Abstract
In this work ultra-high temperature zirconium carbide (ZrC) powders were synthesized using sol-gel method combined with Spark plasma sintering (SPS). It can be concluded that SPS sintering for synthesis powder were both fast and efficient. Grain growth of ZrC particles could be also limited due to the fast heating rate. Temperature over 1700°C will lead to the fast formation of ZrC powder. Pure ZrC powders could be obtained with an grain size of 100-500nm at temperature of 1750°C for 5min. Due to the fast heating/cooling rate, long heat treatment period is significantly reduced and the grain size could be strongly suppressed.
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