A material based on zirconium dioxide

摘要

The invention relates to the field of synthetic materials and is industrially applicable in the manufacture of wear-resistant construction parts for use under conditions of elevated temperatures, loads, and aggressive media, for cutting and machining tools, and in medical equipment. A material based on zirconium dioxide, containing yttrium and obtained by directed crystallization from batch mixture melted in a cold container, contains at least two tetragonal phases whose axes of tetragonality are 80-90°. The components of the batch mixture for obtaining the material are contained in the following ratio (in mol %): yttrium oxide, 2.8 - 3.7; zirconium dioxide, the remainder. To obtain the material, a thermal insulating layer 4 is formed by placing tamped residual pieces of the material and a powdery batch mixture on the bottom 2 of the container. Layer 9 consists of a powdery batch mixture containing metallic zirconium 8; layer 10, of residual pieces of the material; and layer 11, of powdery batch mixture and fine residual pieces of the material. During directed crystallization the rate of displacement of the container relative to inductor 12 is varied.