| abstract |
The invention belongs to the field of composite gradient ceramics and discloses an alumina-based ceramics toughened by textured silicon carbide whiskers and a preparation method and application thereof. The alumina-based ceramics use alumina, silicon carbide whiskers and sintering aids MgO or Y 2 O 3 as raw materials, paraffin as structural aids, firstly mixing the raw materials to obtain mixed powder, and dispersing the mixed powder in a liquid state In hot paraffin, the casting is obtained after casting and cooling, and the casting is extruded at room temperature to achieve texture, and the green body is obtained after removing the paraffin at high temperature. have to. The method of the invention realizes the preparation of the textured alumina-based ceramics in which the silicon carbide whiskers are arranged radially, and has high wear resistance and thermal conductivity on the friction surface. It is beneficial to reduce cutting temperature, has higher stability, and has obvious application advantages compared with common ceramic tools on the market. |