Journal
8TH INTERNATIONAL CONFERENCE ON LASER ASSISTED NET SHAPE ENGINEERING (LANE 2014)
Volume 56, Issue -, Pages 117-124Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.phpro.2014.08.154
Keywords
Alumina; Ceramics; Additive manufacturing; Selective laser sintering; Selective laser melting; Electrophoretic deposition; Preheating
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Funding
- KU Leuven [GOA/2010/12]
- Research Foundation - Flanders (FWO) [FWO-G.0956.14N]
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Direct selective laser sintering (SLS) or selective laser melting (SLM) are additive manufacturing techniques that can be used to produce three-dimensional ceramic parts directly, without the need for a sacrificial binder. In this paper, a low laser energy density is applied to SLS/SLM high density powder layers of sub-micrometer alumina at elevated temperatures (up to 800 degrees C). In order to achieve this, a furnace was designed and built into a commercial SLS machine. This furnace was able to produce a homogeneously heated cylindrical zone with a height of 60 mm and a diameter of 32 mm. After optimizing the layer deposition and laser scanning parameters, two ceramic parts with a density up to 85% and grain sizes as low as 5 mu m were successfully produced. (C) 2014 Published by Elsevier B.V.
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