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Materials 2017, 10(8), 864; doi:10.3390/ma10080864

Selective Laser Sintering of Nano Al2O3 Infused Polyamide

Mechanical Engineering Department, Auckland University of Technology, Auckland 1010, New Zealand
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Received: 23 June 2017 / Revised: 5 July 2017 / Accepted: 19 July 2017 / Published: 27 July 2017
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Abstract

Nano Al2O3 polyamide composites are evaluated for processing by selective laser sintering. A thermal characterization of the polymer composite powders allowed us to establish the possible initial settings. Initial experiments are conducted to identify the most suitable combinations of process parameters. Based on the results of the initial trials, more promising ranges of different process parameters could be identified. The post sintering characterization showed evidence of sufficient inter-particle sintering and intra-layer coalescence. While the inter-particle coalescence gradually improved, the porosity levels slightly decreased with increasing laser power. The nano-filler particles tend to agglomerate around the beads along the solid tracks, possibly due to Van der Walls forces. The tensile stress results showed an almost linear increase with increasing nano-filler content. View Full-Text
Keywords: selective; laser; sintering; polyamide; nano-ceramics; coalescence selective; laser; sintering; polyamide; nano-ceramics; coalescence
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Warnakula, A.; Singamneni, S. Selective Laser Sintering of Nano Al2O3 Infused Polyamide. Materials 2017, 10, 864.

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