Microstructure and mechanical properties of hot isostatically pressed zirconia (2 mol% yttria)-reinforced tungsten disilicide composites

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Materials Research Bulletin

DOI:https://doi.org/10.1016/0025-5408(95)00089-5· OSTI ID:99211

Yamaguchi, Kotaro; Yoshinaka, Masaru; Hirota, Ken; Yamaguchi, Osamu ^[1]

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1. Doshisha Univ., Kyoto, Tanabe (Japan)

Dense sintered composites of ZrO{sub 2} (2 mol% Y{sub 2}O{sub 3}) and WSi{sub 2} have been fabricated by hot isostatic pressing for 2 h at 1500 C under 196 MPa. They contain a small amount of W{sub 5}Si{sub 3}; during sintering, WSi{sub 2} decomposes into W{sub 5}Si{sub 3} and amorphous Si. The ZrO{sub 2} Particles in the composites consists of only t-ZrO{sub 2}. Microstructures and mechanical properties are examined, in connection with ZrO{sub 2} content. The fracture toughness and bending strength of the composite with 40 mol% ZrO{sub 2} addition are 7.1 MPa{center_dot}m{sup 1/2} and 1,011 MPa, respectively.

• OSTI ID: 99211
• Journal Information: Materials Research Bulletin, Vol. 30, Issue 8; Other Information: PBD: Aug 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
HOT PRESSING
MICROSTRUCTURE
MECHANICAL PROPERTIES
ZIRCONIUM OXIDES
YTTRIUM OXIDES
TUNGSTEN SILICIDES
INTERMETALLIC COMPOUNDS
CHEMICAL COMPOSITION
FRACTURE PROPERTIES
FLEXURAL STRENGTH
TETRAGONAL LATTICES