Development of new Al-based nanocomposites by mechanical alloying

Characterization investigations of a mechanically alloyed and sintered Al–2wt%Cu alloy reinforced with WC particles

“…1 that Al peaks are broadened with the increase in MA time since the continuous deformation of powders during MA process results in crystallite refinement and increase in lattice strain [3,5,12,15,19,22]. Fig.…”

“…Up to date, a wide range of reinforcements have been used to produce Al-based MMCs with MA method such as carbides (SiC, B 4 C, VC, TiC, Al 3 C 4 ) nitrides (AlN, Si 3 N 4 ), borides (TiB 2 ) and oxides (Al 2 O 3 , SiO 2 ) [2][3][4][5][6][8][9][10][11][12][13][15][16][17][18]. Furthermore, MA technique has been applied to prepare supersaturated (Al-Cu), amorphous (Al-Fe and Al-C) or metastable crystalline alloys and nanocomposite alloys (Al-Mg, Al-Mg-Zr and Al-Ni-Mg-(Cu)) [19][20][21][22][23]. The common feature in these studies is the use of lightweight reinforcements in high amounts.…”

Synthesis of nanocomposites by mechanical alloying

“…These include homogeneous dispersion of graphite in an Al6061 alloy matrix [8], dispersion of Pb in Al-Cu alloys [9], effect of clustering of the reinforcement on the mechanical properties of the composites [10], synthesis of amorphous + intermetallic composites in Al-Mg alloys [11], dispersion of a high volume fraction of Ti 5 Si 3 in ␥-TiAl [12,13], among others. This paper describes the results obtained on the homogeneous dispersion of the second phases, which are of nanometer dimensions, and consequent improvement in the mechanical behavior of such composites.…”

Microstructural and mechanical properties of Al–Mg/Al2O3 nanocomposite prepared by mechanical alloying

“…Also, the addition of Cu, Mg and Si into Al matrix improves the mechanical properties caused by solid solution and age hardening [3]. Al-Mg alloys because of their high specific strength (strength to weight ratio) are used as matrix in Al-based nanocomposites [4,5]. Mechanical alloying has been used previously for the preparation of a range of Al-Mg alloys with bulk Mg concentrations varying from 3 to 70 at.% [4][5][6][7][8][9][10][11][12].…”

“…Al-Mg alloys because of their high specific strength (strength to weight ratio) are used as matrix in Al-based nanocomposites [4,5]. Mechanical alloying has been used previously for the preparation of a range of Al-Mg alloys with bulk Mg concentrations varying from 3 to 70 at.% [4][5][6][7][8][9][10][11][12]. The equilibrium solid solubility of Mg in Al at room temperature is only about 1 at.% [13], indeed, the solubility of Mg in aluminum has been increased substantially by the mechanical alloying process [6][7][8][9][10].…”