MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF HOT ISOSTATICALLY PRESSEDZIRCONIA (2 MOL-PERCENT YTTRIA)-REINFORCED TUNGSTEN DISILICIDE COMPOSITES

Authors
YAMAGUCHI K YOSHINAKA M HIROTA K YAMAGUCHI O
Citation
K. Yamaguchi et al., MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF HOT ISOSTATICALLY PRESSEDZIRCONIA (2 MOL-PERCENT YTTRIA)-REINFORCED TUNGSTEN DISILICIDE COMPOSITES, Materials research bulletin, 30(8), 1995, pp. 953-958
Citations number
14
Categorie Soggetti
Material Science
Journal title
Materials research bulletin → ACNP
ISSN journal
00255408
Volume
30
Issue
8
Year of publication
1995
Pages
953 - 958
Database
ISI
SICI code
0025-5408(1995)30:8<953:MAMOHI>2.0.ZU;2-4
Abstract
Dense sintered composites of ZrO2 (2 mol% Y2O3) and WSi2 have been fab ricated by hot isostatic pressing for 2 h at 1500 degrees C under 196 MPa. They contain a small amount of W5Si3; during sintering, WSi2 deco mposes into W5Si3 and amorphous Si. The ZrO2 particles in the composit es consist of only t-ZrO2. Microstructures and mechanical properties a re examined, in connection with ZrO2 content. The fracture toughness a nd bending strength of the composite with 40 mol% ZrO2 addition are 7. 1 MPa . m(1/2) and 1011 MPa, respectively.