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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
View graph of relations

Author(s)

  • Rijie Zhao
  • Tingting Yang
  • Yeqing Wang
  • Yang Ren
  • Jianrong Gao

Detail(s)

Original languageEnglish
Pages (from-to)55-58
Journal / PublicationScripta Materialia
Volume193
Online published28 Oct 2020
Publication statusPublished - 1 Mar 2021
Externally publishedYes

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.

Research Area(s)

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