کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7888260 | 1509794 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evolution mechanism of MgAlON in the Al-Al2O3-MgO composite at 1800 °C in flowing nitrogen
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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 Al-Al2O3-MgO composite was calcined at 1800 â in flowing nitrogen, using fused corundum, tabular alumina, activated α-Al2O3, high purity magnesia and metal aluminum powder as raw materials and magnesium aluminate sol as binding agent. The calcined sample was characterized and analyzed by XRD, SEM and EDS, and evolution mechanism of MgAlON was studied. Formation mechanism of MgAlON can be described as follows. At elevated temperatures in flowing nitrogen, Al(g)/Al2O(g) diffuses and transfers along pores or gaps in the Al-Al2O3-MgO composite, being nitrided as AlN, and then AlN reacts with Al2O3-rich spinel to form granular MgAlON. In gas-gas reaction system, Al(g)/Al2O(g), N2(g), Mg(g) and O2(g) react to form flake MgAlON.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 4, March 2018, Pages 3856-3861
Journal: Ceramics International - Volume 44, Issue 4, March 2018, Pages 3856-3861
نویسندگان
Mingwei Yan, Yong Li, Hongyu Li, Yang Sun, Haiyang Chen, Chenhong Ma, Jialin Sun,