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Microstructural and mechanical characterization of Al–MWCNT composites produced by mechanical milling

2008; Elsevier BV; Volume: 502; Issue: 1-2 Linguagem: Inglês

10.1016/j.msea.2008.10.047

1873-4936

R. Pérez-Bustamante, C.D. Gómez-Esparza, I. Estrada‐Guel, M. Miki-Yoshida, Liliana Licea‐Jiménez, Sergio Alfonso Pérez‐García, R. Martínez-Sánchez,

MXene and MAX Phase Materials

Novel Al-based nanocomposites reinforced with multi-walled carbon nanotubes were produced by mechanical milling. Next, pressure-less sintering at 823 K under vacuum and hot extrusion at 773 K were carried out. The interface between Al matrix and the multi-walled carbon nanotubes was examined using transmission electron microscopy. The values of yield strength (σy), maximum strength (σmax) and microhardness Vickers (HVN) of the composites were evaluated and reported as a function of carbon nanotubes content. The concentration of multi-walled carbon nanotubes has an important effect on the mechanical properties of the nanocomposite. Formation of aluminum carbide in the nanocomposites was observed. Possible strengthening mechanisms are presented and discussed.