The investigation of the vibration compaction of two-component systems of spherical powders
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The process of vibration compaction of a two-component system by the method of vibration screening was investigated; it was shown that a density of up to 83% of the theoretical value is obtainable.
The maximum density of the two-component system depends, during the vibration compaction, on the percentage of each component and on the ratio of particle sizes. A higher density is achieved with a higher ratio of the diameter of the large particles to the diameter of small particles. In this case the system must contain more small particles.
There are optimum conditions for the vibration compaction of a two-component system which ensure the highest rate of screening or the greatest density. For spherical copper powders the maximum screening rate was obtained at a frequency of 50 Hz and an amplitude of 10–20μ, and the maximum density at a frequency of 50 Hz and an amplitude of 5μ.
Amplitudes exceeding the optimum values (with regard to density) cause at the corresponding frequency a distortion of the upper layer of the large particles and disrupt the entire process of uniform screening of the smaller particles, which leads to a reduced density of the entire system.
KeywordsParticle Size Compaction Small Particle Large Particle High Ratio
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