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Thermal Hysteresis for the α′ L ↫β Transformations in Strontium Oxide‐Doped Dicalcium Silicates
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.tb08735.x
Subject(s) - strontium , hysteresis , thermal hysteresis , materials science , oxide , mineralogy , doping , analytical chemistry (journal) , condensed matter physics , thermodynamics , chemistry , metallurgy , phase transition , physics , optoelectronics , organic chemistry , chromatography
A series of Sr‐bearing Ca 2 SiO 4 solid solutions (C 2 S( ss )), (Sr x Ca 1−x ) 2 SiO 4 with 0 ≤ x ≤ 0.12, was prepared. They were examined by high‐temperature powder X‐ray diffractome‐try to determine the start and finish temperatures of the α′ L ‐to‐β and β‐to‐α′ L martensitic transformations. The thermal hysteresis was positive with x < 0.045, nearly equal to zero at x = 0.045, and negative with x > 0.045. The zero and negative hysteresis were consistent with the thermoelasticity of the transformations. With increasing x from 0.02 to 0.08, the hysteresis decreased steadily from positive to negative, suggesting a continuous increment in the stored elastic energy.