Preparation of zirconium-based ceramic and composite fine-grained powders

Zirconium-based ceramics and composites such as ZrC, ZrB 2, ZrC–SiC, ZrB 2–SiC–ZrC, and ZrB 2–SiC–ZrC–ZrSi were synthesized in fine powder form via combustion synthesis (CS) using ZrSiO 4, Mg, C, B, and NaCl as raw materials. Temperature distributions in the combustion wave were measured by thermoco...

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Bibliographic Details
Published in:International journal of refractory metals & hard materials 2012, Vol.30 (1), p.133-138
Main Authors: Ryu, Hong Youl, Nersisyan, H.H., Lee, Jong Hyeon
Format: Article
Language:English
Subjects:
Ceramic powders
Ceramics
Combustion
Combustion synthesis
Combustion temperature
Fine powder
Moles
Particle size
Raw materials
Temperature distribution
Zirconium composite
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Summary:Zirconium-based ceramics and composites such as ZrC, ZrB 2, ZrC–SiC, ZrB 2–SiC–ZrC, and ZrB 2–SiC–ZrC–ZrSi were synthesized in fine powder form via combustion synthesis (CS) using ZrSiO 4, Mg, C, B, and NaCl as raw materials. Temperature distributions in the combustion wave were measured by thermocouples and used to estimate the combustion temperature and wave propagation velocity. The influence of the NaCl mole fraction on the combustion parameters, phase composition, and particle size of the composite powders was investigated. The experimental results revealed that the combustion temperature and particle size of the composites have a stable decreasing tendency with increase in the NaCl mole fraction in the starting mixture. It was found that near the combustion limit (1.5 mol NaCl), the combustion temperature drops below 1500 °C and the particle size reaches the nanometer scale. ►We synthesize Zr based ceramic and composite powders which have nanometer scale via combustion synthesis. ►We examine temperature distributions in the combustion wave to understand reaction mechanism. ►Increasing NaCl mole fraction decreases particle size of the composites. ►Particle size reaches the nanometer scale near the combustion limit.
ISSN:0263-4368
2213-3917
DOI:10.1016/j.ijrmhm.2011.07.015