Structural and magnetic properties of Co50Ni50 powder mixtures

Influence of Milling Time on Structural and Microstructural Parameters of Ni50Ti50 Prepared by Mechanical Alloying Using Rietveld Analysis

“…The as-obtained values of the crystallite size are in good agreement with the values previously reported on binary alloys prepared by MA [20,28,29].…”

“…Indeed, the Ti radius is slightly larger than that of Ni ( Ti = 0.176 nm > Ni = 0.149 nm), so the diffusion of Ti into Ni leads to the distortion of Ni crystal structure and hence further increase in the dislocations density. The as-obtained values of the dislocations density in the present work are comparable to the values observed in the binary Co 50 Ni 50 alloy synthesized by high energy ball milling [28].…”

“…Thus during the first stage of milling, ⟨ 2 ⟩ 1/2 of Ni-SS and Ti-SS reaches about 0.7% and 1.16% after 12 h, respectively. The increase of the microstrain can be due to the increase of dislocations density induced by severe plastic deformations [28]. For NiTi-martensite, ⟨ 2 ⟩ 1/2 increases to about 0.9%, after 48 h, and then decreases; this behavior may be explained by the fact that, beyond this time, the crystallite size reaches a stationary value.…”

“…In the literature, Rietveld's method was successfully adopted for the determination of microstructural parameters of various systems [28][29][30]. The aim of this research work is devoted to the investigation of milling time on structural and microstructural modifications occurring in mechanically alloyed Ni 50 Ti 50 powder mixture.…”

Investigation of the Structural and Magnetic Properties of the Cobalt-Nickel Alloys Fabricated in Various Electrolyte Solutions

“…It is suggested than in our experiments, the change in the coercivity values is caused by grain size change of the alloys. Co-Ni coatings with larger grain size values have lower coercivity values, as expected [35]. As shown in Fig.…”