کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8012223 | 1516940 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Two-step sintering of magnesium aluminate spinels and their corrosion in Na3AlF6-AlF3-CaF2-Al2O3 bath
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Two-step sintering of magnesium aluminate spinels and their corrosion in Na3AlF6-AlF3-CaF2-Al2O3 bath Two-step sintering of magnesium aluminate spinels and their corrosion in Na3AlF6-AlF3-CaF2-Al2O3 bath](/preview/png/8012223.png)
چکیده انگلیسی
New types of refractory materials need to be developed for designing the man-made ledge of the Hall-Héroult cell for aluminum electrolysis, which are currently constructed by frozen ledge. Magnesium aluminate spinel (MAS) as potential candidate materials was prepared by two-step sintering. The densification and grain growth of the MAS were investigated by the Archimedes drainage method and scanning electron microscope (SEM). All the specimens were corroded in a Na3AlF6-AlF3-CaF2-Al2O3 bath to assess the corrosion resistance. The results show that a MAS material with a high relative density of 99.2% and a homogeneous microstructure is achieved under two-step sintering conditions. The corrosion mechanisms of MAS in Na3AlF6-AlF3-CaF2-Al2O3 bath are mainly proposed by dissolution of MAS, formation of aluminum oxide, and diffusion of fluorides. The MAS prepared by two-step sintering exhibits good corrosion resistance to the Na3AlF6-AlF3-CaF2-Al2O3 bath.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 10, October 2016, Pages 2754-2761
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 10, October 2016, Pages 2754-2761
نویسندگان
Jian-hua LIU, Xiao-jun LÃ, Jie LI, Ling-yun HU, Liang-xing JIANG,