TY - JOUR
T1 - Effects of binder addition on the mechanical properties of bulk Y-Ba-Cu-O superconductors
AU - Seki, H.
AU - Wongsatanawarid, A.
AU - Kobayashi, S.
AU - Ikeda, Y.
AU - Murakami, M.
PY - 2010/11/1
Y1 - 2010/11/1
N2 - We studied the effects of binder addition on the mechanical properties of bulk Y-Ba-Cu-O superconductors. We prepared YBa2Cu3O y, Y2BaCuO5 powders and polyvinyl alcohol mixed with water as a binder. These raw materials were mixed, and the binder-added powders were pressed into pellets. The hardness of the green compacts with binder is higher than that without the binder. However, the hardness of green compacts with 8% binder is the same as that with 4% binder. The maximum compression strength of the precursor with binder is higher than that without binder. Equally, the maximum strength of the green compacts with 8% binder is higher than that with 4% binder. The differential thermal analysis measurements showed that the exothermic reaction due to the decomposition of the organic binder started at 550 °C and gradually proceeded with further heating. After de-binder treatment, BaCO3 powders were produced on the green compacts. The green compacts were subjected to melt-processing. We also measured trapped magnetic fields of binder-added bulk Y-Ba-Cu-O superconductors with a Hall probe scanning device. Trapped magnetic field of the bulk added with 4% is higher than that of the binder-free bulk. Hence, Y-Ba-Cu-O bulk with suitable amount of binder shows good influence for mechanical strength and trapped magnetic field.
AB - We studied the effects of binder addition on the mechanical properties of bulk Y-Ba-Cu-O superconductors. We prepared YBa2Cu3O y, Y2BaCuO5 powders and polyvinyl alcohol mixed with water as a binder. These raw materials were mixed, and the binder-added powders were pressed into pellets. The hardness of the green compacts with binder is higher than that without the binder. However, the hardness of green compacts with 8% binder is the same as that with 4% binder. The maximum compression strength of the precursor with binder is higher than that without binder. Equally, the maximum strength of the green compacts with 8% binder is higher than that with 4% binder. The differential thermal analysis measurements showed that the exothermic reaction due to the decomposition of the organic binder started at 550 °C and gradually proceeded with further heating. After de-binder treatment, BaCO3 powders were produced on the green compacts. The green compacts were subjected to melt-processing. We also measured trapped magnetic fields of binder-added bulk Y-Ba-Cu-O superconductors with a Hall probe scanning device. Trapped magnetic field of the bulk added with 4% is higher than that of the binder-free bulk. Hence, Y-Ba-Cu-O bulk with suitable amount of binder shows good influence for mechanical strength and trapped magnetic field.
KW - Binder
KW - Bulk
KW - Hardness
KW - Mechanical strength
KW - Trapped magnetic field
KW - Y-Ba-Cu-O
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U2 - 10.1016/j.physc.2010.05.068
DO - 10.1016/j.physc.2010.05.068
M3 - Article
AN - SCOPUS:77957917244
SN - 0921-4534
VL - 470
SP - 1177
EP - 1180
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 20
ER -