CERAMIC ENGINE PART WITH IMPROVED ABRASION RESISTANCE

摘要

An engine part (2 to 24) comprising at least partially a sintered body which mainly consists of zirconia and yttria, said yttria being contained in the sintered body in an amount of 0.1 to 15 mo l % with respect to the total of zirconia and yttria. The sintered body has a surface roughness of not greater than 5S, a fracture toughness KIC of 6 to 15 MPa.m<1/2>, a porosity of not greater than 10%, and a grain size of not greater than 5 mu m.