Publication Date:
2016-11-09
Description:
Method of azide self-propagating high-temperature synthesis (SHS-Az), using sodium azide (NaN 3 ) as a nitriding reagent, was used for obtaining the nanopowder of aluminum nitride (AlN) from precursor that was sodium hexafluoroaluminate (Na 3 AlF 6 ). The product of burning the mixture of Na 3 AlF 6 + 3NaN 3 after water rinsing consisted of micro - and nanoparticles of AlN (65%) and the residue of salt Na 3 AlF 6 (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%Na 3 AlF 6 ), 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 c...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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