Disorder trapping and formation of antiphase nanodomains in Ni3Sn: In situ observation and high resolution characterization. (1st March 2021)

• Record Type: Journal Article
• Authors: Zhao, Rijie; Yang, Tingting; Wang, Yeqing; Ren, Yang; Gao, Jianrong
• Is Part Of: Scripta materialia. Number 193(2021)
• Page Start: 55
• Page End: 58
• Publication Date: 2021-03-01
• Subjects: Intermetallics -- Rapid solidification -- X-ray diffraction -- HAADF -- Antiphase domains; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.10.037
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Rapid solidification of the intermetallic Ni3 Sn 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. Graphical abstract: Image, graphical abstract