论文成果
Evolution of dendrite morphology of a binary alloy under an applied electric current: An in situ observation
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- 论文类型：期刊论文
- 发表时间：2010-04-01
- 发表刊物：PHYSICAL REVIEW E
- 收录刊物：SCIE、EI、PubMed、Scopus
- 文献类型：J
- 卷号：81
- 期号：4
- 页面范围：042601
- ISSN号：1539-3755
- 摘要：Synchrotron radiation imaging technique was used to in situ observe the dendrite growth of a solidifying Sn-Bi binary alloy under a direct current (dc) electric field. By applying a dc (7-32 A/cm(2)), the dendrite branching was suppressed, the dendrite tip was modified to be round or flat, and no tertiary dendrite was found. With increasing dc density, the dendrite morphology was changed from columnar dendritic to equiaxed cellular to equiaxed dendritic. In particular, the primary dendrite branched following a tip-split manner in a higher intensity dc. The influence of dc on the evolution of dendrite morphology was discussed.
