Overview
I am a Research Fellow on Additive Manufacturing at the Centre for Additive Layer Manufacturing (CALM), currently working as the lead researcher on the collaborative project between Victrex and CALM. My expertise spans across material characterisations, analytical modelling, and the development of high-performance high-temperature polymers for additive manufacturing processes.
Prior to join Exeter, I obtained my PhD in Physics from Strasbourg University, where I investigated contact mechanics and friction of oriented semi-crystalline polymers. The project was sponsored by Dutch Polymer Institute (DPI). During my PhD, I have collaborated closely with Eindhoven University of Technology (TU/e) and industrial partners including SABIC, SKF, DSM, and Teijin Aramid.
Publications
Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.
| 2024 | 2023 | 2022 | 2021 | 2020 |
2024
- Yi N, Chen Y, Shen J, Davies R, Ghita O. (2024) Correlation between interfacial bond strength and degree of healing in overprinting PAEK on CF/PAEK composites, Composites Part A: Applied Science and Manufacturing, pages 108217-108217, article no. 108217, DOI:10.1016/j.compositesa.2024.108217. [PDF]
- Yi N, Chaplin A, Grasmeder J, Ghita O. (2024) Adaptable polyaryletherketones (PAEKs) with competing crosslinking and crystallisation mechanisms, Scientific Reports, volume 14, no. 1, article no. 679, DOI:10.1038/s41598-024-51231-3. [PDF]
- Liu Y, Davies R, Yi N, McCutchion P, Chen B, Ghita O. (2024) Multiscale Porous Poly (Ether-Ether-Ketone) Structures Manufactured by Powder Bed Fusion Process, 3D Printing and Additive Manufacturing, volume 11, no. 1, pages 219-230, DOI:10.1089/3dp.2021.0317. [PDF]
2023
- Comelli CA, Yi N, Davies R, van der Pol H, Ghita O. (2023) Observation of Peek Melting Peaks within the Additive Manufacturing Material Extrusion Process in Relation to Isothermal and Non‐Isothermal Processes, Macromolecular Materials and Engineering, DOI:10.1002/mame.202300386. [PDF]
- Liu Y, Yi N, Davies R, McCutchion P, Ghita O. (2023) Powder Bed Fusion Versus Material Extrusion: A Comparative Case Study on Polyether-Ether-Ketone Cranial Implants, 3D Printing and Additive Manufacturing, volume 10, no. 5, pages 941-954, DOI:10.1089/3dp.2021.0300. [PDF]
2022
- Comelli CA, Yi N, Davies R, van der Pol H, Ghita O. (2022) Material extrusion thermal model mapped across polyetheretherketone isothermal and continuous cooling transformation charts, Additive Manufacturing, volume 59, pages 103129-103129, article no. 103129, DOI:10.1016/j.addma.2022.103129. [PDF]
- Yi N, Davies R, Chaplin A, Ghita O. (2022) Novel backbone modified polyetheretherketone (PEEK) grades for powder bed fusion with enhanced elongation at break, Additive Manufacturing, volume 55, pages 102857-102857, article no. 102857, DOI:10.1016/j.addma.2022.102857. [PDF]
2021
- Davies R, Yi N, McCutchion P, Ghita O. (2021) Mechanical property variance amongst vertical fused filament fabricated specimens via four different printing methods, Polymer International, volume 70, no. 8, pages 1073-1079, DOI:10.1002/pi.6172. [PDF]
- Yi N, Davies R, Chaplin A, McCutchion P, Ghita O. (2021) Slow and fast crystallising poly aryl ether ketones (PAEKs) in 3D printing: crystallisation kinetics, morphology, and mechanical properties, Additive Manufacturing, DOI:10.1016/j.addma.2021.101843.
2020
- Chen B, Davies R, Liu Y, Yi N, Qiang D, Zhu Y, Ghita O. (2020) Laser sintering of graphene nanoplatelets encapsulated polyamide powders, Additive Manufacturing, volume 35, pages 101363-101363, article no. 101363, DOI:10.1016/j.addma.2020.101363. [PDF]
