Thermal properties of 3-D printed polylactic acid-metal composites

Abstract

fraction on thermal conductivity. Despite this limitation, the thermal conductivity values provided can be used to engineer thermal conductivity into 3-D printed parts with these PLA-based composites. Finally, several high-value applications of such 3-D printed materials that look metallic, but have low thermal conductivity are reviewed.

Design of the SLS-machine for PEEK

“…• Leveling of the double-knife recoater is set by the operator manually before starting the operation on the upper surface of the platform; • Leveling of the double-knife recoater is always skewed relative to the platform top surface. While applying the powder layer from the left limit position (Figure 7a), the applied layer thickness is specified by knife 4; • While applying the powder layer from the right limit position (Figure 7b), the thickness of the applied layer is specified by knife 5, and therefore the difference of the thickness of the layers applied from the left limit position and the right limit position will be δ μm; • In case of proper adjustment of the heaters installed above the applied powder layer, they transfer an equal heat amount to each applied powder layer; • Pyrometer mounted above the applied powder layer measures the heating of the applied powder layer and registers slight differences between the values of heating the powder layers applied from the left limit position and those applied from the right limit position due to the difference of thickness layers of the δ ~20 μm; • The sum of the heating values (integral heating) for the 25 layers of powder applied from the leftmost position will differ from the sum of the heat values for the 25 layers of powder deposited from the extreme right position due to the difference in layer thickness by the δ value; • Based on the difference in the integral heating for the powder layers applied from the extreme left and rightmost positions, the skewing degree of the leveling double knife relative to the upper surface of the platform can be unambiguously concluded; • The alignment control of the double knife according to the principles described above must be carried out before the 3D part building for the correctness verification of the operator adjustment, and also directly during the construction process. The above-described principles allow controlling the powder delivery alignment device in the developed SLS machine in the automatic regime.…”

“…The SLS makes it possible to manufacture products with a unique internal and/or external surface shape and perspective physical and mechanical properties [1][2][3][4][5]. At the same time, there are a number of promising polymer powder materials that differ from those traditionally and long used in the technology of SLS-nylon [6,7], polycarbonate [8][9][10][11][12], polyamides [13][14][15][16][17], polyethylenes [18,19], or ferrielectric polyvinylidene fluorides [20] and so onby a combination of high heat resistance, durability, and a wide range of interesting physic-mechanical and chemical-biological properties [21][22][23][24][25][26].…”

The Setup Design for Selective Laser Sintering of High-Temperature Polymer Materials with the Alignment Control System of Layer Deposition

“…The SLS makes it possible to manufacture products with a unique internal and/or external surface shape and perspective physical and mechanical properties [1][2][3][4][5]. At the same time, there are a number of promising polymer powder materials that differ from those traditionally and long used in the technology of SLS-nylon [6,7], polycarbonate [8][9][10][11][12], polyamides [13][14][15][16][17], polyethylenes [18,19], or ferrielectric polyvinylidene fluorides [20] and so on-by a combination of high heat resistance, durability, and a wide range of interesting physic-mechanical and chemical-biological properties [21][22][23][24][25][26].…”

Investigation into the Influence of Fused Deposition Modeling (FDM) Process Parameters on the Thermal Properties of 3D-Printed Parts

“…Furthermore, they examined the dynamic mechanical properties of the composite and demonstrated that high filler percentage reduced the material strength due to poor filler distribution, agglomeration, and the development of voids. Laureto et al [13] used the guarded heat flow meter TCA300 to quantify the through-plane thermal conductivity of 3Dprinted parts made from the commercially available Polylactic acid (PLA) filament and its metal composites. Similar attempts were carried out, but with different metallic composites such as in the studies by Hwang et al [14] and Masood et al [15].…”