Mechanical properties of alumina-zirconia-silver composites

Journal Article · Tue Jan 31 23:00:00 EST 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08825.x· OSTI ID:79817

Tuan, W H; Chen, W R ^[1]

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1. National Taiwan Univ., Taipei (Taiwan, Province of China). Inst. of Materials Science and Engineering

Either ceramic inclusions or metallic inclusions can be used to enhance the mechanical properties of ceramics. In the present study, both silver inclusions and zirconia agglomerates have been added to alumina. The presence of the inclusions inhibits the grain growth of the alumina matrix. The strength of Al{sub 2}O{sub 3}-ZrO{sub 2}-Ag composites is increased by microstructural refinement. Together with the plastic deformation of silver inclusions and the phase transformation of tetragonal zirconia agglomerates, the toughness of the composites is enhanced. Because silver inclusions and zirconia agglomerates are attached after sintering, the toughness increase for the Al{sub 2}O{sub 3}-ZrO{sub 2}-Ag composites is less than the sum of the toughness increments for Al{sub 2}O{sub 3}-Ag and Al{sub 2}O{sub 3}-ZrO{sub 2} composites.

• Sponsoring Organization: USDOE
• OSTI ID: 79817
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 2 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BULK DENSITY
COMPOSITE MATERIALS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
MECHANICAL PROPERTIES
MICROSTRUCTURE
NOTCHES
OPTICAL MICROSCOPY
SCANNING ELECTRON MICROSCOPY
SILVER
TENSILE PROPERTIES
X-RAY DIFFRACTION
ZIRCONIUM OXIDES