Top > Search of International Patents > METHOD FOR PRODUCING HIGH-STRENGTH HIGH-TOUGHNESS ZrO2-Al2O3-BASED SOLID SOLUTION CERAMIC

METHOD FOR PRODUCING HIGH-STRENGTH HIGH-TOUGHNESS ZrO2-Al2O3-BASED SOLID SOLUTION CERAMIC

Foreign code F120007059
File No. S2011-0734-N0
Posted date Nov 28, 2012
Country WIPO
International application number 2012JP061196
International publication number WO 2012/153645
Date of international filing Apr 26, 2012
Date of international publication Nov 15, 2012
Priority data
  • P2011-107228 (May 12, 2011) JP
Title METHOD FOR PRODUCING HIGH-STRENGTH HIGH-TOUGHNESS ZrO2-Al2O3-BASED SOLID SOLUTION CERAMIC
Abstract

Provided is a method for producing a high-strength high-toughness ZrO2-Al2O3-based solid solution ceramic. Y2O3 in an amount of 0.3-1.7 mol% is added ZrO2 employing a sol-gel method to prepare an amorphous ZrO2-(20-30 mol% Al2O3) solid solution powder, and the resultant amorphous solid solution powder is pre-sintered at a temperature equal to or higher than a crystallization temperature, thereby preparing a crystalline ZrO2 solid solution powder (step A). The resultant crystalline ZrO2 solid solution powder is molded, and the molded product is then sintered in an inert gas atmosphere under the conditions of a temperature rising rate of 50 C/min or more, a pressure of 30-100 MPa and a sintering temperature of 1250-1350 DEG C for 3-30 minutes (step B). In this process, it is preferred to perform the molding in the step B by means of cold isostatic press and perform the sintering by a pulse current pressure sintering method or a spark plasma sintering method in an argon or nitrogen gas atmosphere.

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • THE DOSHISHA,
  • HIROTA, KEN,
  • SATO, HIDEYUKI,
  • SHIBAYA, KENGO
  • Inventor
  • HIROTA, KEN,
  • SATO, HIDEYUKI,
  • SHIBAYA, KENGO
IPC(International Patent Classification)

PAGE TOP

close
close
close
close
close
close