METHOD FOR IMPROVING TOUGHNESS OF SURFACE OF CERAMIC AND CERAMIC ARTICLE

摘要

A method for improving the toughness of the surface of a ceramics product, characterized in that the ceramics product is substituted to a plastic working wherein a dislocated structure is formed in the sub-surface regions thereof, the structure being in a straight line form and covering uniformly over the whole of the ceramics product and having a dislocation density of 1 x 10<4> to 9 x 10<13> cm<-2>, by the use of a jet material comprising fine particles having a convexly curved surface and having an average particle size of 0.1 mu m to250 mu m and a Vickers hardness (HV) of 500 or more and of a hardness (HV) of the ceramics products +50 or less; and ceramics products which have a dislocated structure being in a straight line form and covering uniformly over the whole of the surface thereof and having a dislocation density of 1 x 10<4> to 9 x 10<13> cm<-2>. <IMAGE>