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ZrC Based Ceramics by High Pressure High Temperature SPS Technique

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Abstract:

Zirconium carbide based materials were consolidated via spark plasma sintering and high-pressure high-temperature (HPHT) sintering methods. Fully dense ZrC-TiC compacts were produced by HTHP SPS technique at 1600-1700°C and were characterized by 370 GPa and 23.7 GPa values of Young’s modulus and Vickers microhardness, respectively. By the addition of 2 wt.% silicon nitride, the compacts of a full density were obtained at 1600°C; however, the further addition of Si3N4 resulted in a decrease in both density and hardness. Oxidation behavior in air of the ZrC-TiC and ZrC-TiC-Si3N4 compacts was explored by high temperature XRD method showing intensive oxidation at ~1000°C. Microstructural analysis certified that the addition of certain amount of Si3N4 increases the phase distribution homogeneity and contributes to the microstructure refinement.

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Periodical:

Key Engineering Materials (Volume 799)

Pages:

125-130

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.799.125

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Online since:

April 2019

Authors:

Sofiya Aydinyan*, Tatevik Minasyan, Le Liu, Slawomir Cygan, Irina Hussainova

Keywords:

High-Pressure High-Temperature Spark Plasma Sintering, Mechanical Properties, Microstructure, ZrC Based Ceramics

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