Mechanical Alloying: Development of Microstructure and Alloying Mechanisms

Phase transformations study on Ni75Al25 and Ni50Al50 during mechanical alloying and sintering

“…These works show that the final structure obtained strongly depends on the milling process. Atzmon [1] established the occurrence of a self-sustaining reaction during ball milling for this system; this result was also confirmed by Cardellini et al [3] However, Zbiral et al [7] have proposed that, in general, alloying occurs by a diffusion mechanism of one element into the other but the mechanism is not totally clear. Paby and Murty [5] studying mechanical alloying of Ni 50 -Al 50 obtained evidence of formation of NiAl intermetallic compound after 8 h of milling but it was only after 20 h that the complete disappearance of elemental powders was observed.…”

“…Mechanical alloying has been successfully applied to Ni-Al alloys by a number of authors [1][2][3][4][5][6][7]. These works show that the final structure obtained strongly depends on the milling process.…”

Characterization investigations during mechanical alloying and sintering of Ni–W solid solution alloys dispersed with WC and Y2O3 particles

“…In addition to synthesizing equilibrium solid solutions, it has also been possible to synthesize non-equilibrium (metastable) supersaturated solid solutions by MA starting from blended elemental powders [17]. The equilibrium and non-equilibrium solubility of W in MA'd Ni-W alloys was reported by several researchers [18][19][20][21][22][23]. Aning et al [20] stated that if the W content is greater than about 28 at.%, amorphization of the powders occurs.…”

“…Non-equilibrium compositions of Ni-W alloys can be fabricated using electrodeposition technique and MA [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Synthesis of Ni-W alloys by electrodeposition was first reported by Yamasaki et al [6] and since then, there have been a quite number of studies which reported mechanical, tribological and chemical properties of the Ni-W alloys fabricated via electrodeposition with different W amounts and different deposition parameters [1,2,[6][7][8][9][10][11][12][13][14][15][16].…”

PbTe mechanosynthesis from PbO and Te

“…Because of this fact it is proposed in this paper, that MYS of the PbO-Te system could bring down the processing costs and time to produce PbTe. MYS produces nanometric materials, thus the design of the thermoelectric materials could be vastly improved [5][6][7].…”