Azide SHS of aluminium nitride nanopowder and its application for obtaining Al-Cu-AlN cast nanocomposite

International Conference and Youth Scientific School on "Materials and Technologies of New Generations in Modern Materials Science"

Titova, Y.V.^1 ; Sholomova, A.V.^1 ; Kuzina, A.A.^2 ; Maidan, D.A.^1 ; Amosov, A.P.^1

Samara State Technical University, 244 Molodogvardeyskaya Street, Samara

443100, Russia^1

Samara National Research University, 34 Moskovskoe Shosse, Samara

443086, Russia^2

关键词: Aluminum nitride (AlN);    Composite alloys;    ITS applications;    Micro and nano-particle;    Na3AlF6precursor;    Nano powders;    Reinforcing particles;    Self propagating high temperature synthesis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/156/1/012037/pdf
DOI  :  10.1088/1757-899X/156/1/012037

来源: IOP

【 摘 要 】

Method of azide self-propagating high-temperature synthesis (SHS-Az), using sodium azide (NaN3) as a nitriding reagent, was used for obtaining the nanopowder of aluminum nitride (AlN) from precursor that was sodium hexafluoroaluminate (Na3AlF6). The product of burning the mixture of Na3AlF6+ 3NaN3after water rinsing consisted of micro - and nanoparticles of AlN (65%) and the residue of salt Na3AlF6(35%). This product of SHS-Az was mixed with copper powder and pressed into a briquette of nanopowdery master alloy Cu- 4%(65%AlN+35%Na3AlF6), which was successfully introduced into aluminium melt at a temperature of 850°C. The salt Na3AlF6 in the product of combustion played a role of flux during introducing into the aluminum melt and was not included in the final composition of the composite alloy. The microstructure of the obtained cast composite aluminum alloy with the calculated composition of Al-1.2%Cu-0.035%AlN showed that the reinforcing particles of AlN of different sizes, including nanoparticles, were distributed mainly along the grain boundaries of the aluminum alloy.