Disorder trapping and formation of antiphase nanodomains in Ni3Sn: In situ observation and high resolution characterization

Rijie Zhao, Tingting Yang, Yeqing Wang, Yang Ren, Jianrong Gao*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

9 Citations (Scopus)

Abstract

Rapid solidification of the intermetallic Ni3Sn compound from an undercooled liquid was investigated using time-resolved synchrotron X-ray diffraction. Primary growth of an ordered and a disordered cubic solid was observed in situ at a low and a high undercooling, respectively. The disordered cubic solid was reordered after rapid solidification and experienced a solid-state transformation in cooling. A HRTEM study revealed high density of crystal defects and nanodomains in the transformed matrix. A HAADF-STEM study determined that the nanodomains are antiphase domains with chemical disorder. These observations indicated a possibility of online control of mechanical properties in additively manufactured intermetallics.
Original languageEnglish
Pages (from-to)55-58
JournalScripta Materialia
Volume193
Online published28 Oct 2020
DOIs
Publication statusPublished - 1 Mar 2021
Externally publishedYes

Research Keywords

  • Antiphase domains
  • HAADF
  • Intermetallics
  • Rapid solidification
  • X-ray diffraction

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