Origin of subgrain structure within a domain in melt-processed YBa{sub 2}Cu{sub 3}O{sub 7}
Origin of subgrain structure within a domain in melt-processed YBa{sub 2}Cu{sub 3}O{sub 7}
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熔融加工 YBa{sub 2}Cu{sub 3}O{sub 7} 域内亚晶结构的起源
DOI：
10.1103/physrevb.55.14160
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发表时间：
1997
影响因子：
3.7
通讯作者：
T. Rajasekharan
中科院分区：
文献类型：
--
作者：
E. S. Reddy;T. Rajasekharan
用偏振光光学显微镜研究了不同冷却速率下熔体加工的YBa{sub 2}Cu{sub 3}O{sub 7}的显微组织。目前的研究主要集中在区域内亚晶结构的起源，这在文献中存在争议，由于固态或结晶过程中的多角化过程。本研究有力地支持了亚晶粒是由熔体结晶过程中的凝固不稳定性造成的，而不是由固态的多角化过程造成的。{版权所有}{ital 1997} {ital美国物理学会}
The microstructures of melt-processed YBa{sub 2}Cu{sub 3}O{sub 7} with different cooling rates were studied by polarized light optical microscope. The present study concentrated mainly on the origin of subgrain structure within domains, where there exist controversies in the literature, as due to the polygonization process in the solid state or during the crystallization process. The present study strongly supports the view that subgrains result from the solidification instabilities during crystallization from the melt rather than due to the polygonization process in the solid state. {copyright} {ital 1997} {ital The American Physical Society}