Effect of cooling rate on evolution of superconducting phases during decomposition and recrystallization of (Bi,Pb)-2223 core in Ag-sheathed tape

作     者：LI Jingyong LI Jianguo ZHENG Huiling LI Chengshan LU Yafeng ZHOU Lian 

作者机构：Advanced Welding Technology Provincial Key Laboratory Jiangsu University of Science and Technology Zhenjiang 212003 China Northwest Institute for Nonferrous Metal Research Xi''an 710016 China Advanced Welding Technology Provincial Key Laboratory Jiangsu University of Science and Technology Zhenjiang 212003 China Northwest Institute for Nonferrous Metal Research Xi''an 710016 China Northwest Institute for Nonferrous Metal Research Xi''an 710016 China Northwest Institute for Nonferrous Metal Research Xi''an 710016 China Northwest Institute for Nonferrous Metal Research Xi''an 710016 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2006年第25卷第z1期

页      面：400-404页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：(Bi,Pb)-2223/Ag tape cooling rate decomposition and reformation 

摘      要：The reformation of (Bi,Pb)-2223 from the liquid or melt is very important for a melting process of (Bi,Pb)-2223 tape. By combination of quenching experiment with X-ray diffraction (XRD) analysis, the effect of cooling rate on the evolution of three superconducting phases in the (Bi,Pb)-2223 core of Ag-sheathed tape was investigated. The results show that (Bi,Pb)-2223 reformation from the melt seems to experience different routes during slowly cooling at different rates. One is that (Bi,Pb)-2223 phase reformed directly from the melt, and no Bi-2212 participate in this process. The other is that (Bi,Pb)-2223 is converted from the intermediate product, Bi-2212, which formed from the melt during the first cooling stage. Due to the inherent sluggish formation kinetics of (Bi,Pb)-2223 from Bi-2212, only partial (Bi,Pb)-2223 can finally be reformed with the second route.