Journal
MOLECULES
Volume 20, Issue 10, Pages 19041-19050Publisher
MDPI
DOI: 10.3390/molecules201019041
Keywords
selective laser sintering; thermal influence; numerical simulation; polymer nanocomposites
Funding
- Agency for Science, Technology and Research (A*STAR) Singapore
- University of Nottingham UK
- EPSRC [EP/I033335/1, EP/I033335/2] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I033335/2, EP/I033335/1] Funding Source: researchfish
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The thermal influence of carbon nanotubes (CNTs) on the PA12 in the laser sintering process was assessed by physical experiments and a three dimensional simulation model. It appears that, by adding the CNTs into the PA12 matrix, the thermal conductivity increased. A double ellipsoidal heat flux model was applied to input a three dimensional, continuous moving, volumetric laser heat source. The predicted three dimensional temperature distributions suggested that the laser heat was conducted wider and deeper in the PA12-CNT sample than PA12. Greater heat conduction can reduce the interspace between two successive layers, and result in the increase of the parts' density and properties.
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