A METAL MATRIX CERAMIC COMPOSITE (MMCC) WEAR PART AND METHOD OF PREPARING THE SAME

摘要

A metal matrix ceramic composite wear part comprises a wearing portion formed by a ceramic cake impregnated by metal. The ceramic cake comprises ceramic grains comprising alumina, and gains of a carbide. The inclusion of carbide grains reduces wear. Preferably the alumina comprising grains comprise alumina, zirconia and titanium oxide, wherein alumina is preferably present in an amount of 30 to 65%, zirconia in an amount of 30 to 65% and titanium oxide in an amount of 1 to 7%, all percentage being expressed in weight of the grains. Preferably the ceramic cake further comprises fine ceramic powder, preferably in the range of 1 to 4% by weight of the grains.