학술논문
Crystal Nucleation and Growth Rates, Time-Temperature Transformation Diagram, and Mechanical Properties of a SiO.
Document Type
Article
Source
Subject
*CRYSTAL growth
*NUCLEATION
*ISOTHERMAL transformation diagrams
*SILICA
*MECHANICAL behavior of materials
*CRYSTALLIZATION
*GLASS
*X-ray diffraction
*MICROSTRUCTURE
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Language
ISSN
1546-542X
Abstract
The crystallization of a SiO-AlO-CaO-MgO-(RO) glass in the presence of CrO, FeO, and TiO nucleants was investigated utilizing differential thermal analyses, X-ray diffraction, and scanning electron microscope. The optimum nucleation and growth rates of aluminian diopside crystals was determined for the most promising glass specimen containing all three nucleants as 10 m/s and 6.17 ± 0.55 × 10 m/s, respectively. A time-temperature transformation (TTT) diagram was also constructed for 82 wt% crystallization for the above glass sample and a nose time of ≈55 min was obtained. The bending strength of some heat-treated specimens were also determined and were related to crystallization behavior and microstructures. The highest strength value obtained was 166 ± 6 MPa. [ABSTRACT FROM AUTHOR]