A brake disk includes a basic material formed of gray cast iron, a decarburized layer formed on the basic material and formed via decarburizing, and a nitride compound layer formed on the decarburized layer and formed via nitriding of a nitride. A method of manufacturing a brake disk includes preparing a disk formed of gray cast iron, performing heat treatment of the disk to form a pre-decarburized layer and a base layer of gray cast iron over which the pre-decarburized layer is formed, and nitriding a portion of the pre-decarburized layer to form a nitride compound layer including a nitride and a decarburized layer over which the nitride compound layer is formed.

A brake disk may comprise a friction disk formed of at least one of a carbon fiber-ceramic matrix composite material or a carbon fiber-carbon matrix composite material. A first surface of the friction disk defines a first recess. A first ceramic insert comprising ceramic powder may be located in the first recess.

An article includes a structural core, one or more friction pads, and a plurality of elongated fasteners. The structural core includes two core surfaces and a plurality of pockets extending between the core surfaces. Each friction pad includes a pad surface and a friction surface opposite the pad surface. Each pad surface includes a planar pad surface configured to contact the core surface and a plurality of bosses extending from the first planar pad surface and including a bore. Each planar pad surface is at least about 50% of a surface area of the respective first and second pad surfaces. The plurality of bosses engages with the plurality of pockets to position the respective first and second friction pads relative to the structural core. The plurality of elongated fasteners passes through bores of corresponding bosses of friction pads to fasten the friction pads to the structural core.

A brake drum for a drum brake, in particular of a motor vehicle, includes a cylindrical jacket and a support pot which axially adjoins the jacket and which has a hub ring portion to be secured to a wheel hub. The monolithic brake drum is formed at least in part of a fiber-reinforced plastic.

A vented brake disc according to the present disclosure comprises a first braking plate having a first inner surface and a first outer surface; a second braking plate parallel with and spaced apart from the first braking plate, the second braking plate having a second outer surface, and a second inner surface facing the first inner surface; a plurality of channels defined by two walls adjacent to each other, the channels communicating with the inner peripheral space of the first braking plate and with the inner peripheral space of the second braking plate; a hat portion having a mounting surface and a peripheral portion extended axially from the mounting surface; a first blocking part preventing outboard communication of any one of the channels, the first blocking part connecting the peripheral portion to the first braking plate; and a second blocking part preventing inboard communication of the channel adjacent to the channel where the outboard communication is prevented by the first blocking part, the second blocking part connecting the peripheral portion to the second braking plate. The channels are provided between the first inner surface of the first braking plate and the second inner surface of the second braking plate. The first blocking part and the second blocking part are provided along the peripheral portion.

In some examples, a brake disc assembly including a single continuous core portion defining a core of the brake disc assembly; and a friction portion adjacent the core portion. The friction portion defines the friction surface of the brake disc assembly during a braking operation. The friction portion includes a carbon composite material. The core portion includes a core material that is not a carbon composite material, and the core portion is configured as a heat sink for the brake disc assembly for heat generated during the braking operation.

A brake assembly includes a wheel hub having a radially-outer diameter and a plurality of splines that are spaced apart around the radially-outer diameter. A brake disc is mounted on the wheel hub and has a radially-inner diameter and a plurality of pockets that are spaced apart around the radially-inner diameter. The pockets receive the splines such that the brake disc rotates with the wheel hub. Each pocket has opposing axially-extending side walls. Each side wall has an outwardly-chamfered outboard end and an inboard locking recess. A plurality of spacers are radially disposed between the splines and pockets. Each spacer has opposing arms connected together by a brace. Each arm has an outwardly-chamfered end and outwardly-projecting locking foot which together mate with the outwardly chamfered outboard end and inboard locking recess, respectively, so as to lock the spacer in the pocket.

A full carbon-ceramic axle-mounted brake disc is disclosed, including a disc hub (2) and a plurality of friction discs (1) sleeved on the disc hub (2) and coaxially stacked. The plurality of friction discs (1) and the friction discs (1) and the disc hub (2) are locked and connected integrally through connecting structures. The friction discs (1) are made of a carbon-ceramic composite material and are composed of heat dissipation reinforcing ribs (11) arranged radially on a disc face (10) and a back face, the heat dissipation reinforcing ribs (11) between the stacked friction discs being in contact with each other on a one-to-one basis. Radial heat dissipation channel (12) are formed on two sides of the heat dissipation reinforcing rib (11), and a connecting groove (13) connecting the radial heat dissipation channels (12) on the two sides is formed between the heat dissipation reinforcing ribs (11). The full carbon-ceramic axle-mounted brake disc has the advantages of a simple structure, excellent heat dissipation effects, reliable connection, high structural strength, convenient maintenance, and a light weight, and reduces the energy consumption and maintenance costs of a transport vehicle while ensuring reliable braking.

A fiber preform defining an annulus extending along a central longitudinal axis. The fiber preform includes a plurality of layers extending in an axial direction and a circumferential direction relative to the longitudinal axis. Each layer of the plurality of layers includes a plurality of elongate fibers. The plurality of elongate fibers include a plurality of elongate axial fibers extending substantially in the axial direction and a plurality of elongate circumferential fibers extending substantially in the circumferential direction. The fiber preform also includes a plurality of radial fibers extending substantially in the radial direction. The plurality of radial fibers mechanically bind one or more adjacent layers of the plurality of layers. At least 40% of the plurality of elongate fibers extend substantially in the axial direction.

A method that includes winding a composite fabric around a mandrel to form a plurality of layers defining an annulus extending along a central longitudinal axis, where the composite fabric includes a plurality of elongate axial fibers extending substantially in an axial direction relative to the longitudinal axis and a plurality of elongate circumferential fibers extending substantially in a circumferential direction relative to the longitudinal axis; and introducing, into at least a portion of the plurality of layers, a plurality of radial fibers extending substantially in the radial direction relative to the longitudinal axis, where the plurality of radial fibers mechanically bind one or more adjacent layers of the plurality of layers.