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Thermoelastic Behavior in Ca 2 SiO 4 Solid Solutions
Author(s) -
Fukuda Koichiro,
Maki Iwao,
Ito Suketoshi
Publication year - 1996
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.1151-2916.1996.tb08727.x
Subject(s) - thermoelastic damping , materials science , diffusionless transformation , silicate , phase (matter) , solid solution , optical microscope , mineralogy , transformation (genetics) , analytical chemistry (journal) , crystallography , thermodynamics , chemical engineering , composite material , metallurgy , chemistry , microstructure , martensite , scanning electron microscope , thermal , biochemistry , physics , organic chemistry , chromatography , gene , engineering
Dicalcium silicate solid solutions (C 2 S(ss)) doped with Na 2 O, A1 2 O 3 , and Fe 2 O 3 were examined by high‐temperature optical microscopy. Surface deformation caused by a possible martensitic transformation between a′ L and β phases was observed in situ under the microscope during temperature changes, indicating that the transformation was thermoelastic. Both the start and finish temperatures of the a′ L ‐to‐β and β‐to‐a′ L transformations decreased with increased Na:(Na + Ca) ratio. Because of the athermal nature of the a′ L ‐to‐β transformation, the a′ L phase, when cooled below the finish temperature, should have been completely converted to the β phase.