Transmission electron microscopy investigations of the microstructures in rapidly solidified Mg-Sn ribbons. (December 2018)

• Record Type: Journal Article
• Authors: Ye, Li; Zhuang, Yuanlin; Zhao, Dongshan; Jia, Shuangfeng; Zhou, Jiaping; Gui, Jianian; Wang, Jianbo
• Is Part Of: Micron. Volume 115(2018)
• Page Start: 1
• Page End: 6
• Publication Date: 2018-12
• Subjects: Magnesium-tin based alloys -- Rapid solidification -- Precipitated phase -- High-resolution transmission electron microscopy; Microscopy -- Periodicals; Electron Probe Microanalysis -- Periodicals; Microscopy -- Periodicals; Microscopie -- Périodiques; Microscopy; Periodicals; 502.82
• DOI: 10.1016/j.micron.2018.08.002
• Languages: English
• ISSNs: 0968-4328

Abstract

Highlights: By rapid solidification technology, an Mg-9.76 wt.% Sn alloy with refined grains is achieved. It is confirmed that β ″ -Mg3 Sn phase exists in a DO19 structure in the rapid solidified Mg-9.76 wt.%Sn alloy. The orientation relationship of the β ″ -Mg3 Sn phase with the α -Mg matrix is confirmed and an atomic structure model of the β ″ -Mg3 Sn phase is proposed. Abstract: Ribbons of an Mg-9.76 wt.%Sn alloy have been fabricated using rapid solidification technology. X-ray diffraction and transmission electron microscopy confirm that the rapidly solidified ribbons consist of α -Mg, β -Mg2 Sn and β ″ -Mg3 Sn phases. The α -Mg grains are refined in the ribbons. The predominant fraction of the β -Mg2 Sn phase distributes at the grain boundaries of the α -Mg grains. The minor fraction of the β -Mg2 Sn phase reveals a spherical morphology with a typical grain size of 170 nm. The orientation relationship between the β ″ -Mg3 Sn particles and α -Mg matrix is identified in the ribbons and an atomic structure model of the β ″ -Mg3 Sn phase is proposed.