TY - JOUR
T1 - Phase relations in the Nd-Ba-Cu-O system in reduced oxygen atmospheres
AU - Banzai, S.
AU - Osabe, G.
AU - Sakai, N.
AU - Otsuka, M.
AU - Murakami, M.
PY - 2000/6/1
Y1 - 2000/6/1
N2 - We have studied the quasi-binary phase diagrams along the line connecting NdBa2Cu3Oy and BaCuO2+w in reduced oxygen atmospheres: p(O2) = 10-3 and 10-2 atm. The nucleation and melt of NdBa2Cu3Oy (Nd123) in Ba-rich solvent were observed in situ using a laser scanning microscope in 1% O2 + Ar and 0.1% O2 + Ar. The liquidus and solidus lines of nearly stoichiometric Nd123 have been constructed. We have found that phase relations are quite different between 1% O2 + Ar and 0.1% O2 + Ar. In a 0.1% O2 + Ar environment BaCuO2+w undergoes incongruent melting. (BaCuO2+w → Ba2CuO3+2 + L → BaO + L) and Nd422 decomposes into the Nd2O3 phase.
AB - We have studied the quasi-binary phase diagrams along the line connecting NdBa2Cu3Oy and BaCuO2+w in reduced oxygen atmospheres: p(O2) = 10-3 and 10-2 atm. The nucleation and melt of NdBa2Cu3Oy (Nd123) in Ba-rich solvent were observed in situ using a laser scanning microscope in 1% O2 + Ar and 0.1% O2 + Ar. The liquidus and solidus lines of nearly stoichiometric Nd123 have been constructed. We have found that phase relations are quite different between 1% O2 + Ar and 0.1% O2 + Ar. In a 0.1% O2 + Ar environment BaCuO2+w undergoes incongruent melting. (BaCuO2+w → Ba2CuO3+2 + L → BaO + L) and Nd422 decomposes into the Nd2O3 phase.
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U2 - 10.1088/0953-2048/13/6/301
DO - 10.1088/0953-2048/13/6/301
M3 - Conference article
AN - SCOPUS:0033686431
SN - 0953-2048
VL - 13
SP - 633
EP - 636
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
IS - 6
T2 - The 2nd International Workshop on the Processing and Applications of Superconducting (RE)CBO Large Grain Materials
Y2 - 19 October 1999 through 22 October 1999
ER -