The role of paraffin wax on the properties and printability of ethylene vinyl acetate-based feedstocks for alumina fused filament fabrication

Vukšić, Milan (author), Bek, Marko (author), Slemenik Perše, Lidija (author), Maček, Marjeta (author), Kocjan, Andraž (author), Iveković, Aljaž (author)

Fused filament fabrication (FFF) is a versatile and inexpensive additive manufacturing (AM) technique for fabrication of complex shaped ceramic structures. The composition of the binder phase in ceramic-filled feedstock is crucial in determining its rheological behaviour during processing as well as the ability to obtain a defectfree part following debinding and sintering. In this study, the effect of paraffin wax (PW) addition to alumina feedstock with ethylene vinyl acetate (EVA) binder, on feedstock preparation, printability, and debinding has been investigated. The PW incorporation resulted in successful fabrication of a flexible filament with a bending (fracture) strain of 4±1 %. The addition of PW however did not have a significant impact on the debinding of the developed alumina filaments. The printed parts could only be successfully debinded up to 2 mm wall thickness. The subsequent sintering of the debinded parts resulted in a relative density of 98 %.

• Language: English
• Keywords: additive manufacturing, fused filament fabrication, paraffin wax, alumina
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: 9 str.
• Numbering: Vol. 16
• PID: 20.500.12556/RUL-168860
• UDC: 620.1/.2
• ISSN on article: 2666-5395
• DOI: 10.1016/j.oceram.2023.100496
• COBISS.SI-ID: 170194691
• Publication date in RUL: 29.04.2025

Record is a part of a journal

• Title: Open ceramics
• Publisher: Elsevier Ltd
• ISSN: 2666-5395
• COBISS.SI-ID: 25023747

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: aditivna proizvodnja, taljeni filamenti, parafinski vosek, aluminijev oksid

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0264
• Name: Trajnostni Polimerni materiali in Tehnologije

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0087
• Name: Keramični in komplementarni materiali za napredne inženirske in biomedicinske aplikacije