Abstract
This work compared phase composition, microstructures and mechanical properties of ZrB 2—20 vol.% SiC—5 vol.%Yb 2O 3 prepared by hot pressing (HP) and spark plasma sintering (SPS) in vacuum. Despite the same raw material composition, the two densification techniques led to the appearance of different secondary phases. The HP ceramics had coarsened microstructure, predominantly intergranular fracture characteristic and high fracture toughness. The SPS ceramics exhibited refined microstructure, transgranular fracture model and high bending strength.
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Schedule a callMore From: International Journal of Refractory Metals and Hard Materials
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