Microstructure characteristics of FeMo–Sialon ceramic composite

A new metal–Sialon based ceramic composite of FeMo–Sialon has been processed using Si 3N 4, α-Al 2O 3 and FeMo70 alloy powders as the main raw materials. To explain why this composite has excellent mechanical properties, microstructure characterizations are carried out using the transmission electro...

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Bibliographic Details
Published inMaterials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 528; no. 4; pp. 2196 - 2199
Main Authors Yang, Jing-Zhou, Huang, Zhao-Hui, Hu, Xiao-Zhi, Fang, Ming-Hao, Liu, Yan-Gai, Huang, Jun-Tong
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier B.V 25.02.2011
Elsevier
Subjects
Ceramics
Composites
Cross-disciplinary physics: materials science; rheology
Crystals
Disilicides
Electron microscopy
Exact sciences and technology
FeMo–Sialon
Ferrous alloy
Intermetallic compounds
Intermetallics
Iron compounds
Materials science
Microstructure
Physics
Semiconductors
Silicides
Specific materials
Composites
FeMo–Sialon
Ceramics
Electron microscopy
Ferrous alloy
Grain boundaries
Ceramic matrix composite
Inorganic compounds
FeMo-Sialon
Mechanical properties
Iron alloys
Dispersion reinforced material
SAED
Amorphous phase
Composite materials
Transmission electron microscopy
Sialon
Microstructure
Molybdenum alloys
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Summary:A new metal–Sialon based ceramic composite of FeMo–Sialon has been processed using Si 3N 4, α-Al 2O 3 and FeMo70 alloy powders as the main raw materials. To explain why this composite has excellent mechanical properties, microstructure characterizations are carried out using the transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The results show that FeMo, FeSi 2 and Mo have formed an alloy mixture of Mo–Fe–Si in the FeMo–Sialon ceramic composite. Elongated β-Sialon crystals, interlacing with each other, vary in size. The Y-SiAlON glass, as an inter-granular phase, surrounds the grain boundaries of β-Sialon crystals. Some of β-Sialon crystals are semi-surrounded by dumbbell-like Mo–Fe–Si particles. The good mechanical properties of FeMo–Sialon composite are greatly dependent on the elongated Sialon grains and Mo–Fe–Si particles with interlocking structures.
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ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2010.11.071