کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458035 | 1516163 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvement of high temperature oxidation behavior of Cr3C2-20Â wt % Ni cermets by adding 1Â wt % Mo
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Cr3C2-20 wt % Ni cermets were prepared by Cr, C and Ni mixed powders using high energy milling and reactive sintering method comparing with the one contains 1 wt % Mo addition. Isothermal oxidation experiments were conducted at 800 °C in the static air from 10 h to 100 h using cyclic oxidation method. The high temperature oxidation behavior of Cr3C2-20 wt % Ni cermets effected by 1 wt % Mo addition was investigated. After 100 h oxidation, the oxidation weight increase and parabolic rate constants of the one with Mo decreased from 0.126 to 0.080 mg/cm2 and 4.41 Ã 10â12 to 1.78 Ã 10â12 kg2/m4·s, respectively. Generally, two positive effects were found by Mo additive, such as increasing the Cr atom concentration in the Ni and minimizing the formation of NiO during oxidation. The oxidation products of the cermets changed from forming the Cr2O3 and NiCr2O4 to that only forming Cr2O3 after adding molybdenum element. Pure Cr2O3 possessed better and denser crystal structure than that of NiCr2O4. The cermets were protected due to the formation of the dense oxide films on the surfaces of the substrates at high temperature. This novel mechanism was of academic influence and could serve as a guide for the further research on Cr3C2 - 20 wt % Ni cermets.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 731, 15 January 2018, Pages 271-278
Journal: Journal of Alloys and Compounds - Volume 731, 15 January 2018, Pages 271-278
نویسندگان
Wenyan Zhai, Yimin Gao, Liang Sun, Lin He, Yiran Wang,