caa a22 4500 388021004 CHVBK 20180307124924.0 cr unu---uuuuu 161130e199803 xx s 000 0 eng 10.1557/JMR.1998.0074 doi S0884291400043119 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0074 Formation mechanism of Y2BaCuO5 pattern in growing YBa2Cu3Oxgrains during melt-infiltration process [Elektronische Daten] When a melt of BaO and CuO mixture was infiltrated into sintered Y2BaCuO5(211) compact to form YBa2Cu3Ox(123) superconductor, butterfly-like plane patterns of 211-free regions were observed to form within growing 123 grains. In a 123 grain, the 211-free region was found to be a pair of vertex-shared pyramids and 211 entrapped region to be the rest of the bulk of the grain. An observation of patterns and cracks formed within 123 grains revealed the base of the pyramids to be (001) plane. The difference in entrapment, which depends on crystallographic planes and results in the formation of the pattern, was explained by the dihedral angles between 123 and 211. The dihedral angle between a - (or b-) plane and 211, which is believed to be greater than zero degree, might cause the entrapment of 211 particles in a [100] (or [010]) direction. In contrast, the dihedral angle of most probably zero degree between c-plane and 211 inhibited the entrapment. The observed shape of 211 particles in front of a-(or b-) and c-planes supports the above explanation of 211 entrapment to form the butterfly-like patterns. was explained by the dihedral angles between 123 and 211. The dihedral angle between a- (or b-) plane and 211, which is believed to be greater than zero degree, might cause the entrapment of 211 particles in a [100] (or [010[) direction. In contrast, the dihedral angle of most probably zero degree between c-plane and 211 inhibited the entrapment. The observed shape of 211 particles in front of a-(or b-) and c-planes supports the above explanation of 211 entrapment to form the butterfly-like patterns. Copyright © Materials Research Society 1998 Jee Young A. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yousong-gu, Taejon 305-701, Korea Kang Suk-Joong L. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yousong-gu, Taejon 305-701, Korea Chung Hyungsik Korea Institute of Machinery and Metals, 66, Sangnam-dong, Changwon 641-010, Korea Journal of Materials Research Cambridge University Press 13/3(1998-03), 583-588 0884-2914 13:3<583 1998 13 JMR https://doi.org/10.1557/JMR.1998.0074 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0074 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jee Young A. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yousong-gu, Taejon 305-701, Korea NATIONALLICENCE 700 1- Kang Suk-Joong L. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yousong-gu, Taejon 305-701, Korea NATIONALLICENCE 700 1- Chung Hyungsik Korea Institute of Machinery and Metals, 66, Sangnam-dong, Changwon 641-010, Korea NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/3(1998-03), 583-588 0884-2914 13:3<583 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge