Crystallization kinetics of polyetheretherketone during high temperature-selective laser sintering

Chen, Peng; Cai, Haosong; Li, Zhaoqing; Li, Maoyuan; Wu, Hongzhi; Su, Jin; Wen, Shifeng; Zhou, Yan; Liu, Jie; Wang, Congjun; Yan, Chunze; Shi, Yusheng

doi:10.1016/j.addma.2020.101615

Cited by 29 publications

(36 citation statements)

References 29 publications

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“…Thanks to the increasing interest in the development of new thermoplastic materials for selective laser sintering, similar studies were found in the literature for materials such as polypropylene [ 125 , 128 , 129 ] and polyetherketone [ 114 , 130 ].…”

Section: Selective Laser Sintering Processsupporting

confidence: 53%

Process Phenomena and Material Properties in Selective Laser Sintering of Polymers: A Review

et al. 2021

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Selective laser sintering (SLS) is a powder bed fusion technology that uses a laser source to melt selected regions of a polymer powder bed based on 3D model data. Components with complex geometry are then obtained using a layer-by-layer strategy. This additive manufacturing technology is a very complex process in which various multiphysical phenomena and different mechanisms occur and greatly influence both the quality and performance of printed parts. This review describes the physical phenomena involved in the SLS process such as powder spreading, the interaction between laser beam and powder bed, polymer melting, coalescence of fused powder and its densification, and polymer crystallization. Moreover, the main characterization approaches that can be useful to investigate the starting material properties are reported and discussed.

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Section: Selective Laser Sintering Processsupporting

confidence: 53%

Process Phenomena and Material Properties in Selective Laser Sintering of Polymers: A Review

et al. 2021

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“…However, adopting this solution requires the use of a more complex machine setup (Jiang et al , 2021). Infrared radiation from above was successfully employed by Chen et al (2020) to reduce heat dissipation during selective laser sintering (SLS) of a high-performance polymer. However, this approach cannot be easily extended to pure copper because the energy absorption provided by infrared radiation on copper is very limited (Gruber et al , 2021).…”

Section: Introductionmentioning

confidence: 99%

Densification behaviour of pure copper processed through cold pressing and binder jetting under different atmospheres

Romano

Migliori

Mariani

et al. 2022

RPJ

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Purpose Binder jetting is a promising route to produce complex copper components for electronic/thermal applications. This paper aims to lay a framework for determining the effects of sintering parameters on the final microstructure of copper parts fabricated through binder jetting. Design/methodology/approach The knowledge gained from well-established powder metallurgy processes was leveraged to study the densification behaviour of a fine high-purity copper powder (D50 of 3.4 µm) processed via binder jetting, by performing dilatometry and microstructural characterization. The effects of sintering parameters on densification of samples obtained with a commercial water-based binder were also explored. Findings Sintering started at lower temperature in cold-pressed (∼680 °C) than in binder jetted parts (∼900 °C), because the strain energy introduced by powder compression reduces the sintering activation energy. Vacuum sintering promoted pore closure, resulting in greater and more uniform densification than sintering in argon, as argon pressure stabilizes the residual porosity. About 6.9% residual porosity was obtained with air sintering in the presence of graphite, promoting solid-state diffusion by copper oxide reduction. Originality/value This paper reports the first systematic characterization of the thermal events occurring during solid-state sintering of high-purity copper under different atmospheres. The results can be used to optimize the sintering parameters for the manufacturing of complex copper components through binder jetting.

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“…Due to the improvement of mechanical and functional properties, polymeric materials are also used in additive manufacturing. In the process of manufacturing models using 3D printing methods, polymeric materials can take the form of solid [ 25 , 26 ], liquid [ 27 , 28 ], or semi-liquid [ 29 , 30 , 31 ]. The manufactured polymeric models are mainly used in the automotive [ 32 ], aviation [ 33 , 34 ], and medical industries [ 35 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Estimating the Accuracy of Mandible Anatomical Models Manufactured Using Material Extrusion Methods

Turek

Budzik

2021

Polymers

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The development of new solutions in craniofacial surgery brings the need to increase the accuracy of 3D printing models. The accuracy of the manufactured models is most often verified using optical coordinate measuring systems. However, so far, no decision has been taken regarding which type of system would allow for a reliable estimation of the geometrical accuracy of the anatomical models. Three types of optical measurement systems (Atos III Triple Scan, articulated arm (MCA-II) with a laser head (MMD × 100), and Benchtop CT160Xi) were used to verify the accuracy of 12 polymer anatomical models of the left side of the mandible. The models were manufactured using fused deposition modeling (FDM), melted and extruded modeling (MEM), and fused filament fabrication (FFF) techniques. The obtained results indicate that the Atos III Triple Scan allows for the most accurate estimation of errors in model manufacturing. Using the FDM technique obtained the best accuracy in models manufactured (0.008 ± 0.118 mm for ABS0-M30 and 0.016 ± 0.178 mm for PC-10 material). A very similar value of the standard deviation of PLA and PET material was observed (about 0.180 mm). The worst results were observed in the MEM technique (0.012 mm ± 0.308 mm). The knowledge regarding the precisely evaluated errors in manufactured models within the mandibular area will help in the controlled preparation of templates regarding the expected accuracy of surgical operations.

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Crystallization kinetics of polyetheretherketone during high temperature-selective laser sintering

Cited by 29 publications

References 29 publications

Process Phenomena and Material Properties in Selective Laser Sintering of Polymers: A Review

Process Phenomena and Material Properties in Selective Laser Sintering of Polymers: A Review

Densification behaviour of pure copper processed through cold pressing and binder jetting under different atmospheres

Estimating the Accuracy of Mandible Anatomical Models Manufactured Using Material Extrusion Methods

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