THE PHYSICS OF MECHANICAL ALLOYING IN A PLANETARY BALL MILL - MATHEMATICAL TREATMENT

Based on a kinematic modeling of the planetary ball mill, the kinemati c equations giving the velocity and the acceleration of a ball in a vi al in a planetary ball mill are given. The kinetic energy transferred at the collision event, the shock frequency, and the injected shock po wer are also calculated. The confrontation of the calculated to some e xperimental results documented in the material literature, show that n either the shock energy nor the shock frequency separately taken into account, govern the end product but only the injected shock power is r esponsible for the ball milled end product.