CERAMIC PREFORMS HAVING HIGH MECHANICAL STRENGH, A PROCESS FOR THEIR PREPARATION AND METAL MATRIX COMPOSITES OBTAINED FROM SAID CERAMIC PREFORMS

摘要

Preforms for metal matrix composites consisting of ceramic material belonging to the class of oxides, nitrides, carbides, borides, oxynitrides and the like, prevailingly in an acicular form and having monocrystalline or polycrystalline structure, having a density ranging from 0.2 to 1.6 g/cm3 and porosity ranging from 50 to 95%.