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The effect of mechanical properties on wear resistance of Si3 N4 – SiC composite materials with different portions of SiC strengthening phase was investigated. Properties of monolithic silicon nitride were compared to ceramic composites consisting of Si3 N4 matrix with 10 and 20 vol.% SiC. The SiC strengthening phase had a positive effect on the hardness of Si3 N4 – SiC ceramic composite materials...
The effect of sintering time on the chosen mechanical and tribological properties of silicon nitride (Si3N4) with 5 wt.% of yttrium aluminium garnet (Y3Al5O12) ceramics was investigated. The Si3N4 ceramics sintered for shorter time contained a larger portion of untransformed a-Si3N4 phase which has higher hardness compared to the tougher β-Si3N4 phase. The fracture toughness of Si3N4 ceramics increased...
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