member is ferritically nitrocarburized to provide a compound zone comprising an iron nitride layer and an overlying porous oxide layer, the rotational member comprising a friction surface configured for braking engagement with a corresponding friction material;
- and the rotational member further comprising a transfer layer disposed on the porous oxide layer so that the rotational member has a higher apparent coefficient of friction than a rotational member without the transfer layer on the porous oxide layer, wherein the transfer layer comprises at least one of glass, rubber, carbon, aramid fiber, filler material, abrasive, or high-temperature resin.
A product comprising:
- a rotational member wherein the rotational member is ferritically nitrocarburized, the rotational member comprising a friction surface configured for braking engagement with a corresponding friction material;
- and the rotational member further comprising a transfer layer disposed at the friction surface so that the rotational member has a higher apparent coefficient of friction than a rotational member without the transfer layer, and wherein the transfer layer comprises at least one of polyimides, bezoxazines, bismaleimides, phenols, or cyanate esters.
A product comprising:
- a rotational member wherein the rotational member is ferritically nitrocarburized, the rotational member comprising a friction surface configured for braking engagement with a corresponding friction material;
- and the rotational member further comprising a transfer layer disposed at the friction surface so that the rotational member has a higher apparent coefficient of friction than a rotational member without the transfer layer, and wherein the transfer layer comprises at least one of a barite, a lime, a metal sulfide, steel wool, or potassium titanate.
A product comprising:
- a rotational member wherein the rotational member is ferritically nitrocarburized, the rotational member comprising a friction surface configured for braking engagement with a corresponding friction material;
- and the rotational member further comprising a transfer layer disposed at the friction surface so that the rotational member has a higher apparent coefficient of friction than a rotational member without the transfer layer, and wherein the transfer layer comprises at least one of brass chips, or bituminous coal.
Dependencies are inferred from the claim text.