Crystal Nucleation and Growth Rates, Time–Temperature Transformation Diagram, and Mechanical Properties of a SiO2–Al2O3–CaO–MgO–(R2O) Glass in the Presence of Cr2O3, Fe2O3, and TiO2 Nucleants
Crystal Nucleation and Growth Rates, Time–Temperature Transformation Diagram, and Mechanical Properties of a SiO2–Al2O3–CaO–MgO–(R2O) Glass in the Presence of Cr2O3, Fe2O3, and TiO2 Nucleants
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DOI：
10.1111/j.1744-7402.2009.02419.x
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发表时间：
2011
影响因子：
2.1
通讯作者：
M. Rezvani;V. Marghussian;B. Eftekhari Yekta
中科院分区：
文献类型：
--
作者：
M. Rezvani;V. Marghussian;B. Eftekhari Yekta
利用差热分析、X射线衍射和扫描电子显微镜研究了SiO_2-Al_2O_3-CaO-MgO-（R_2O）玻璃在Cr_2O_3、Fe_2O_3和TiO_2成核剂存在下的析晶过程。对于含有所有三种成核剂的最有希望的玻璃样品，铝透辉石晶体的最佳成核和生长速率分别为1018 m3/s和6.17 ± 0.55 × 10−9 m/s。对于上述玻璃样品，还构建了82重量%结晶的时间-温度转变（TTT）图，并且获得了约55分钟的鼻时间。对热处理试样的抗弯强度进行了测定，并与结晶行为和显微组织有关。获得的最高强度值为166 ± 6 MPa。
The crystallization of a SiO2–Al2O3–CaO–MgO–(R2O) glass in the presence of Cr2O3, Fe2O3, and TiO2 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 1018 m3/s and 6.17 ± 0.55 × 10−9 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.