A brake disc used for brake systems of motor vehicles, rail vehicles and aircrafts and the brake disc includes a brake disc body, wherein the brake disc body is an aluminum alloy brake disc body, the two working surfaces of the aluminum alloy brake disc body are respectively attached with a wear-resistant layer, the wear-resistant layers are wear-resistant layers made of ceramic high-temperature resistant metal matrix composite (MMC) reinforced materials, and the wear-resistant layers made of ceramic high-temperature resistant MMC reinforced materials metallurgically bond with the aluminum alloy brake disc body through a squeeze casting technique.

A friction material includes a friction-generating layer, a core layer, and a third layer. The friction-generating layer presents a friction-generating surface and includes a friction-generating material. The friction-generating material includes friction-adjusting particles. The core layer is adjacent to the friction-generating layer and includes a core material. The core material includes core fibers. The third layer is adjacent to the core layer such that the core layer is disposed between the friction-generating and third layers. The third layer presents a multi-functional surface facing opposite the friction-generating surface of the friction-generating layer. The third layer includes a multi-functional material. The multi-functional material includes: multi-functional; and/or woven fibers chosen from aramid fibers, carbon fibers, cellulose fibers, acrylic fibers, polyvinyl alcohol fibers, glass fibers, mineral fibers, and combinations thereof. A resin is present in at least one of the friction-generating layer, the core layer, and the third layer.

A friction material includes a friction-generating layer, a core layer, and a base layer. The friction-generating layer presents a friction-generating surface and includes a friction-generating material. The friction-generating material includes friction-adjusting particles. The core layer is adjacent to the friction-generating layer and includes a core material. The core material includes core fibers. The base layer is adjacent to the core layer such that the core layer is disposed between the friction-generating and base layers. The base layer presents a bonding surface facing opposite the friction-generating surface of the friction-generating layer. The base layer includes a fibrous material. The fibrous material includes base fibers chosen from aramid fibers, carbon fibers, cellulose fibers, acrylic fibers, polyvinyl alcohol fibers, glass fibers, mineral fibers, and combinations thereof. A resin is present in at least one of the friction-generating layer, the core layer, and the base layer.

A clutch system includes a first clutch member and a second clutch member for transmitting torque from a vehicle power generator. The first clutch member includes a first a first clutch element having a first surface and a first friction material disposed on said first surface. The second clutch member is configured to engage the first clutch plate and includes a second clutch element having a second surface and a second friction material disposed on the second surface. The first friction material is configured to be engaged with the second friction material during operation of the vehicle power generator.

A method for making a brake disc may include providing a disc brake with a braking band and depositing on the disc a layer of chromium carbide and nickel-chromium in particle form to form a base protective coating. The method may also include depositing on the base protective coating a material in particle form consisting of tungsten carbide, iron, chromium and aluminium to form a surface protective coating made of tungsten carbide, iron, chromium and aluminium. Both protective coatings may be made by High Velocity Oxygen Fuel or High Velocity Air Fuel or Kinetic Metallization techniques.

A method for forming a friction material. The method includes mixing a fibrous base material and filler particles to form a substrate. The method further includes saturating the substrate with a silane solution including a silane to form a uniformly impregnated silane matrix. The method also includes curing the uniformly impregnated silane matrix to form a cured uniformly impregnated silane matrix. The method also includes saturating the cured uniformly impregnated silane matrix with a phenolic resin solution to form a uniformly impregnated silane, phenolic resin matrix. The method also includes curing the uniformly impregnated silane, phenolic resin matrix to form the friction material.

A friction material comprises an Fe part which contains Fe as a main component, a coating layer formed on a surface of the Fe part, and a friction part formed on a surface of at least a part of the coating layer, and the coating layer comprises a first coating layer and a second coating layer which have a specific average thickness and a specific component in order from Fe part side, and in the second coating layer, in order of positions at which the thickness is 20%, 40%, 60% and 80% of the second coating layer from the side of the first coating layer to the side opposite thereto, a Cu content increases and a Ni content decreases.

An etched logo is provided at a location within the layers. This etched section is viewable to the user on the working surface as a form of insignia (logo, trademark, letters, words, serial numbers, designs, patters, artwork, and the like) and does not wear off in normal use because of the coating layers and. Alternatively, the etching (or other slight indentation) may penetrate the 26 while still being viewable in the finished product to display the insignia. Even further, the etching may extend through the coating layers and the substrate. In this particular embodiment, the substrate includes a surface texture (also a form of insignia) viewable to a person in the finished product.

A wet running friction lining includes a plastic matrix, which contains at least one filler. The wet running friction lining contains bentonite as a filler.

An elastic adjustable brake pad for use in a train, comprising a brake pad frame (1) provided with a fourth through hole (18), a brake block assembly, and a spiral compression spring (6); the brake block assembly comprises a brake block (16), a rivet (4), a Belleville spring (5), and a rivet sleeve (3), the brake block (16) comprising a friction block (10) and a static sheet steel back (7) fixedly mounted together, the rivet (4) passing through the brake block (16) and being sleeved in turn by the Belleville spring (5) and the rivet sleeve (3); the fourth through hole (18) is a stepped counterbore, and the rivet (4) in the brake block (16) penetrates the fourth through hole (18) and extends outward therefrom, the spiral compression spring (6) being sleeved over the outside of the rivet sleeve (3), and the outer side of one end of the rivet sleeve (3) being provided with a clamping groove clamped to an elastic retainer ring (2), one end of the spiral compression spring (6) abutting a step on which a secondary counterbore (20) is located, and the other end thereof abutting the lower end face of the elastic retainer ring (2); a plurality of anti-rotation pins are arranged between the static sheet steel back (7) and the brake pad frame (1). The present brake pad has the advantages of automatically adjusting the brake clearance, ensuring the friction area at all times, improving brake efficiency, extending service life, and low manufacturing costs.