In-situ synthesis of nanocrystalline TiC powders, nanorods, and nanosheets in molten salt by disproportionation reaction of Ti(Ⅱ) species
来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第2期
论文作者:Lingxu Yang Ying Wang Ruijia Liu Huijun Liu Xue Zhang Chaoliu Zeng Chao Fu
文章页码:173 - 180
摘 要:A high-efficiency method is developed to in-situ synthesize nanocrystalline TiC powders, nanorods, and nanosheets by using equimolar ratio of Ti powder and acetylene black, multiwalled carbon nanotubes(MWCNTs), and graphene, respectively, as precursor in eutectic Na Cl-KCl molten salt at 800–900℃ for 2–3 h. Higher temperature and longer duration are more beneficial for TiC preparation. In addition, mechanism of TiC formation was investigated by linear scan voltammetry. Results indicate that nanocrystalline TiC is in-situ synthesized by reaction between Ti atoms, which come from disproportionation reaction of Ti(Ⅱ) species in the molten salt, and C atoms on the surface of carbon sources.
Lingxu Yang1,2,Ying Wang1,2,Ruijia Liu1,2,Huijun Liu1,3,Xue Zhang1,Chaoliu Zeng1,3,Chao Fu3
1. Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences2. School of Materials Science and Engineering, University of Science and Technology of China3. Songshan Lake Materials Laboratory
摘 要:A high-efficiency method is developed to in-situ synthesize nanocrystalline TiC powders, nanorods, and nanosheets by using equimolar ratio of Ti powder and acetylene black, multiwalled carbon nanotubes(MWCNTs), and graphene, respectively, as precursor in eutectic Na Cl-KCl molten salt at 800–900℃ for 2–3 h. Higher temperature and longer duration are more beneficial for TiC preparation. In addition, mechanism of TiC formation was investigated by linear scan voltammetry. Results indicate that nanocrystalline TiC is in-situ synthesized by reaction between Ti atoms, which come from disproportionation reaction of Ti(Ⅱ) species in the molten salt, and C atoms on the surface of carbon sources.
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