National University of Science and Technology MISiS, Moscow, Russia:

S. S. Sarkisov, Senior Lecturer at the Department of Physics, e-mail: sarkfoil@yandex.ru

A study was conducted on the process of cold clad rolling by pre-pressing mechanically activated Al and Ni nanopowders in between the layers of aluminium foil resulting in the production of high-strength high-density reactive composite material. The authors examined the microstructure of transverse sections in the resultant specimens after the pre-pressing of mechanically activated Al and Ni nanopowders, as well as the following three passes of cold clad rolling in between the layers of aluminium foil. The authors applied the method of differential scanning calorimetry to analyse the reactivity of this material after each pass. Comparative data for the specimen are provided following the pre-pressing of mechanically activated Al – Ni nanopowders, and a relationship was analysed between the temperature and heating rate and the formation of the Al₃Ni, Ni₂Al₃ and NiAl phases. The resultant reactive material Al/Al – Ni/Al is of relatively high strength, which is indicated by the results of uniaxial tension tests and their comparison with the metals forming the Al and Ni composite material of the foil. The resultant reactive composite material can be used for welding and soldering of heterogenous materials, as a material initiating combustion in solid fuels, as well as for creating the foaming effect in porous composites.

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