Rapid monotectic solidification during free fall in a drop tube

Haipeng Wang, Chongde Cao, Bingbo Wei

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Droplets of Ni-31.4%Pb monotectic alloy with different sizes are rapidly solidified during free fall in a drop tube. The theoretical calculations indicate that the undercooling was achieved before solidification exponentially depends on droplet diameter. The maximum undercooling of 241 K (0.15T m) is obtained in the experiments. With the increase of undercooling, the volume fraction of monotectic cells increases, and the L2(Pb) grains are refined. Calculations of the nuclcation rates of L2(Pb) and α-Ni phases indicate that L2(Pb) phase acts as the leading nucleation phase during the monotectic transformation.

Original languageEnglish
Pages (from-to)220-224
Number of pages5
JournalChinese Science Bulletin
Volume49
Issue number3
DOIs
StatePublished - 2004

Keywords

  • Containerless processing
  • High undercooling
  • Low gravity
  • Monotectic solidification

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