Abstract: The invention relates to a pre-impregnated fibre-reinforced composite material in laminar form, obtained impregnating a fibrous mass with a polymeric binder composition and intended to be subjected to successive forming and pyrolysis operations to produce a fibre-reinforced composite ceramic material. The polymeric binder composition is based on one or more resins chosen from the group consisting of siloxane resins and silsesquioxane resins, and can optionally comprise one or more organic resins. The polymeric binder composition is a liquid with viscosity between 55000 and 10000 mPas at temperatures between 50° C. and 70° C. The polymeric binder composition forms a polymeric binding matrix, not cross-linked or only partially cross-linked that fills the interstices of the fibrous mass. The invention also relates to a method for making said pre-impregnated fibre-reinforced composite material in laminar form.

Abstract: A method makes a silicon compound-based passivating coating on a ceramic matrix composite reinforced with carbon fibers. A piece made in a ceramic matrix composite reinforced with carbon fibers is placed in a closed chamber of an oven. A predefined load of solid silicon is placed in the chamber avoiding direct contact between the silicon and the piece. The oven is heated while maintaining inside the chamber predefined medium/low vacuum conditions, to generate silicon vapors inside the chamber. The vapors react with substances on the surface of the piece to form a surface coating having composites of the substances with the silicon. The partial pressure of the vacuum, temperature inside the chamber and exposure times of the piece to the silicon vapors to obtain a predefined thickness of the surface coating are chosen. The piece is cooled once the predefined thickness of the passivating coating is reached.

Abstract: A chemical vapor infiltration (CVI) method for densifying at least one porous component includes placing the at least one porous component inside a crucible, bringing temperature inside the crucible to a value adapted to densify the porous component to transform it into a densified component, bringing pressure inside the crucible between 0.1 KPa and 25 KPa, once operational temperature and pressure are reached, flowing gas inside the crucible, gas being suitable for densifying the porous component to transform it into a densified component, and keeping an oxidizing environment outside the crucible, the external environment lapping against the crucible. The crucible is provided of at least one material having thermal conductivity greater than 30 W/mK from room temperature to at least 1000° C.

Abstract: The present invention concerns a shaped composite material and a method for producing it. More specifically, the invention concerns a disc for a disc brake made from ceramic composite materials, usually known as “CMC”, i.e. “Carbon Material Ceramic” or “CCM”, i.e. “Carbon Ceramic Material”. These materials consist of carbon matrices containing carbon fibres usually infiltrated with silicon and a product of reaction between C and Si, silicon carbide (SiC). More specifically, the invention concerns a shaped composite material comprising a inner layer (3; 103) of CCM C/SiC/Si material comprising disorderly short filaments consisting mainly of carbon and respective outer layers (2, 2?; 102, 102?) of C/SiC/Si material and having an orderly fabric structure of mainly carbon fibres.

Abstract: The invention relates to a pre-impregnated fibre-reinforced composite material in laminar form, obtained impregnating a fibrous mass with a polymeric binder composition and intended to be subjected to successive forming and pyrolysis operations to produce a fibre-reinforced composite ceramic material. The polymeric binder composition is based on one or more resins chosen from the group consisting of siloxane resins and silsesquioxane resins, and can optionally comprise one or more organic resins. The polymeric binder composition is a liquid with viscosity between 55000 and 10000 mPas at temperatures between 50° C. and 70° C. The polymeric binder composition forms a polymeric binding matrix, not cross-linked or only partially cross-linked that fills the interstices of the fibrous mass. The invention also relates to a method for making said pre-impregnated fibre-reinforced composite material in laminar form.

Abstract: A brake disc made of fiber-reinforced material includes a braking band having a predetermined thickness. The method for making the brake discs includes setting up a winding mandrel and forming at least one layer of fibers having a predetermined width. The layer of fibers is impregnated with a binder resin. The impregnated layer is wound about the mandrel, forming a hollow cylindrical body having a predefined outer diameter and an inner diameter substantially equivalent to the mandrel diameter. The layer of fibers is wound about the mandrel in a winding direction substantially parallel to the lengthwise direction of the layer. The cylindrical body is heated to at least partly cross-link the binder resin and obtain a solid semi-finished cylindrical body. The cylindrical body is cut in slices transversely to the cylindrical body axis according to predetermined thicknesses. Each slice is a disc-shaped body defining the disc's braking band.

Abstract: The present invention relates to a method of printing a composite material (1), for example polymeric, carbonaceous, siliconic or metallic comprising steps of: i) providing a plurality of bundles (2) of reinforcement fibers (4), wherein the reinforcement fibers (4) have a length in the range 3-50 mm and are in the number of about 1,000-100,000 in each bundle (2); ii) aligning the bundles (2) along a predetermined path (X, X?); iii) incorporating at least part of the bundles (2) into a matrix (6, 8), for example polymeric, carbonaceous, siliconic or metallic, preserving the alignment along said path (X, X?); iv) laying and solidifying at least one layer (8) of the matrix (6, 8) of step iii) to make the composite material (1).

Abstract: A method for manufacturing a composite brake disc (1), comprising shaping a bell (2) through deep-drawing of a metal sheet (20), forming at least one groove (22) in a surface of a bottom portion (24) of the metal sheet (20) and, then, pushing the bottom portion (24) relative to an outer portion (25) in a retro-forming direction (23) opposite the drawing direction (20), connecting, a brake band (3) to the bell (2).

Abstract: The invention illustrates a material for friction components of disc brakes comprising between 1% and 8% by weight of at least one preceramic resin and between 2% and 10% by weight of at least one organic resin. It also illustrates a friction component for a disc brake, a disc brake, and a process for producing such a material.

Abstract: The present invention relates to a method of printing a composite material (1), for example polymeric, carbonaceous, siliconic or metallic comprising steps of: i) providing a plurality of bundles (2) of reinforcement fibres (4), wherein the reinforcement fibres (4) have a length in the range 3-50 mm and are in the number of about 1,000-100,000 in each bundle (2); ii) aligning the bundles (2) along a predetermined path (X, X?); iii) incorporating at least part of the bundles (2) into a matrix (6, 8), for example polymeric, carbonaceous, siliconic or metallic, preserving the alignment along said path (X, X?); iv) laying and solidifying at least one layer (8) of the matrix (6, 8) of step iii) to make the composite material (1).

Abstract: A method makes brake discs of fiber-reinforced materials. Each brake disc includes a braking band having a predefined thickness. At least one fiber layer having a predefined width is formed and wound around the mandrel to form a coaxially hollow cylindrical body having an outer diameter and an inner diameter substantially equivalent to the mandrel diameter. The fiber layer is wound around the mandrel in a winding direction substantially parallel to the direction of the layer length. The semi-finished cylindrical body is cut in slices transversally to the longitudinal axis of the cylindrical body in predefined thicknesses. Each slice is a disc-shaped body defining the braking band of a brake disc. The cylindrical body is needled according to a substantially radial direction to orient part of the fibers according to this direction by arranging the fibers in connection between adjacent coils of the fiber layer wound around the mandrel.

Abstract: Caliper bodies are provided for disc brakes suitable for being arranged astride of a disc for a disc brake, which include an attachment side portion, a non-attachment side portion and at least one bridge, said bridge being suitable for connecting such side portions and for being arranged astride of the disc, wherein the caliper body includes at least one portion made from thermoplastic material, reinforced with carbon fibres, with resistance to a temperature of at least 200° C. Disc brakes which incorporate such caliper bodies are also provided.

Abstract: A method for treating a piece (1) made of a first porous material (8) with a second material (2) when this second material is in liquid state, said second material (2) being suitable for infiltration when a predetermined temperature range (DTi) and a predetermined field of infiltration pressure (Dpi), comprises the steps of: —providing a crucible (4) suitable for containing the piece (1) and the second material (2) and capable of withstanding the temperatures and pressures for the infiltration of the second material (2) in the piece (1); providing a cover (5) for the crucible (4) suitable for closing the crucible creating a chamber (6) inside the crucible; placing the piece (1) and the second material (2) in said crucible chamber (6), when this second material is not yet in liquid state; —subsequently closing the crucible (4) with the cover (5); —at a pressure (pa or pa1)—unsuitable for the infiltrations of the second material in the first porous material, raising the temperature of the piece (1) and the seco

Abstract: A brake disc made of fiber-reinforced material includes a braking band having a predetermined thickness. The method for making the brake discs includes setting up a winding mandrel and forming at least one layer of fibers having a predetermined width. The layer of fibers is impregnated with a binder resin. The impregnated layer is wound about the mandrel, forming a hollow cylindrical body having a predefined outer diameter and an inner diameter substantially equivalent to the mandrel diameter. The layer of fibers is wound about the mandrel in a winding direction substantially parallel to the lengthwise direction of the layer. The cylindrical body is heated to at least partly cross-link the binder resin and obtain a solid semi-finished cylindrical body. The cylindrical body is cut in slices transversely to the cylindrical body axis according to predetermined thicknesses. Each slice is a disc-shaped body defining the disc's braking band.

Abstract: The present invention concerns a shaped composite material and a method for producing it. More specifically, the invention concerns a disc for a disc brake made from ceramic composite materials, usually known as “CMC”, i.e. “Carbon Material Ceramic” or “CCM”, i.e. “Carbon Ceramic Material”. These materials consist of carbon matrices containing carbon fibres usually infiltrated with silicon and a product of reaction between C and Si, silicon carbide (SiC). More specifically, the invention concerns a shaped composite material comprising a inner layer (3; 103) of CCM C/SiC/Si material comprising disorderly short filaments consisting mainly of carbon and respective outer layers (2, 2?; 102, 102?) of C/SiC/Si material and having an orderly fabric structure of mainly carbon fibres.

Abstract: Method for making a ceramic matrix material for brake friction components, in particular disc brakes, including the following operational phases: a) prepare a mixture of at least one siliconic type ceramic precursor, particles of hard materials suitable as abrasives, particles of substances suitable as lubricants and particles of metal materials; b) hot-press the mixture to obtain a green body; c) submit the green body to a process of pyrolysis in order to achieve ceramisation of the preceramic binder, thus obtaining a ceramic matrix material. The mixture includes a catalyst suitable for favoring reticulation of the ceramic precursor during the hot-pressing phase and the pyrolysis process is carried out at temperatures below 800° C., more precisely between 400° C. and 600° C.

Abstract: The invention illustrates a material for friction components of disc brakes comprising between 1% and 8% by weight of at least one preceramic resin and between 2% and 10% by weight of at least one organic resin. It also illustrates a friction component for a disc brake, a disc brake, and a process for producing such a material.

Abstract: A method for manufacturing a composite brake disc (1), comprising shaping a bell (2) through deep-drawing of a metal sheet (20), forming at least one groove (22) in a surface of a bottom portion (24) of the metal sheet (20) and, then, pushing the bottom portion (24) relative to an outer portion (25) in a retro-forming direction (23) opposite the drawing direction (20), connecting, a brake band (3) to the bell (2).

Abstract: Caliper bodies are provided for disc brakes suitable for being arranged astride of a disc for a disc brake, which include an attachment side portion, a non-attachment side portion and at least one bridge, said bridge being suitable for connecting such side portions and for being arranged astride of the disc, wherein the caliper body includes at least one portion made from thermoplastic material, reinforced with carbon fibres, with resistance to a temperature of at least 200° C. Disc brakes which incorporate such caliper bodies are also provided.

Abstract: A method for treating a piece (1) made of a first porous material (8) with a second material (2) when this second material is in liquid state, said second material (2) being suitable for infiltration when a predetermined temperature range (DTi) and a predetermined field of infiltration pressure (Dpi), comprises the steps of: —providing a crucible (4) suitable for containing the piece (1) and the second material (2) and capable of withstanding the temperatures and pressures for the infiltration of the second material (2) in the piece (1); providing a cover (5) for the crucible (4) suitable for closing the crucible creating a chamber (6) inside the crucible; placing the piece (1) and the second material (2) in said crucible chamber (6), when this second material is not yet in liquid state; —subsequently closing the crucible (4) with the cover (5); —at a pressure (pa or pa1)—unsuitable for the infiltrations of the second material in the first porous material, raising the temperature of the piece (1) and the seco