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Mechanical Properties of Al 2 O 3 ‐NiAl Composites
Author(s) -
Tuan WeiHsing,
Pai YuPan
Publication year - 1999
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.1151-2916.1999.tb01974.x
Subject(s) - nial , materials science , composite material , toughness , hot pressing , fracture toughness , toughening , microstructure , intermetallic , alloy
The mechanical properties of the Al 2 O 3 ‐NiAl system are investigated in the present study. Specimens containing 0 to 100 vol% NiAl in Al 2 O 3 were prepared by hot pressing. Both the strength and toughness of the Al 2 O 3 ‐NiAl composites are higher than the values predicted by the rule of mixtures. The grain growth of Al 2 O 3 and NiAl in the composites is constrained by each component. The increase in strength is thus partly attributed to microstructural refinement. The toughness enhancement is contributed by a combination of crack deflection and crack bridging.