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Globular-to-needle Zn-rich phase transition during transient solidification of a eutectic Sn-9%Zn solder alloy

机译:共晶Sn-9%Zn焊料合金瞬态凝固过程中从针状到针状富锌的相变

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摘要

The aim of this article was to investigate the microstructural evolution of a eutectic Sn-9%Zn solder alloy as a function of growth rate during transient unidirectional solidification. It was found that globular-like and needle-like Zn-rich phases prevail at growth rates ranging from 0.5 to 2 mm/s and 0.3 to 0.1 mm/s, respectively, with a transition region occurring between these growth rate ranges. The microstructure control in soldering processes can be accomplished by manipulating solidification processing variables such as the cooling rate and the growth fate, smce the resulting morphological microstruclure depends on heat transfer conditions imposed by solidification, and as a direct consequence will affect the final properties.
机译:本文的目的是研究瞬态单向凝固过程中共晶Sn-9%Zn焊料合金的组织演变与生长速率的关系。发现球状和针状富Zn相分别以0.5至2mm / s和0.3至0.1mm / s的生长速率占优势,在这些生长速率范围之间出现过渡区域。焊接过程中的微结构控制可通过控制凝固过程变量(如冷却速率和生长命运)来完成,所得到的形态微结构取决于凝固所施加的传热条件,因此直接影响最终性能。

著录项

  • 来源
    《Materials Letters》 |2009年第15期|1314-1316|共3页
  • 作者单位

    Department of Materials Engineering, University of Campinas-UNICAMP, PO Box 6122-13083-970-Campinas, SP, Brazil;

    Department of Materials Engineering, University of Campinas-UNICAMP, PO Box 6122-13083-970-Campinas, SP, Brazil;

    Department of Materials Engineering, University of Campinas-UNICAMP, PO Box 6122-13083-970-Campinas, SP, Brazil;

    Department of Materials Engineering, University of Campinas-UNICAMP, PO Box 6122-13083-970-Campinas, SP, Brazil;

  • 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

    casting; thermal properties; solidification; microstructure;

    机译:铸件;热性能;凝固;微观结构;

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