کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438552 1398185 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Wettability between Fe-Al alloy and sintered MgO
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Wettability between Fe-Al alloy and sintered MgO
چکیده انگلیسی
In the current study, the wettability between Fe-Al alloy and sintered MgO substrate was investigated. The stable contact angle between the sintered MgO substrate and the liquid iron was approximately 134° at 1550 °C, hardly influenced by Al concentrations of 18 ppm and 370 ppm in the liquid iron. By changing hydrogen partial pressure from 0 vol% to 1 vol%, the oxygen partial pressure decreased. Meanwhile, the contact angle between the MgO substrate and the liquid iron with 370 ppm Al increased with the decrease of oxygen partial pressure. The oxygen partial pressure and contact angle were scarcely affected by increasing hydrogen partial pressure from 1 vol% to 5 vol%. In all cases with 370 ppm Al in the liquid iron, oxide layers were detected on the surface of iron samples. The oxidation of iron could be effectively prevented by increasing the hydrogen partial pressure. The MgO substrate was reduced to Mg vapor in the reducing atmosphere at a high temperature. Then the Mg vapor was dissolved into the iron even before iron melting. Under thermodynamic equilibrium condition, an oxide layer containing two components, i.e. MgO·Al2O3 phase and CaO-SiO2-MgO-Al2O3 phase, was generated on the surface of the iron sample. Due to the different wettability between the iron and the two phases, MgO·Al2O3 phase was repelled, while the CaO-SiO2-MgO-Al2O3 phase adhered to the inside area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 10, July 2017, Pages 7674-7681
نویسندگان
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