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Major Influences on the Particle‐Size–Transformation‐Temperature Relation in Al 2 O 3 –ZrO 2 Composites
Author(s) -
Yuan Lijian,
Yen Tungsheng
Publication year - 1992
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.1151-2916.1992.tb05614.x
Subject(s) - nucleation , diffusionless transformation , materials science , transformation (genetics) , particle (ecology) , ceramic , composite material , energetics , particle size , thermodynamics , martensite , chemistry , microstructure , physics , biochemistry , oceanography , gene , geology
The energetics of martensitic transformation in ZrO 2 is studied using a thermodynamic approach, with particular reference to Al 2 O 3 –ZrO 2 composites. The different characters of three types of transformation‐toughened ceramics are analyzed, and several factors affecting the t → m transformation in Al 2 O 3 –ZrO 2 composites are discussed. The expression of transformation temperature dependence on particle size is derived and has good agreement with experimental results. The energetics concerned with nucleation of martensitic transformation is also discussed.