Method of preparing a composite material comprising an inorganic matrix in which vitreous carbon inclusions are dispersed, material obtained by this process and its utilisation as an electric contact

摘要

the invention is directed to a process for the preparation of a composite material comprising an inorganic matrix in which are dispersed inclusions of glassy carbon.the material obtained by this process and its use as an electrical contact.;the process includes the following steps:(a) an inorganic powder mixed with a resin liquid or viscous glassy carbon may be converted by thermal treatment.(b) subjecting the mixture of resin and inorganic powder to a first heat treatment is carried out under such conditions that a hardening of the resin by cross-linking or polycondensation, etc) make the product thus obtained with a second hardened resin heat treatment to convert the inclusions forming glassy carbon and glassy carbon.;use of the process to achieve electrical contact with a copper matrix and 3% to 6% of the inclusions of vitreous carbon.