Dynamics of Planetary Ball Milling: A comparison of computer simulated processing parameters with CuO/Ni displacement reaction milling kinetics

Dry mechanochemical synthesis of hydroxyapatites from DCPD and CaO: influence of instrumental parameters on the reaction kinetics

“…To treat our results we used only data from the mechanistic models. These models consider cold welding of powders in a ball mill (''local'' models) and the ball dynamics in a milling device (''global'' models) [12][13][14][15][16][17][18][19][20][21].…”

“…4 and 5 can be justified considering that (i) the reaction kinetics parameters k or 1=t f are in relation with the energy exchanged during shocks, (ii) this exchanged energy is proportional to the kinetic energy of the ball at the collision time, but not equal because collisions can be from frontal to tangential (impact mode or friction mode [20,21] with a statistical distribution of these modes with the time of grinding), (iii) for a given mass of the balls, the kinetic energy is a quadratic function of the ball velocity and therefore is a quadratic function of the rotation speed of the disc and of the eccentricity r d of the vial on the rotating disc (Eq. (12)).…”

The evolution of structure induced by intensive milling in the system 2Bi2O3·3TiO2

“…If this is the case, mechanosynthesis of Bi 4 Ti 3 O 12 starting from the constituent oxides may be regarded as a so-called threshold process [40], in contrast to the so-called cumulative process attributed to some other systems, for example, the displacement reaction Ni + CuO ! Cu + NiO [41].…”

Mechanical alloying and reactive milling in a high energy planetary mill

“…While simplified estimates can be used initially, it is suggested that a computational model will need to be developed for engineering predictions. Such a model can be based on discrete element modeling (DEM) [16][17][18][19] considering mechanical motion of the milling tools (balls) and the energy transfer from the milling tools to the powder. The approach outlined above was initially explored in Refs.…”