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Preparation and mechanical properties of Al2O3–15wt.%ZrO2composites

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
48
Issue
4
Identifiers
DOI: 10.1016/s1359-6462(02)00440-2
Keywords
  • Al2O3
  • Zro2
  • Composites
  • Mechanical Properties

Abstract

Abstract Low-temperature-sinterable high purity α-alumina powder was mixed with Zr(OH) 4 gel synthesized by a precipitation method. The resulting gel mixture was calcined at 600 °C for 2 h. The Al 2O 3–15wt.%ZrO 2 composites were sintered for 2 h in air in the temperature range between 1350 and 1500 °C. Nearly full densification and the maximum bending strength of 932 MPa were achieved for the Al 2O 3–15wt.%ZrO 2 composites sintered at 1425 °C, whereas the highest fracture toughness of 8.5 MPa m 1/2 was obtained after sintering at 1475 °C.

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