Formation of immiscible alloy powders with egg-type microstructure

C. P. Wang, X. J. Liu, Ikuo Ohnuma, R. Kainuma, K. Ishida

Research output: Contribution to journalArticlepeer-review

250 Citations (Scopus)

Abstract

The egg-type core microstructure where one alloy encases another has previous[y been obtained during experiments in space. Working with copper-iron base alloys prepared by conventional gas atomization, we were able to obtain this microstructure under gravity conditions. The minor liquid phase always formed the core of the egg, and it sometimes also formed a shell layer. The origin of the formation of this core microstructure can be explained by Marangoni motion on the basis of the temperature dependence of the interfacial energy, which shows that this type of powder can be formed even if the cooling rate is very high.

Original languageEnglish
Pages (from-to)990-993
Number of pages4
JournalScience
Volume297
Issue number5583
DOIs
Publication statusPublished - 2002 Aug 9

ASJC Scopus subject areas

  • General

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