Abstract
Laser additive manufacturing allows the production of polymeric or metallic parts with complex shapes. A major advantage of this contactless technology is that it allows reaching very high energy densities with an excellent precision in short times. This is very suitable for processing hard refractory metals for instance. Unfortunately, current results are less satisfactory for ceramics as a consequence of their intrinsic properties such as a low thermal shock resistance and very high refractoriness. Another significant limitation is related to the poor absorptivity of oxide ceramics in the near-infrared region which is typical for most commercial selective laser melting (SLM) machines. This study considers an alternative to overcome the above-mentioned limitations, especially the lack of absorptivity. SLM of oxide ceramics has become possible. Large parts with complex shapes and relative densities up to 90% have been manufactured on a commercial SLM machine.
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ACKNOWLEDGMENT
The European Regional Development Fund (ERDF) and Wallonia, are gratefully acknowledged for their financial support of this research project (Revêtements Fonctionnels — LASESURF — ECV12020010884F-830033) in the frame of the “Convergence programme”.
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Juste, E., Petit, F., Lardot, V. et al. Shaping of ceramic parts by selective laser melting of powder bed. Journal of Materials Research 29, 2086–2094 (2014). https://doi.org/10.1557/jmr.2014.127
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DOI: https://doi.org/10.1557/jmr.2014.127