Effect of nano⁃SiO2 content on surface quality and mechanical properties of PES⁃based laser sintered parts

doi:10.19491/j.issn.1001-9278.2023.11.002

Abstract

Abstract:

Polyethersulfone resin （PES）/nano⁃SiO₂ composite sintered parts were prepared through selective laser sintering using PES as a matrix and nano⁃SiO₂ as a filler. The effect of nano⁃SiO₂ content on the surface quality and mechanical properties of the composite sintered parts were investigated. The results indicated that the composite sintered parts presented a little change in the arithmetic mean in the nano⁃SiO₂ content range of 0.1~1.0 wt% and then their deviation increased significantly at a nano⁃SiO₂ content above 1.0 wt%. The tensile strength and flexural strength of the composite sintered parts increased first and then tended to decrease with an increase in the nano⁃SiO₂ content. The tensile strength and bending strength of the composite sintered parts reached a maximum at a nano⁃SiO₂ content of 0.5 wt%. Compared to pure PES sintered parts， the composite sintered parts exhibited an increase in tensile strength and bending strength by 22.66 % and 41.51 %， respectively. Their impact strength reached a maximum at a nano⁃SiO₂ content of 0.7 wt%， which was increased by 12.10 %.

Key words: selective laser sintering, nano silica, polyethersulfone resin, surface quality, mechanical property

CLC Number:

TQ326.5

CHEN Hui, QIAN Weidong, SUN Lingsheng, TAN Bo. Effect of nano⁃SiO₂ content on surface quality and mechanical properties of PES⁃based laser sintered parts[J]. China Plastics, 2023, 37(11): 10-14.

Figures/Tables 8

Fig.1. Surface morphology of sintered parts with different nano⁃SiO2 contents

Fig.2. Effect of nano⁃SiO2 content on Ra of the sintered parts

Fig.3. Agglomeration of nano⁃SiO2 in the composite powders

Fig.4. Microstructure photos of tensile fracture of sintered parts with different nano⁃SiO2 contents

Fig.5. Effect of nano⁃SiO2 content on tensile strength and bending strength of the sintered parts

Fig.6. Interfacial bonding between nano⁃SiO2 and PES

Fig.7. Effect of nano⁃SiO2 content on impact strength of the sintered parts

Fig.8. Effect of nano⁃SiO2 content on stacking density and density

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Effect of nano⁃SiO₂ content on surface quality and mechanical properties of PES⁃based laser sintered parts

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