Study of microstructure and interfaces in an aluminium–C60 composite material

Mechanical and Damping Properties of Fullerene-Dispersed AZ91 Magnesium Alloy Composites Processed by a Powder Metallurgy Route

“…44,51) For the case of weak bonding at the interface, interfacial slip may occur when the magnitude of the shear stress at the interface is sufficient to overcome frictional loads. In the present composites, the formation of the Al 4 C 3 phase observed in Al/C 60 composites processed by squeeze casting, 10) and the Al 4 C 3 or Al-C-O phases observed in carbon inoculated AZ91 alloy [52][53][54] may not be possible. This is because the processing temperature for the present study was low.…”

“…In structural materials, due to a nano-sized dispersion of fullerenes and CNTs, metallic alloys reinforced with these carbon materials are expected to offer attractive properties such as higher strength and damping capacity. 10) Though an increase in strength has been observed in fullerene-or CNTdispersed aluminum-matrix-composites, [11][12][13][14][15][16] their performance has not often been as good as had been expected. Moreover, the addition of these carbon materials generally drastically decreases the ductility of the composites.…”

Mechanical properties and microstructures of carbon nanotube-reinforced Al matrix composite fabricated by in situ chemical vapor deposition

“…Nevertheless, generally CVD-grown CNTs have a few defects and significant amorphous carbon coating on the tube surface, which means some graphitic prism planes are exposed to Al when they are used as reinforcements. The presence of defects along with this amorphous carbon build-up will promote the precipitation of Al 4 C 3 layer [12,20,21]. According to DSC analysis of Fig.…”

Al/C60 Nanocomposites Fabricated by High-Pressure Torsion

“…[2] The production of metal matrix composites (MMCs) reinforced with fullerenes has been a subject of numerous investigations in the recent years. [2][3][4][5] Several methods have been used for the fabrication of these composites including codeposition, [3] squeeze casting, [4] and powder metallurgy. [5] In these techniques, the materials are exposed to high temperatures for relatively long periods, which cause a deleterious chemical reaction between fullerenes and metal matrix due to high reactivity and large surface area of fullerenes.…”

“…[5] In these techniques, the materials are exposed to high temperatures for relatively long periods, which cause a deleterious chemical reaction between fullerenes and metal matrix due to high reactivity and large surface area of fullerenes. For instance, formation of Al 4 C 3 carbides has been reported during preparation of Al/ C60 composites, [4] which may act as the preferred regions for initiation and propagation of microcracks. Furthermore, the fullerene molecules are unstable in the matrix during processing at high temperatures.…”