Method for making a ceramic matrix material for friction components of brakes and ceramic matrix material made by such method

摘要

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.

主权项

1. A method for making a ceramic matrix material for friction components for brakes, said method comprising the following operational phases:
preparing a mixture of at least one siliconic type ceramic precursor, with particles of hard abrasive materials, lubricant particles and particles of metal materials; hot-pressing the mixture to obtain a green body; submitting said green body to a process of pyrolysis in order to achieve ceramisation of the preceramic binder, thus obtaining said ceramic matrix material; wherein said mixture comprises a catalyst favoring reticulation of said ceramic precursor during said hot-pressing phase and wherein said pyrolysis phase is carried out at temperatures below 800° C., in which said pressing phase is carried out at pressures between 250 and 500 kg/cm2 and said pyrolysis process is carried out at maximum temperatures between 400 and 600° C.