摘要
Nitrides MAX have attracted ever-growing interest owing to its unique metallic and ceramic characteristics and properties.Here,we report on the synthesis of highly purified Ti_(2)AlN and Ti_(4)AlN_(3) powders from Ti,Al and TiN powders by a facile atmosphere sintering method.The obtained nitrides show highly pure phase and excellent layered structure.Except for the composition difference of raw materials,both the nitrides can be sintered and obtained by same sintering temperature and holding time,which thus makes less processing time and less usage of synthesis parameters as compared to previously synthesis methods.To our knowledge,present work is one of the few reports on synthesis of Ti_(4)AlN_(3) and Ti_(2)AlN using atmosphere sintering method.Furthermore,the lattice changes of the layered structure of Ti_(2)AlX(X/C=N)were studied by changing the composition of X position from the synthesis of Ti_(2)AlCN and Ti_(2)AlC,and the optimal formulation and synthesis mechanism of Ti_(4)AlN_(3) were also studied.
基金
This work was supported by the National Natural Science Foundation of China(61774122)
the Science and Technol-ogy Developing Project of Shaanxi Province(2015KW-001)
the 111 Project of China(B14040).
