Microstructure and Mechanical Properties of SIC_P/MoSi₂ Composites Manufactured by In Situ Reaction and Hot Pressing

Abstract:

Pure MoSi₂ and MoSi₂ composites with different volume fraction of SiC particles were prepared by the technology of in situ reaction and hot pressing the pure powder of Mo, Si and C after alcohol mixing. The effects of in situ formed SiC particles on the microstructure, the flexural strength and fracture toughness of SiC_P/MoSi₂ composites were studied. The research shows the relative density, flexural strength and fracture toughness of the composites are increased compared with those of the pure MoSi₂ material. It is found that the in–situ formed SiC particles refine the MoSi₂ grains and eliminate the brittle SiO₂ glass phase. The strengthening mechanism of the composites is of the refinement of MoSi₂ grains,dispersion strengthening of the in–situ formed SiC particles and elimination of the brittle SiO₂ glass phase.

• Periodical: Advanced Materials Research (Volumes 341-342)
• Pages: 204-209
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.341-342.204
• Online since: September 2011
• Authors: Han Ying Wang, Gao Shan Ma, Yan Qing Yang
• Keywords: Hot-Pressing, In Situ Reaction, Mechanical Property, Microstructure, SiC_P/MoSi₂ Composites

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