Improved mechanical properties of 3D-printed SiC/PLA composite parts by microwave heating
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Improved mechanical properties of 3D-printed SiC/PLA composite parts by microwave heating Yanqing Wang1,a), Zengguang Liu1, Huwei Gu1, Chunzhi Cui2, Jingbin Hao3 1
School of Materials Science & Engineering, China University of Mining and Technology, Xuzhou 221116, China Department of Training, Xuzhou, Engineer Command College, Jiangsu 221004, China 3 School of Mechatronic Engineering, China of Mining and Technology, Xuzhou 221116, China a) Address all correspondence to this author. e-mail: [email protected] 2
Received: 7 July 2019; accepted: 16 September 2019
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 3Dprinted 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.
Introduction 3D printing, also called the additive manufacturing (AM) or the rapid prototyping (RP), emerged in the 1980s as one of the most representative techniques of the Third Industrial Revolution; it is also considered as a technique to drive rapid world development in many industrial applications [1, 2, 3]. In biomedicine, 3D printing can be used to make bone substitutes and frameworks with good biocompatibility (BC) [4, 5, 6]. In new energy resources, electrode structure of lithium ion battery and some functional components and parts can be made by using 3D printing [7, 8, 9]. In mold processing, optimization of mold design and shortening of research and development cycle are possible by 3D printing [10]. 3D printing includes the following processes: selective laser sintering (SLS), fused deposition modeling (FDM), stereolithography appearance (SLA), laminated object manufacturing (LOM), and three-dimensional printing (3DP) [11]. FDM process is advantageous for 3D printing because no laser is needed, and low melting point polymer filaments such as polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS), expensive in cost and maintenance,
ª Materials Research Society 2019
small in size, and flexible as a desktop tool, enables AM of multiphase composite materials available by multi-jet and multi-channel feeding so as to obtain the multifunctional components [12]. It is
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