Funct. Mater. 2021; 28 (2): 275-278.

doi:https://doi.org/10.15407/fm28.02.275

Fabrication and mechanical properties of (SiCw + SiCnp)/SiC layered ceramic composites

Yupeng Xie, Jun Xu

School of Science, Jilin Institute of Chemical Technology, Jilin, 13200 Jilin, China

Abstract: 

(SiCw + SiCnp)/SiC layered ceramic composites with different ratios of SiC whiskers and SiC nano-particles were fabricated by tape casting and hot-pressing sintering; the mechanical properties and microstructure of the composites were investigated. The ratio of SiC whiskers and SiC nano-particles significantly influences on relative density and mechanical properties of the composites. The flexural strength and fracture toughness can reach the highest values of 455 MPa and 5.50 MPa·m1/2, respectively, with the ratio of 8. The strength/toughness of the composites can be increased by introduction of SiC nano-particles in the layered structure. Crack deflection, crack bridging, and pullouts of whiskers can be observed in the fracture surfaces.

Keywords: 
layered ceramic composites, SiC whisker, SiC nano-particle, mechanical properties.

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