INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Rapid Synthesis and Layered Growth Mechanism of Ti2Al(C,N) Using g-C3N4 as Raw Material |
LI Xiaoxuan, ZHANG Qiang, ZHU Chuncheng
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College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China |
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Abstract Ti2Al(C,N) was prepared from Ti, Al and g-C3N4 powders by fast, low-energy self-propagating high temperature synthesis. When the molar ratio of Ti, Al and g-C3N4 is 2∶1.05∶1, the content of Ti2Al(C,N) is the highest. In the reaction, the melting of Al promotes the formation of Ti(C,N)(s) from Ti(s) and g-C3N4(s), Ti(s) and Al(l) form TiAl(s) at the cooling stage, followed by Ti(C,N)(s) and TiAl(s) are subjected to reaction to form a layered Ti2Al(C,N)(s). The study of the layered growth of Ti2Al(C,N) grains shows that Ti2Al(C,N) is a two-dimensional growth mechanism and grows in a step-like growth mode; the Ti2Al(C,N) large grain layers has an inward lateral spreading mode; the presence of small impurity particles hinders the lateral spreading of the Ti2Al(C,N) layer.
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Published: 15 January 2020
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About author:: Xiaoxuan Li, male, born in 1993, master student, mainly engaged in the preparation of ceramic matrix composites;Chuncheng Zhu, male, born in 1964, professor, master tutor, research direction is ceramic-based composite materials, presided over 2 projects of the Natio-nal Natural Science Foundation of China, presided over a number of provincial-level scientific research projects, and obtained more than 10 national authorizations. He has won the second prize of Heilongjiang Science and Technology and published more than 50 research papers. |
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