Thesis
A hybrid additive manufacturing framework for the multi-phase fabrication and in-line characterization of functional devices
- Abstract:
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Multi-material, multi-technology (MMMT) manufacturing systems combine or hybridize the benefits of individual fabrication and characterization techniques into a single manufacturing platform. In particular MMMT systems based on additive manufacturing (AM) technologies offer new opportunities for increased design freedom and additional functionality. However, the realization of the potential of AM-based MMMT systems is held back by the lack of accessible, affordable and reconfigurable hybrid-AM systems.
In this thesis, a novel, extendable hybrid-AM framework/concept is introduced. A corresponding, modular machine has been designed and built from the bottom-up. Detailed insights into the design considerations, operating principles, associated digital workflows and potential applications are discussed. The machine provided design freedom and in-line functionality previously unachievable. These aspects are then demonstrated through the: (1) AM of functional, form-factor free energy storage devices (supercapacitors, EDLC’s) in a single, automated multi-material operation; and (2) measurement of a material property distribution (the local dielectric permittivity (εr) in 3D) within printed parts as they are being formed. Careful consideration was given to the underlying materials- and AM processing-science. The supercapacitor behaviour was assessed through a range of electro-chemical and other characterization techniques, and provided encouraging energy storage behaviour. A ring-shaped supercapacitor was fabricated in a single manufacturing operation, unachievable by conventional manufacturing. Non-destructive, in-line permittivity data was reconstructed into three dimensional (3D) dielectric “images” of a printed object, and techniques to understand and improve the spatial resolution are presented.
The research aimed to accelerate the integration of functional devices in product manufacture (in particular for applications with irregular volume/shape and mass-customization requirements), accelerate the design-make-test cycle for functional devices through insight in device conformance to intended design (in-line quality control), and provide a versatile hybrid-AM environment for further research.
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- Files:
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(Preview, Dissemination version, pdf, 216.0MB, Terms of use)
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Authors
Contributors
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Materials
- Sub department:
- Materials
- Role:
- Supervisor
- Institution:
- The University of Sheffield
- Role:
- Examiner
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Engineering Science
- Sub department:
- Engineering Science
- Role:
- Examiner
- Funder identifier:
- http://dx.doi.org/10.13039/501100000266
- Grant:
- EP/P005578/1
- EP/006566/1
- EP/ M009521/1
- EP/N509711/1
- EP/S001239/1
- EP/P005411/1
- DOI:
- Type of award:
- DPhil
- Level of award:
- Doctoral
- Awarding institution:
- University of Oxford
- Language:
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English
- Keywords:
- Subjects:
- Deposit date:
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2020-07-20
- ARK identifier:
Terms of use
- Copyright holder:
- Fieber, L
- Copyright date:
- 2020
- Rights statement:
- The copyright of this thesis rests with the author. Unless otherwise indicated, its contents are licensed under a Creative Commons attribution – non commercial international license (CC BY-NC 4.0). Under this license you may share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material) provided you give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the author endorses you or your use. You may not use the material for commercial purposes.
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