کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5460874 | 1516200 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of critical current density by a “MgB2-MgB4” reversible reaction in self-sintered ex-situ MgB2 bulks
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Enhancement of critical current density by a “MgB2-MgB4” reversible reaction in self-sintered ex-situ MgB2 bulks Enhancement of critical current density by a “MgB2-MgB4” reversible reaction in self-sintered ex-situ MgB2 bulks](/preview/png/5460874.png)
چکیده انگلیسی
Self-sintered ex-situ MgB2 polycrystalline bulks have experienced a two-step sintering process, initially at 900 °C for 0-20 min and then at 650 °C for 1 h. MgB2 was decomposed to MgB4 and Mg at 900 °C and composed again at 650 °C from MgB4 and Mg. The reversible reaction promotes the material migration, and thus eliminates pores and enhances the connectivity between the grains. The critical current density (Jc) is significantly improved due to both improved grain connectivity and the additive pinning centers such as MgB4 and new-born boundaries. This two-step sintering process can be a promising method to fabricate high-performance ex-situ MgB2 bulks and wires.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 694, 15 February 2017, Pages 24-29
Journal: Journal of Alloys and Compounds - Volume 694, 15 February 2017, Pages 24-29
نویسندگان
Junming Peng, Qi Cai, Fang Cheng, Zongqing Ma, Chong Li, Ying Xin, Yongchang Liu,