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Evidence of a novel intermetallic Mg 7 Ag 3 phase in Mg–Ag binary alloy system
Author(s) -
Ren Yuping,
Zhao Hong,
Wang Liqing,
Yang Bo,
Li Hongxiao,
Sun Shineng,
Pan Hucheng,
Qin Gaowu
Publication year - 2018
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s160057671800599x
Subject(s) - intermetallic , electron backscatter diffraction , orthorhombic crystal system , crystallography , materials science , crystal structure , alloy , transmission electron microscopy , electron diffraction , rietveld refinement , scanning electron microscope , phase (matter) , diffraction , analytical chemistry (journal) , chemistry , microstructure , metallurgy , nanotechnology , optics , physics , composite material , organic chemistry , chromatography
A novel intermetallic Mg 7 Ag 3 phase in the Mg–Ag binary alloy system at 573 and 623 K was discovered by the diffusion couple technique combined with the equilibrated alloy method. The composition and crystal structure of the Mg 7 Ag 3 phase were identified via scanning electron microscopy/energy dispersive spectrometry, X‐ray diffractometry (XRD), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The refinement of the XRD patterns was performed by Rietveld analysis. The XRD data have shown that Mg 7 Ag 3 crystallizes in a body‐centered crystal structure with Immm /orthorhombic symmetry (space group No. 71) and lattice parameters a = 14.2172, b = 14.6184, c = 14.177 Å and α = 90°. The well indexed selected area electron diffraction patterns and Kikuchi pattern obtained from TEM and EBSD confirmed the crystallographic structure obtained by XRD.