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NAERINGSPH-Nærings-phd

How transparency and particle size in Silicon Carbide influence the possibilities for 3D-printing with Digital Light Processing

Alternative title: 3D-printing av silisiumkarbid

Awarded: NOK 1.9 mill.

Project Number:

329496

Application Type:

Project Period:

2021 - 2025

Funding received from:

Today, the demands of materials, manufacturing and sustainability are high. A way to approach this is to reduce waste of material during production, and at the same time making the process more efficient. For plastics, metals and ceramics, 3D-printing seems to be a good opportunity to solve these challenges. In this project, one technique will be in focus, Digital Light Processing. (DLP) Generally, DLP works like this; The desired part is draw digitally with explicit measurements, and this information is then forwarded to a printer. The printer then has its one dosage system, which it utilises to form the initial part. The material itself, Silicon Carbide, will in this project be in a slurry, which means fine ceramic particles (0,001 mm) dispersed together with organic compounds since their presence will help with the following curing of the part. The part is manufactured layer by layer, its starts with a thin layer of slurry spread out on an adjustable platform. Afterwards a laser will radiate certain points based on the digital drawing. The organic compound will be instantly cured when hit by the laser beam, and due to a mesh in the printer a multiple number of points are hit at the same time, hence produce one layer. After one layer is done, the platform will be lowered, and another thin layer of slurry is added on top. When the whole printing process is done, is easy to separate the cured part from the slurry. Afterwards the part will be heat treated so that the particles will sinter together, this part should then be as hard as casted or pressed parts. 3D-printing is a technique that has been used for decades, yet there are few options specifically designed for Silicon Carbide. The main goal for this project is to find out which material properties to consider when 3D-printing Silicon Carbide. Further on, this can hopefully be the foundation for standardizing 3D-printing of Silicon Carbide.

Hovedmålet i prosjektet er å øke forståelsen av hvordan forskjellige SiC-pulver parametere påvirker DLP-prosessen og sintringsegenskapene til de 3D-printende SiC-komponentene. Mer spesifikt vil man fokusere mest på følgende SiC-parametere, da disse antas å ha størst påvirkning på DLP-prosessen og sintringsegenskapene: • Transparens (gjennomsiktighet) til SiC-partiklene • Partikkelform, partikkelstørrelse og partikkelstørrelses-fordeling (PSD) • Renheten til partiklene, både overflatekjemi og bulk-kjemi For å finne sammenhengen mellom de ulike parameterne er det valgt, å gjøre systematiske en-parameter studier, som videre kan gi statistiske representasjoner. Det vil si at for den enkelte serie som undersøkes, holdes alle parameterne konstant utenom en, slik at det kan undersøkes hvordan endringer i denne parameteren påvirker egenskapene til materialet. Dette vil da kunne indikere på hvilket nivå parameterne bør være for at materialet skal få de optimale egenskapene.

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Funding scheme:

NAERINGSPH-Nærings-phd