In:
Journal of the American Ceramic Society, Wiley, Vol. 76, No. 7 ( 1993-07), p. 1821-1824
Abstract:
The α‐to‐α′ H transition of Ca 2 SiO 4 solid solutions (C 2 S(ss)) is a nucleation and growth process. This process was shown on time–temperature–transformation (TTT) diagrams for C 2 S(ss) with different concentrations of foreign oxides (Na 2 O, Al 2 O 3 , and Fe 2 O 3 ). The kinetic cutoff temperature and the activation energy for growth of the α′ H phase increase steadily with increasing concentration of impurities. The activation energy for nucleation also increases above 950°C. The α′ H phase, which exists in equilibrium with the α phase at 1280°C, is formed at a maximum rate at around 1100°C regardless of the chemical composition. The TTT diagrams enable us to predict, as a function of cooling rate, the phase constitution of C 2 S(ss) at ambient temperature.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.1993.76.issue-7
DOI:
10.1111/j.1151-2916.1993.tb06653.x
Language:
English
Publisher:
Wiley
Publication Date:
1993
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
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