| Effects of Raw Materials on Synthesis, Microstructure
and Properties of MoSi2-10 Vol% SiC Composites |
Qiong Lu, Gaoming Zhu, Xiaohong Wang*, Zhang Wang and Peizhong Feng
page : 33-39
DOI : 10.1080/0371750X.2016.1147376 |
| Abstract |
| MoSi2-10 vol% SiC composites have been prepared in situ by self propagating
combustion synthesis from three different composite systems: Mo-Si-C, Mo-Si-Mo2C
and Mo-Si-SiC. The combustion synthesis temperatures were all above 1800 K and
the products were composed of MoSi2, SiC and trace Mo5Si3. MoSi2 and MoSi2-10
vol% SiC composites were consolidated by vacuum hot-pressing at 1400oC to produce
monoliths with high density. A uniform dispersion of SiC particles was obtained in
MoSi2 matrix composites. MoSi2-10 vol% SiC composites prepared by Mo-Si-SiC raw
materials exhibited excellent mechanical properties: Vickers hardness 12.21 GPa,
bending strength 773.4 MPa and fracture toughness 3.65 MPa m1/2.
[Keywords: Composites, Silicides, Combustion synthesis, Hot pressing, Mechanical
properties] |
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