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Microstructural Characterization of Sintered MoSi 2 /SiC P Composites
Author(s) -
Li Jie,
Yang G. Y.,
Zhu Jing,
Zhang L. Q.,
Yang W. Y.,
Sun Z. Q.
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01315.x
Subject(s) - materials science , microstructure , transmission electron microscopy , composite number , sintering , composite material , molybdenum , amorphous solid , carbon fibers , stacking , characterization (materials science) , scanning electron microscope , silicon , silicon carbide , high resolution transmission electron microscopy , crystallography , metallurgy , nanotechnology , chemistry , organic chemistry
A MoSi 2 /SiC P composite was synthesized by in situ reactive sintering of a mixture of molybdenum, silicon, and carbon powders. Its microstructural features were studied by X‐ray energy dispersive spectroscopy (EDS), conventional transmission electron microscopy (CTEM), and high‐resolution transmission electron microscopy (HREM). It was determined that the composite was composed of α‐MoSi 2 and β‐SiC. There were no specific orientation relationships between the MoSi 2 matrix and SiC P , because the MoSi 2 and SiC were formed at 1450°C by the reaction of solid Mo and C and liquid Si. The abrupt change occurring in the microstructure of the composite is explained by the presence of an interface between MoSi 2 and SiC P , where no observable SiO 2 amorphous layer or particles were found. Microtwins and stacking faults were frequently observed in {111} planes of SiC P .