کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5440970 | 1398241 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hot corrosion behaviour of barium-strontium aluminosilicates in a molten Na2SO4 environment
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The hot corrosion behaviour of barium-strontium aluminosilicates (B1âxSxAS) attacked by Na2SO4 was investigated in the temperature range from 900 to 1100 °C and the weight change was measured as a function of the corrosion time. The surfaces and cross-sections of the corroded samples were observed by scanning electron microscopy in backscattered electron mode and energy-dispersive X-ray spectroscopy. The phase composition was characterized by X-ray diffraction. The results indicate that the hot corrosion of B1âxSxAS by molten Na2SO4 was controlled by a diffusion-reaction mechanism. The strontium and/or barium cations diffused out of their aluminosilicate network, and the vacant sites were filled by sodium cations diffusing into the structure to form a NaAlSiO4 on the top. Due to their smaller radius, the strontium atoms showed a faster diffusion rate than the barium atoms. The corrosion depth significantly increased with the temperature and the strontium concentration in the B1âxSxAS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 2, February 2017, Pages 823-832
Journal: Journal of the European Ceramic Society - Volume 37, Issue 2, February 2017, Pages 823-832
نویسندگان
Fengrui Jiang, Laifei Cheng, Yiguang Wang, Xuanxuan Huang,