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Improved mechanical properties of 3D-printed SiC/PLA composite parts by microwave heating

Published online by Cambridge University Press:  09 October 2019

Yanqing Wang ,
Zengguang Liu ,
Huwei Gu ,
Chunzhi Cui  and
Jingbin Hao
Yanqing Wang*
Affiliation:
School of Materials Science & Engineering, China University of Mining and Technology, Xuzhou 221116, China
Zengguang Liu
Affiliation:
School of Materials Science & Engineering, China University of Mining and Technology, Xuzhou 221116, China
Huwei Gu
Affiliation:
School of Materials Science & Engineering, China University of Mining and Technology, Xuzhou 221116, China
Chunzhi Cui
Affiliation:
Department of Training, Xuzhou, Engineer Command College, Jiangsu 221004, China
Jingbin Hao
Affiliation:
School of Mechatronic Engineering, China of Mining and Technology, Xuzhou 221116, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Polylactic acid (PLA) filament 3D parts printed by fused deposition modeling (FDM) have poor mechanical properties because of weak fusion interfaces. This article shows that SiC-coated PLA filaments are effective means to increase mechanical performance of PLA composites that are microwave heated. Numerical calculations on temperature-rising characteristics and temperature distribution of the interface in the microwave field are shown. 3D-printed specimens of PLA/SiC composites were printed by FDM and heated in a microwave. The experiments show the SiC/PLA composite filaments have better temperature-rising characteristics and temperature distribution at 185 °C for 60 s in the microwave field, and this enabled the 3D-printed specimens to achieve in situ remelting on the interface and increased interface bonding between PLA filaments. The SiC/PLA composite specimens heated using microwave increased by 51% in tensile strength, 42% in tensile modulus, and 18.7% in interlayer breaking stress relative to PLA. These results provided a new approach for the improvement of FDM workpiece strength.

Keywords

FDMnumerical calculationSiC/PLA composite filamentsmicrowaveinterface bonding
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 20 , 28 October 2019 , pp. 3412 - 3419
Copyright
Copyright © Materials Research Society 2019 

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