Brake friction material with reinforcement material
AssigneeGoodyear Aerospace Corporation
InventorDoulatabad A. Venkatu
Life of this patent
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Abstract
A brake disk frictional module is provided, composed of sintered metallic material reinforced throughout its entire volume by a grid system of pure metal or metallic alloy. The friction module may be manufactured by sintering the metallic material with the grid reinforcement in either a mold or within the brake disk cup. The internal reinforcement of the frictional module prevents spalling weight loss, friction coefficient decay, or other physical defect as caused by frictional strain during use. The reinforcement material reduces the overall temperature of the disk during use, and aids frictional coefficient of the disk because of the metallic compatibility of the metallic material and grid system.
Claims24
A brake disk, comprising:
- (a) an annular disk;
- (b) a multiplicity of cups secured to said disk;
- and
- (c) a multiplicity of frictional modules, one said frictional module residing in each said cup;
- each said module comprising a grid of substantially copper-containing reinforcement material and a quantity of copper-containing sintered frictional material reinforced through said entire quantity by said grid, said grid and frictional material being separate and distinct elements of the module;
- said substantially copper-containing grid being compatible with said copper-containing sintered frictional material in coefficient of friction properties;
- said quantity of copper-containing sintered frictional material having outer surfaces sintered to said cup and both said friction material and said reinforcement grid having upper surfaces exposed from said annular disk cups, said grid being free of direct attachment to said cups.
A process for forming a high-coefficient brake disc surface, comprising:
- gathering copper-containing frictional material, a grid of substantially copper-containing reinforcement material compatible with said frictional material in coefficient of friction properties and an annular disk having cups;
- sintering said frictional material with said grid into a frictional module at temperature from about 845.degree. C. to about 890.degree. C., said grid reinforcing said frictional material throughout the entire volume of said frictional module;
- inserting said frictional module into said cup of said annular disk, said frictional module having a shape substantially equivalent to the shape of said cup;
- and,
- heating said frictional module and said annular disk at temperatures below the melting point of copper and from about 1000.degree. C. to about 1030.degree. C., wherein only said frictional material of said frictional module sinters with said cup of said annular disk with said grid remaining free of direct attachment to said cup.
Dependencies are inferred from the claim text.