Abstract
Nano hafnium carbide (HfC) powders were synthesized by sol-gel combining high-temperature rapid heat treatment process using citric acid and hafnium tetrachloride as the raw materials. The effects of ball milling treatment on the phase and morphology of pyrolysis products (HfO2-C) and final HfC product were investigated and the influences of heat treatment temperature and holding time on the structure and properties of the synthesized hafnium carbide powders were also studied. The experimental results showed that the HfO2-C powders with good uniformity and small particle size were prepared by controlling the milling time. Pure HfC powders with an average particle size of 500 nm were obtained at 1 700 °C with a holding time of 3 min, and the oxygen content was about 0.69wt%, lower than that of the hafnium carbide powders prepared by SPS (0.97%).
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Funded by the National Key R&D Program of China (2017YFB0310400) and the National Natural Science Foundation of China (51672197)
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Wu, J., Wang, W. & Liu, C. Low-temperature Rapid Synthesis of Ultrafine Hafnium Carbide Ceramic Powders. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 843–848 (2018). https://doi.org/10.1007/s11595-018-1902-0
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DOI: https://doi.org/10.1007/s11595-018-1902-0