Effect of iron on mechanical activation and structural evolution of hematite–graphite mixture

Investigation on the Effects of Milling Atmosphere on Synthesis of Barium Ferrite/Magnetite Nanocomposite

“…Milling conditions and impact forces of balls has a stronger effect on graphite than barium ferrite and results in amorphization of this phase after a few hours of milling. Reduction of Fe 2 O 3 with graphite in the mechanical milling medium has been reported earlier [28]. Milling under air atmosphere postpones the reduction process.…”

Synthesis of Fe–TiC–Al2O3 hybrid nanocomposite via carbothermal reduction enhanced by mechanical activation

“…Consequently, h/d can be identified as a parameter of the mechanical activation of materials. With the use of this parameter, one can predict the kinetic behavior of the milled materials such as the reaction temperature [15]. In Fig.…”

“…In this method, during milling process, a portion of the energy of the ball mill is transferred to the powder causing reduction in the crystallite sizes in addition to increase in the crystal defects including dislocations, structural distortion and atom displacement. All the above bring about more activation of the material, which can greatly stimulate the kinetics of the reaction [13][14][15][16][17]. Several researchers have taken advantage of this method to raise the speed of leaching, thermal processes www.elsevier.com/locate/ceramint and carbothermal reduction of minerals [18].…”

“…Several researchers have taken advantage of this method to raise the speed of leaching, thermal processes www.elsevier.com/locate/ceramint and carbothermal reduction of minerals [18]. Final properties of the materials synthesized through this method are highly dependent upon the mechanical, physical and chemical characteristics of the raw materials and also the milling parameters such as the rotational speed, milling time, milling type, and atmosphere [15][16][17][18][19]. Pursuing previous studies [20], the feasibility of the synthesis of Fe-TiC-Al 2 O 3 hybrid nanocomposite via mechanical activation plus subsequent carbothermal reduction was investigated.…”

Microstructure characterization of nanocrystalline (Ti0.9W0.1) C prepared by mechanical alloying

“…According to Tahmasebi et al [29], during the impact event, the transferred energy from the balls to the powder mixture leads to an increase in microstrain and a decrease in crystallite size. Since the ratio ε Dv always increases by performing the milling, it could be used as a criterion for better understanding the mechanical activation.…”