| 摘要 |
Method for manufacturing friction disks with ceramic materials with at least one friction layer, with a matrix containing silicon carbide, silicon and carbon, in the first step a mixture of a fine silicon and/or fine particles of other carbide-forming elements with at least one other component selected from a resin in particulate form and a binder selected from resins, pitches and mixtures of them, being prepared, in the second step, the mixture being deaerated and at an elevated temperature of up to 280° C. being pressed and hardened into a cylindrical or cylindrical annular disk, in the third step the hardened disk being treated by heating to a temperature of approx. 750° C. to approx. 1300° C. with the exclusion of oxidizing agents, the binders decomposing with the formation of a carbon residue, and a porous carbon body remaining, in the fourth step, the porous carbon body being heated to above the melting point of the silicon or other carbide-forming elements, their reacting with the carbon formed and yielding an alveolar structure with a skeleton of formed carbides and unreacted residues of carbon or carbide-forming elements, and in the fifth step additional silicon being added at a temperature above its melting point, at least some of the pores of the structure being filled with elementary silicon, and unreacted carbon of the alveolar structure reacting with silicon to form silicon carbide, and use of the friction disks produced in this way as brake disks or clutch driving disks. |
