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  • Johansson, Emil, et al. (författare)
  • Influence of Resin Composition on the Defect Formation in Alumina Manufactured by Stereolithography
  • 2017
  • Ingår i: Materials. - : MDPI AG. - 1996-1944. ; 10:2
  • Tidskriftsartikel (refereegranskat)abstract
    • Stereolithography (SL) is a technique allowing additive manufacturing of complex ceramic parts by selective photopolymerization of a photocurable suspension containing photocurable monomer, photoinitiator, and a ceramic powder. The manufactured three-dimensional object is cleaned and converted into a dense ceramic part by thermal debinding of the polymer network and subsequent sintering. The debinding is the most critical and time-consuming step, and often the source of cracks. In this study, photocurable alumina suspensions have been developed, and the influence of resin composition on defect formation has been investigated. The suspensions were characterized in terms of rheology and curing behaviour, and cross-sections of sintered specimens manufactured by SL were evaluated by SEM. It was found that the addition of a non-reactive component to the photocurable resin reduced polymerization shrinkage and altered the thermal decomposition of the polymer matrix, which led to a reduction in both delamination and intra-laminar cracks. Using a non-reactive component that decomposed rather than evaporated led to less residual porosity.
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Johansson, Jan (1)
Adolfsson, Erik (1)
Lyckfeldt, Ola (1)
Johansson, Emil (1)
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Geng, Qiuqing (1)
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