Vn. Matviichuk et Vv. Panichkina, APPLICATION OF HIGH-ENERGY GRINDING FOR THE ACTIVATION OF SINTERING OF SILICON-NITRIDE POWDER, Soviet powder metallurgy and metal ceramics, 31(11), 1992, pp. 987-990
Grinding of silicon nitride powder of the PS grade with additions of y
ttrium and aluminum oxides in a high-energy centrifugal-planetary mill
is studied, where the grinding is accelerated by using balls to 20g a
nd 40g acceleration. It is shown that the powder dispersion increases
from 0.6 to 10-15 m2/g due to the grinding. The ground powders are ver
y active during sintering. The relative density of the material is 97%
at 1700-degrees-C and a nitrogen pressure of 1 MPa.