A preform for a composite may include a plurality of fibrous layers consolidated together and forming the preform extending along a longitudinal axis. The plurality of fibrous layers includes at least one first fibrous layer and at least one second fibrous layer. The at least one first fibrous layer includes a plurality of first segments, and the least one second fibrous layer includes a plurality of second segments. At least one first segment of the plurality of first segments includes a plurality of reinforcing fibers extending at an angle relative to a radial direction extending from the longitudinal axis. At least one second segment of the plurality of second segments includes a plurality of reinforcing fibers extending at an angle + relative to the radial direction. is greater than 0 and less than 90.

A disk brake disk has a bell made of a first material and a braking band made of a second material. The bell has a bell body having a radially outer bell body portion and forms a plurality of bell projections radially protruding from the radially outer bell body portion. Each bell projection has a projection base close to the radially outer bell body portion and a distal projection portion far from the radially outer bell body portion. A braking band body is coupled to the distal projection portion. Adjacent projection bases are joined to one another by a bell rib made in a single piece with the bell body and having an inner axial rib face and an outer axial rib face. The braking band body is coupled to the inner axial rib face, leaving the outer axial rib face free and externally facing the disk brake disk.

A braking band extending between an inner diameter and an outer diameter has two plates facing each other and having inner surfaces delimiting a gap. The two plates are joined by connecting elements projecting from one of the two plates and reaching the opposite plate. A first series of fins of the connecting elements is each a fin which is in a single piece and extends from near the inner diameter to near the outer diameter and has a fin outer end portion having a predetermined extension along an outer circumferential width, and a fin inner end portion having a predetermined extension along an inner circumferential width. Considering a section taken along a section plane including the radial and circumferential directions, the outer circumferential width is greater than the inner circumferential width and the fin outer end portion of each fin faces only an adjacent fin on both sides in circumferential direction.

A brake disk with a surface which is structured in order to increase the adhesion of a coating on the surface, wherein the structuring of the surface comprises at least one recess, the depth of which decreases as the depth of the recess increases wherein the at least one recess has the shape of a spiral structure.

A brake disk includes a first surface including a first brake surface-contacting with a brake pad, a second surface including a second brake surface, a circumferential portion connecting the first surface and the second surface, and at least one of at least one first internal groove formed on the first surface, at least one second internal groove formed on the second surface, or at least one external groove formed in the circumferential portion, or any combination thereof, the at least one first internal groove includes a shape, in which the first surface is recessed in a direction facing the second surface, the at least one second internal groove includes a shape, in which the second surface is recessed in a direction facing the first surface, and the at least one external groove includes a shape, in which the circumferential portion is recessed in a direction facing a rotation axis of the brake disk.

An antioxidant coating composition may include an inorganic acid, and a hydrophobic agent including lanthanum phosphate. An article may include a substrate including carbon, and an antioxidant coating applied to at least a portion of the substrate. The antioxidant coating may include the inorganic acid, and the hydrophobic agent. A technique may include applying the antioxidant coating composition to at least the portion of the substrate, and allowing the antioxidant coating composition to dry or cure to form the antioxidant coating.

An attachment structure is a structure that attaches an annular brake disk to an attachment object member that is a wheel or a disk body of a railway vehicle. The attachment structure includes a fastening member and an elastic member. The elastic member is disposed between a nut of the fastening member and the brake disk. The elastic member has a member body having a tubular shape, and a flange. The flange is connected to an end part on the nut side among two end parts of the member body. The flange protrudes outward from the member body and contacts an outer peripheral portion of the nut.

The invention relates to a brake module (100) for a vehicle flap drive system with at least one first friction partner (130) and at least one second friction partner (160, 170), wherein the friction partners (130, 160, 170) each have at least one friction surface (140, 150, 180, 190) which rub against one another during braking operation, wherein the first friction partner (130) is formed in one piece from a plastic with a carbon fiber content.

The invention further relates to a vehicle flap drive system comprising a brake module (100).

A method for making a braking band (2) for a brake disc (1) for a disc brake, comprising the following steps: a) preparing a mold (10) having an inner cavity (11), which comprises a first portion (11a) of a shape corresponding to the braking band (2) to be made; b) preparing a band preform (20) comprising a central layer (200) made of porous ceramic material comprising silicon carbide (SiC), an upper outer layer (201) and a lower outer layer (202), said upper outer layer (201) and said lower outer layer (202) being made of porous ceramic material comprising silicon carbide (SiC) and infiltrated with silicon (SiC+Si), said upper outer layer (201) and said bottom outer layer (202) being arranged in an opposing way and on opposite sides of the central layer (200); c) placing said band preform (20) inside the mold at the first portion (11a) of said inner cavity (11); and d) injecting a liquid or semi-solid aluminum alloy inside the entire inner cavity (11) of the mold (11) so as to infiltrate only the central layer (200) of said band preform (20) made of porous ceramic material with said aluminum alloy, obtaining at the first portion (11a) an aluminum metal matrix composite reinforced by said central preform (200) which defines the braking band (2) to be made. A braking band and a brake disc are made at least with the aforesaid method.

A clip for a rotor disk of a brake assembly, the clip formed of sheet metal to fit in a slot between, and to, ends of adjacent rotor lugs around the periphery of the rotor disk, wherein the clip is shaped to have a main body portion that is substantially rectangular in form and shaped and sized to fit, in use, onto an inner peripheral surface defined by the slot between the ends of two adjacent lugs, and to extend across the length of the slot from a first main body portion edge to a second opposite main body portion edge; and wherein the clip further comprises first and second end portions that extend from the respective ends of the main body portion at an angle, wherein each end portion comprises an outwardly protruding section and an end clip portion.