Synthesis of a Ni-Al-C Composite with Multilayer Carbon Nanostructures by an Electrothermal Explosion under Pressure
A. V. Shcherbakov, A. E. Sychev
Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, 142432 Russia
Keywords: electrothermal explosion, structure formation, carbon films, intermetallic compounds
Abstract
A Ni-Al-C based composite material is synthesized by the method of electric thermal explosion under a pressure of 96 MPa. During an electrothermal explosion in a powder reaction medium (Ni + Al + C), a Ni and Al based melt is formed, in which carbon dissolves. It is shown that in the process of crystallization of the final product, carbon, due to low solubility in NiAl, is located on the surface of intermetallic grains of NiAl in the form of multilayer graphite nanofilms with a thickness of 50 ÷ 80 nm, filling the intergranular space. The microhardness of the synthesized material is 3.084 MPa.
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