積層製造中的粉末高分子材料使用製程有多噴射熔融(Multi Jet Fusion,MJF) ,選擇性雷射燒結(Selective Laser Sintering,SLS) ,黏著劑噴印技術(Binder Jetting,BJ)等，這種以粉末的列印製程，藉由施加光、電、熱等能量將粉床機構之粉末結合，可使用多種粉末材料成形。
本研究討論如何利用碳黑披覆製程製備複合粉末材料改變列印性質。
以半導體單雷射製程進行列印，在相同波長808nm 雷射比較不同粉末的光反射率、雷射能量密度與預熱溫度，在不同參數下列印的試片進行分析，比較其結果的差異。
此研究應用於選擇性雷射燒結進行高分子材料之積層製造，分析碳黑披覆複合粉末對於波長808nm 雷射的結果，且使碳黑(碳粉)可均勻的披覆於粉末材料表面。針對碳黑比例、預熱溫度、雷射能量密度與碳黑披覆材料進行實驗，發現碳黑比例0.2wt%、預熱溫度173℃、能量密度0.0157 j/mm2、列印層厚 125 μm 與碳黑披覆製程下得到最佳列印性質，並比未進行碳黑披覆粉末材料反射率下降10.5%、機械性質增加28.8%。

Additive manufacturing has its versatility not only for designing the intricate and complex geometries but also push the researchers to strive for materials that have improved mechanical properties as well as better printability. Different investigations and studies have been conducted to develop composite materials which can be fruitful for the application base printed parts by requiring less amount of energy to fuse layer by layer.
Polymer-based materials in the form of powder are quite popular and used in many
powders bed processes such as in MultiJet Fusion (MJF), Selective Laser Sintering (SLS), Binder Jetting (BJ), etc. These materials use light (UV or IR), thermal or other forms of energy to fuse these particles together during layer-by-layer deposition and resulted in the functional parts of required mechanical properties. So, it’s always a challenge for the researchers to use such materials which can absorb more energy and fused together quickly. The objective of this presented work is to discuss and analyze the thermal coating process that can be used to prepare composite powder to change/improve its mechanical properties. A single semiconductor laser process was used for printing different specimens with different parameters which showed good printability with each variation. The light reflectivity, laser energy density, and preheating temperature of different powders were compared with the same wavelength of 808nm laser. Carbon black can be uniformly coated on the surface of powder materials to improve the absorption of applied energy which enhances the layer fusion among the consecutive layers.
Experiments were carried out by using the different proportions of carbon black with
different preheating temperatures, laser energy densities, and thermal coating materials. By analyzing the different variations and combinations of parameters, it was found that the proportion of 0.2 wt. % of carbon black, the preheating temperature of 173℃, the energy density of 0.016 j/mm2, and the thickness of the printing layer of 125 μm gave the optimized parameters for the coating process. These also increased the reflectivity of the powder by 10.5% and improved the mechanical properties by 28.8%

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