Grinding of Fe-B4C Powder Charge in an Inertial Cone Mill

V.M. Dyadyun

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2008, #03/04


The use of an inertial cone mill to grind iron and boron carbide powder mixtures is examined. The dependence of the particle-size distribution in the mixture after grinding on the maximum particle size is analyzed. It is established that the content of coarse-grained fractions (larger than 100 microns) substantially decreases as compared with the initial powder even after three grinding cycles. If the number of grinding cycles is increased to 20, the content of finer fractions (smaller than 63 microns) is only 6 to 8% higher than in powders subjected to 3-12 grinding cycles in the inertial cone mill. Therefore, more than 3 or 6 cycles to produce Fe-B4C powder with the optimal content of the <100>63 micron fraction are unreasonable.