Microstructure and kinetics of Cu/Y2O3-doped MgB2

Authors

Qi Cai, Tianjin UniversityFollow
Yongchang Liu, Tianjin University, Nankai University
Zongqing Ma, University of WollongongFollow
Zhiming Gao, Tianjin UniversityFollow
Liming Yu, Tianjin University

RIS ID

104954

Publication Details

Cai, Q., Liu, Y., Ma, Z., Gao, Z. & Yu, L. (2012). Microstructure and kinetics of Cu/Y2O3-doped MgB2. Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment, 33 (9), 7-12.

Abstract

Cu/Y 2O 3-doped MgB 2 samples with different Y 2O 3 content were prepared by traditional solid-state sintering method. The microstructure and phase composition of the material were analyzed by SEM and X-ray diffraction. The results show that layered structure only appeares in Cu/5%Y 2O 3-doped sample. The solid-solid reaction of this system is further investigated by kinetics analysis in terms of thermal analysis curves. Finally, the most appropriate mechanism function is ascertained to be Avrami-Erofeev, n=2, which means random nucleation followed by instantaneous growth of nuclei. The activation energy (E) and the pre-exponential factor (A) both trend to be stable at early stage and decrease at final stage.