caa a22 4500 388020806 CHVBK 20180307124924.0 cr unu---uuuuu 161130e199803 xx s 000 0 eng 10.1557/JMR.1998.0072 doi S0884291400043090 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0072 Solidification of YBa2Cu3O6+δ: Part I. Morphology [Elektronische Daten] A new quenching technique was used for detailed microstructural examination of quenched YBa2Cu3O6+δ/liquid interfaces. The examination revealed that the growth rate and the amount of excess Y2BaCuO5 (211) had a strong influence on the growth morphology of YBa2Cu3O6+δ (123). The maximum growth rate at which single crystal growth could be obtained increased from 1 μm/s to 1.5 μm/s as excess 211 content increased from 0 to 20 wt. %. It then decreased to 1 μm/s as excess 211 increased to 40 wt. %. Dendritic growth with distinguishable secondary arms occurred for stoichiometric 123 samples in the regime of cellular/dendritic growth. A highly curved 123 envelope was formed on 211 particles located at the 123 growth interface for stoichiometric 123 samples in the regime of single crystal growth. The microscopic 123 growth interface became flat as excess 211 content increased to 20 wt. %. The engulfment of 211 particles into 123 matrix is discussed based on detailed microstructural examination. It is found that the formation of a small highly curved 123 envelope on 211 particles for stoichiometric 123 samples is due to the large 211 particle spacing. Copyright © Materials Research Society 1998 Shen Hua Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Flemings Merton C. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Cima Michael J. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Haggerty John Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Honjo Shoichi Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Rigby Karina Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Sung Tae Hyun Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Journal of Materials Research Cambridge University Press 13/3(1998-03), 565-573 0884-2914 13:3<565 1998 13 JMR https://doi.org/10.1557/JMR.1998.0072 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0072 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shen Hua Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Flemings Merton C. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Cima Michael J. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Haggerty John Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Honjo Shoichi Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Rigby Karina Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Sung Tae Hyun Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/3(1998-03), 565-573 0884-2914 13:3<565 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge