Effects of CNTs content and milling time on mechanical behavior of MWCNT-reinforced aluminum nanocomposites

Metallurgical Challenges in Carbon Nanotube-Reinforced Metal Matrix Nanocomposites

“…) In summary, if the best equipment as well as better control over processing conditions is utilized to disperse CNTs among the metallic powders, each method has its own intrinsically certain ability, so that if the CNT loading exceeds the optimal value of each technique (4-5 wt % CNT at the best conditions), the nanotubes tend to form agglomeration. In this case, the pores and poor interfacial bonding can degrade the mechanical properties as well as thermal and electrical characteristics of manufactured CNT-containing metal matrix nanocomposites [86,87]. Consequently, many researchers believe that such a dispersion method and arbitrary practical conditions have low potential to uniformly disperse CNTs in metallic matrix.…”

“…In this case, the pores and poor interfacial bonding can degrade the mechanical properties as well as thermal and electrical characteristics of manufactured CNT-containing metal matrix nanocomposites [86,87]. Consequently, many researchers believe that such a dispersion method and arbitrary practical conditions have low potential to uniformly disperse CNTs in metallic matrix.…”

“…In this case, Al 4 C 3 can be formed when the energy state of the mixed powders reaches to a sufficiently high level. It is believed that the long-term milling process can seriously damage the CNTs structure and lead to the in situ formation of Al 4 C 3 [87,129]. For instance, Ostovan et al [87] evaluated the microstructure of the milled powders for 8 and 12 h. It was found that the needle-like Al 4 C 3 is just formed after the milling for 12 h. It was attributed to the long-term milling-induced damage in CNTs.…”

“…It is believed that the long-term milling process can seriously damage the CNTs structure and lead to the in situ formation of Al 4 C 3 [87,129]. For instance, Ostovan et al [87] evaluated the microstructure of the milled powders for 8 and 12 h. It was found that the needle-like Al 4 C 3 is just formed after the milling for 12 h. It was attributed to the long-term milling-induced damage in CNTs. As a basic conclusion, the possible CNT amorphization during the sintering process as well as the formation of crystallographic defects in CNTs can significantly facilitate the formation of Al 4 C 3 .…”

The Study of the Process of Mechanical Alloying of Aluminum by Nano-Dimensional Allotropic Modifications of Carbon

“…В частности, все большее примене-ние находят композиционные материалы этого класса на основе алюминия [1][2][3]. Они имеют благоприятное сочетание эксплуатационных свойств: конструкцион-ных, антикоррозионных и др.…”