کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5492306 | 1525673 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The features of combustion synthesis of aluminum and carbon doped magnesium diboride
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report the results of synthesizing the MgB2-based material in the layerwise combustion and thermal explosion modes. For the initial temperature of 500â°C, the combustion temperatures in the layerwise combustion and thermal explosion modes are identical. The sample surface after the synthesis is coated with a friable white coating, up to 10â¯Âµm thick, consisting of whisker-like MgO crystals 1.5â¯Âµm long and 200â¯nm in diameter. It is possible to dope MgB2 with aluminum and carbon atoms. Time-resolved X-ray diffraction studies demonstrate that the (Mg,Al)B2 phase emerges without formation of any intermediate compounds. The absence of Al demonstrates that it is contained in MgB2. Aluminum and carbon doping of MgB2 alters the lattice parameters, while its structural type remains unchanged. Doping of MgB2 with carbon black is found to be a more effective method than graphite doping. Superconducting properties of the synthesized samples were studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica C: Superconductivity and its Applications - Volume 541, 15 October 2017, Pages 1-9
Journal: Physica C: Superconductivity and its Applications - Volume 541, 15 October 2017, Pages 1-9
نویسندگان
A.Yu. Potanin, D.Yu. Kovalev, E.A. Levashov, P.A. Loginov, E.I. Patsera, N.V. Shvyndina, K.S. Pervakov, V.A. Vlasenko, S.Yu. Gavrilkin,