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The structure of SiC‐reinforced Mg casting alloys
Author(s) -
Yang W.,
Weatherly G. C.,
McComb D. W.,
Lloyd D. J.
Publication year - 1997
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.1997.1530711.x
Subject(s) - mischmetal , materials science , alloy , tetragonal crystal system , amorphous solid , magnesium , oxide , casting , electron diffraction , magnesium alloy , phase (matter) , chemical engineering , diffraction , metallurgy , composite material , crystallography , crystal structure , optics , chemistry , physics , organic chemistry , hydrogen storage , engineering
The nature of the interface and interfacial reaction products formed between SiC particles and magnesium has been studied in two SiC p ‐reinforced magnesium casting alloys, ZC63 and ZE63. In ZC63, a thin amorphous film was observed at the interface of the SiC particles. Energy‐dispersive X‐ray and electron energy‐loss spectroscopy methods were used to characterize the films. They were found to contain Si, O and Mg, with the Si tetrahedrally coordinated to the O. The alloy ZE63 contains Zr and mischmetal (Ce, La, Nd, Pr), all of which are strong oxide formers. In the as‐cast state, patches or continuous fine‐grained oxide films were found at the interface of the SiC reinforcing phase in this alloy. Electron diffraction was used to identify these oxides as the tetragonal form of ZrO 2 and cubic CeO 2 .