| abstract |
Provided is a method for producing high-strength toughness ZrO 2 -Al 2 O 3 solid solution ceramics. An amorphous solid solution powder of ZrO 2 -20 to 30 mol% Al 2 O 3 in which 0.3 to 1.7 mol% Y 2 O 3 is added to ZrO 2 by using a sol-gel method is obtained and obtained. The amorphous solid solution powder was calcined at a temperature equal to or higher than the crystallization temperature to prepare a crystalline ZrO 2 solid solution powder (Step A), and the obtained crystalline ZrO 2 solid solution powder was molded, Sintering is performed under an inert gas atmosphere at a temperature rising rate of 50 ° C./min or more, a pressure of 30 to 100 MPa, and a sintering temperature of 1250 to 1350 ° C. for 3 to 30 minutes (step B). At this time, it is preferable that the molding in the step B is performed by a cold isostatic pressing, and the sintering is performed by a pulse current pressure sintering method or a discharge plasma sintering method in an argon gas or nitrogen gas atmosphere. |