Peculiarities of chemical interaction of some carbon nanoreinforcements with aluminum matrix in metal matrix composite (MMC)

Abstract

The possibility of applying globular carbon for reinforcing the aluminum matrix when using mechanical alloying to produce composites was shown by investigating specific properties of chemical interaction of nanocarbon with the aluminum matrix. The structure of the initial particles of globular carbon and composite granules was studied. Mechanical alloying can significantly crush the initial particles of globular carbon. The use of the method of differential scanning calorimetry allowed the temperature of the start of the reaction between globular carbon nanoparticles and aluminum matrix with the formation of aluminum carbide to be determine as 320 °C-350 °C. Aluminum matrix composites with reinforcing particles of globular carbon can be used up to these temperatures without risk of the formation of aluminum carbide.

Decrease in the Starting Temperature of the Reaction for Fabricating Carbides of Refractory Metals When Using Carbon Nanoparticles as Precursors

“…That is why designing methods for fabricating carbides of various metals during the direct chemical reaction between the metal and carbon is a vital task. The opportunity to decrease the carbide synthesis temperature when using carbon nanoparticles as precursors has been studied in several works: articles show that the use of carbon nanoparticles (nanodiamonds [9,32], fullerenes, carbon onions [6], globular carbon [3]) in aluminum matrix composites leads to the synthesis of aluminum carbides at significantly lower temperatures than in the case of macro-materials: when fullerenes are used, the decrease reaches 350 • C. This effect was also investigated when using chromium as a composite matrix with nanodiamond reinforcing particles [33]. The temperature was reduced to 520 • C. Studies of using this effect for the synthesis of refractory metal carbides are important, since the existing methods of producing such carbides use high temperatures.…”

“…In recent years, interest in carbon nanoparticles and their applications in many fields of science and technology has grown [1][2][3][4]; examples include fullerenes and carbon onions [5][6][7]. There are many studies of detonation synthesis nanodiamonds [8][9][10][11].…”