A friction brake body, in particular a brake disc, for a friction brake of a motor vehicle is disclosed. The friction brake body has a main part with at least one wear protection layer on at least one frictional contact region of the main part. The wear protection layer forms a frictional contact surface on the wear protection layer face facing away from the main part. The degree of hardness of the wear protection layer increases incrementally or continuously from the main part to the frictional contact surface.

A brake element for a transportation vehicle, having a base body that is planar at least in some regions, to the planar sides of which at least two build-up layers are applied in each case at least in some regions. The build-up layers form a surface which, in the mounted state of the brake element on the transportation vehicle, serves as a friction surface for a brake pad. There is a bonding zone in which both a material of the base body and a material of a build-up layer adjacent to the base body are present, wherein the bonding zone has a thickness perpendicular to an areal extent of a planar side that is less than 10 μm.

A backing plate and associated brake pad that includes a reinforcement plate and a retention plate. The reinforcement plate has an outboard surface, an inboard surface, and a mold hole. The retention plate has an outboard surface, an inboard surface, and a locking projection that cooperates with the mold hole of the reinforcement plate to mechanically lock the retention plate to the reinforcement plate so that the inboard surface of the reinforcement plate faces the outboard surface of the retention plate. A dampening layer may be included between the reinforcement plate and the retention plate.

A brake disk including carbon steel, stainless steel or a ceramic composite material and coated with a coating material that is wear and corrosion resistant and when applied properly allows for the coated surface to have a variety of “textured” appearances. For example, the coated surface can be made to look like woven carbon fiber. The aesthetically pleasing, wear and corrosion resistant coating overlays wear surfaces and portions of the brake disk that will be, in many cases, visible when the brake disk is installed on the vehicle. The coating includes a first layer of a metal, such as a pure titanium metal, and a second layer that can include a Nitride, Boride, Carbide or Oxide of the metal used in the first layer. The coating can be applied using a physical vapor deposition source such as a cathodic arc source with a controlled gas atmosphere.

[Object]

To provide the disc brake pad including the friction material having the friction surface with the scorch treatment that can provide sufficient braking effectiveness while preventing the fading phenomenon at the initial stage of the disc brake pad usage.

[Means to Resolve]

In the disc brake pad including the friction material having the friction surface with the heat history due to the scorch treatment, the friction surface has the mixed areas including the area with the large heat history of the scorch treatment and the area with relatively small heat history of the scorch treatment. The following formula needs to be satisfied where the reduction rate of the mass of the inside of the friction material without the heat history due to the scorch treatment when performing the thermogravimetric analysis of the friction material at 500 centigrade is A, the reduction rate of the mass of the friction surface area with the largest heat history due to the scorch treatment when performing the thermogravimetric analysis at 500 centigrade is B1, and the reduction rate of the mass of the friction surface area with the relatively small heat history due to the scorch treatment relative to the friction surface area with the largest heat history when performing the thermogravimetric analysis at 500 centigrade is B2.

30≤B1/A×100≤90

50≤B2/A×100

B2/A×100−B1/A×100≤60  Formula:

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 brake pad includes a backing plate that defines a first plane. A brake lining is attached to the backing plate, and has a first layer, a second layer and a third layer. The first layer includes a first material, a first side fixed to the brake lining attachment surface and a second side opposite the first side. The second side defines a second plane non-parallel to the first plane. The second layer includes a second material, a first side and a second side. The first side of the second layer extends along the second side of the first layer and along the second plane. The second material is different from the first material. The third layer includes the first material, overlays and attaches to the second side of the second layer, and has a friction surface that is parallel to the first plane.

A brake pad has a brake lining with a first section and a second section. The first section includes a plurality of first layers having a first material and a plurality of second layers having a second material. The first material is different from the second material. The plurality of first layers and the plurality of second layers are alternatingly arranged between one another. The second section includes a plurality of third layers having the second material and a plurality of fourth layers having the first material. The plurality of third layers and the plurality of fourth layers are alternatingly arranged between one another. The plurality of first layers are adjacent to corresponding ones of the plurality of third layers are co-planar with one another. Further, the plurality of second layers are adjacent to corresponding ones of the plurality of fourth layers are co-planar with one another.

A carbon-carbon composite preform including a plurality of layers including carbon fibers or carbon-precursor fibers, the layers include a first exterior layer defining a first major surface, a second exterior layer defining a second major surface, and at least one interior layer disposed between the first exterior layer and the second exterior layer, the at least one interior layer having a peripheral region that forms a portion of an outer surface of the preform. The preform includes needled fibers, where at least some needled fibers extend through two or more layers. The preform has an exterior region and a core region, where the exterior region includes at least the peripheral region of at least one interior layer. The needled fibers define a first needled fiber number density (NFND) in the exterior region and a second greater NFND in at least a portion of the core region.

A brake pad having a surface coating operable to enhance the bedding-in process during normal operation. The surface coating may be formulated using one or more materials found in a friction lining of the brake pad. The surface coating may be formulated using only non-metal materials.