Laminated Si3N4-Mo Composites Produced by Hot Pressing

doi:10.21203/rs.3.rs-60233/v1

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Laminated Si₃N₄-Mo Composites Produced by Hot Pressing

https://doi.org/10.21203/rs.3.rs-60233/v1

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In this paper, the physical, mechanical and friction behavior of Si₃N₄-Mo laminated composites were investigated. It can be found that the multilayer structure could improve the fracture toughness of laminated composite compared with pure Si₃N₄. Through the thermodynamic and kinetic calculations of chemical reactions, we conclude that the main product of the interface is Mo₅Si₃which caused poor physical and mechanical properties of Si₃N₄-Mo layered ceramics. The higher content of Mo was beneficial to hinder the diffusion of cracks and improved the fracture toughness of the material, but with the lower content of Mo, Si₃N₄-Mo laminated ceramic composite had better tribology properity . In addition, with the increase of the load, the tribology properity of Si₃N₄-Mo laminated ceramic composite decreased, and the friction mechanism of Si₃N₄-Mo/TC4 is a mixed wear of adhesive wear and abrasive wear.