Toughened ZrB2-based ceramics through SiC whisker or SiC chopped fiber additions

By L. Silvestroni, D. Sciti, C. Melandri, Stefano Guicciardi. 2010

205 citations recorded by the source corpus.

Abstract In order to improve the fracture toughness, SiC whiskers or SiC chopped fibers were added to a ZrB 2 matrix in volumetric fraction of 10 and 20 vol.%. The composites were hot-pressed between 1650 and 1730 °C and their final relative densities were higher than 95%. Even at the lowest sintering temperature, the whiskers showed an evident degradation. On the other hand, the fibers maintained their initial shape and a strong interface formed between matrix and reinforcement. The fracture toughness of the composites increased from 30 to 50% compared to the baseline material, with the fibers showing a slightly higher toughening effect. In the whiskers-reinforced composites, the room-temperature strength increased when 10 vol.% whiskers were added. In the fibers-reinforced composites, the room-temperature strength decreased regardless the amount of fibers added. The high-temperature strength of the composites was higher than that of the baseline material for both types of reinforcement.

Subfields: Ceramics and Composites, Civil and Structural Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/e80ae1eac21dfbac1af080108e02cfbf038c0aec

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In Ceramics and Composites

1. D. Lahiri
2. A. Nieto
3. A. Agarwal

In Mechanical Engineering

1. D. Lahiri
2. A. Nieto
3. A. Agarwal

Citations in the corpus

• Graphene NanoPlatelets reinforced tantalum carbide consolidated by spark plasma sintering (2013, background): “Elongated reinforcements such as SiC whiskers [38, 39], SiC chopped fibers [38-41], and carbon”