METHOD OF MAKING A SINTERED SILICOM CARBIDE CERAMIC ARTICLE

摘要

A method of manufacturing a sintered silicon carbide ceramic part in which is formed a mixture of carbide powder with a sintering additive based on boron, beryllium or aluminium, and an injection moulding additive comprising a mixture of polystyrene and a wax. A moulded part is manufactured by injection moulding and is then baked and is finally sintered. Polystyrene is used simultaneously as a moulding agent and as a carbonizable substance. When the moulded part is baked it is heated in air to a temperature between 230 DEG C. and 330 DEG C. and is then kept at that temperature for a fairly long time to remove the wax and to reticulate and oxidize the polystyrene. Application to manufacturing dense sintered parts.