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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2020, Vol. 34 
