Experimental study on the effects of particle characteristics and pressurization methods on powder compression

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. (c) 2022 Elsevier Ltd. All rights reserved.

Automated summary

Both particle characteristics and pressurization methods have a significant impact on powder compression behavior. The compressibility of powder with different average particle sizes, sphericity, and adhesion was experimentally investigated. The results show that smaller particle size, higher sphericity, and greater adhesion lead to higher compressibility of the powder. Gas pressurization has a smaller effect on powder compression compared to mechanical pressurization. The relationship between normal stress and gas pressurization rate was proposed, and the mechanism of different pressurization methods was discussed.