Abstract
Both the particle characteristics and the pressurization methods have an important influence on powder compression behavior. Compression of powder with different average particle sizes, sphericity and adhesion were experimentally investigated by the FT4 rheometer and the pressurized visualization tank. The difference in compressibility caused by particle characteristics and pressurization methods were analyzed. The results show that the smaller the average particle size, the higher the sphericity and the greater the adhesion, the greater the compressibility of the powder. In the experimental range, the effect of gas pressurization is less than mechanical pressurization on powder compression. The relationship between normal stress and gas pressurization rate was proposed and the mechanism of different pressurization methods was also discussed with compression position and mode.
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