• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Growth mechanism of an icosahedral quasicrystal and solute partitioning in a Mg-rich Mg-Zn-Y alloy
【24h】

Growth mechanism of an icosahedral quasicrystal and solute partitioning in a Mg-rich Mg-Zn-Y alloy

机译：富镁Mg-Zn-Y合金中二十面体准晶体的生长机理及溶质分配

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The growth mechanism of an icosahedral quasicrystal and solute partitioning in a Mg-rich Mg-Zn-Y alloy were investigated. It is found that the preferred growth directions of the icosahedral quasicrystalline phase (Ⅰ-phase) are along 5-fold axes and the planes perpendicular to the 5-fold axes grow in a facet manner. Due to the local compositional change at the solid/ liquid interface, the planar growth is gradually replaced by cellular growth. During the nucleation of the primary Ⅰ-phase, on a microscale, the distribution of the Y element is changed and concentrated along 5-fold directions in the remaining liquid. If the cooling rate is relatively slow, there will be more Y element in the remaining liquid after the formation of the primary Ⅰ-phase. It causes that (Ⅰ-phase + α-Mg) eutectic structures form around the primary Ⅰ-phase. Almost all the Y element is exhausted after this stage. Especially, under a relatively slow cooling rate, the solute partitioning occurs during the growth process of the primary Ⅰ-phase, which leads to the microshrinkage cavity and crack defects at the edge of the primary Ⅰ-phase.
机译：研究了富镁Mg-Zn-Y合金中二十面体准晶体的生长机理和溶质分配。发现二十面体准晶相（Ⅰ相）的优选生长方向沿5倍轴，且垂直于5倍轴的平面成小平面生长。由于固/液界面处的局部组成变化，平面生长逐渐被细胞生长所取代。在一级Ⅰ相成核过程中，Y元素的分布发生了变化，并在剩余的液体中沿5倍方向集中。如果冷却速度相对较慢，则在形成初级Ⅰ相后，剩余液体中就会有更多的Y元素。导致在初级Ⅰ相周围形成（Ⅰ相＋ α－Mg）共晶结构。在此阶段之后，几乎所有的Y元素都被耗尽。特别是在相对较慢的冷却速度下，溶质在第一相的生长过程中发生了分配，这导致了第一相边缘的微缩腔和裂纹缺陷。

著录项

  • 来源
    《Journal of Materials Research》 |2014年第8期|942-949|共8页
  • 作者

    Jiwei Geng; Xinying Teng; Guorong Zhou; Degang Zhao; Jinfeng Leng;

  • 作者单位

    School of Materials Science and Engineering, University of Jinan, Jinan 250022, People's Republic of China;

    School of Materials Science and Engineering, University of Jinan, Jinan 250022, People's Republic of China;

    School of Materials Science and Engineering, University of Jinan, Jinan 250022, People's Republic of China;

    School of Materials Science and Engineering, University of Jinan, Jinan 250022, People's Republic of China;

    School of Materials Science and Engineering, University of Jinan, Jinan 250022, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号