کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1559303 999352 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solidification structure of CaO–SiO2–MgO–Al2O3 (–CaF2) systems and computational phase equilibria: Crystallization of MgAl2O4 spinel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Solidification structure of CaO–SiO2–MgO–Al2O3 (–CaF2) systems and computational phase equilibria: Crystallization of MgAl2O4 spinel
چکیده انگلیسی

The solidification behaviour of the CaO–SiO2–Al2O3–CaF2–10% MgO system, which is similar to the inclusion compositions in the stainless steel and the crystallization of spinel have been investigated using XRD, SEM-EDS, and an image analyser. The solidification mode and the phase equilibria were computed by employing thermochemical software. The liquidus temperature of the oxides containing 5% CaF2 increases with increasing alumina content from 10% to 30%, while the solidus temperature has little dependence on alumina content. The size of spinel crystals in the final microstructure increases on increasing the content of alumina, resulting from that the oxides spending more time at higher temperatures below the liquidus temperature, where crystal growth is generally faster than nucleation, during slow cooling. The liquidus temperature of the oxides containing 30% Al2O3 is scarcely varied, while the solidus temperature decreases by increasing the content of CaF2 to 10%. The size of spinel crystals decreases as the content of CaF2 increases, resulting from the fact that the oxides could spend more time at relatively lower temperatures, where nucleation is faster than growth, during the cooling process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Calphad - Volume 31, Issue 4, December 2007, Pages 428–437
نویسندگان
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