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Mechanical Properties of Alumina–Zirconia–Silver Composites
Author(s) -
Tuan WeiHsing,
Chen WaiRue
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08825.x
Subject(s) - materials science , composite material , cubic zirconia , ceramic , agglomerate , toughness , sintering , tetragonal crystal system , fracture toughness , phase (matter) , chemistry , organic chemistry
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 AI 2 O 3 ‐ZrO 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 2 O 3 ‐ZrO 2 ‐Ag composites is less than the sum of the toughness increments for Al 2 O 3 ‐Ag and Al 2 O 3 ‐ZrO 2 composites.