Enhancement of critical current density by a “MgB₂-MgB₄” reversible reaction in self-sintered ex-situ MgB₂ bulks

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• 作者：Junming Peng^a ; Qi Cai^a ; Fang Cheng^a ; Zongqing Ma^a ; ^{mzq0320@163.com} ; Chong Li^a ; Ying Xin^b ; Yongchang Liu^a ; ^{licmtju@163.com}
• 关键词：MgB2 superconductor ; Reversible reaction ; MgB4
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：694
• 期：Complete
• 页码：24-29
• 全文大小：1717 K
• 卷排序：694

文摘

The Jc for ex-situ MgB2 bulks is improved by a “MgB2-MgB4” reversible reaction. The reversible reaction eliminates pores and thus promotes grain connectivity. New-born grain boundaries and MgB4 can serve as additive pinning centers.