本研究利用銅粉末摻合聚乳酸(Polylactide，簡稱PLA)形成複合材料Copper Filamet™，利用3D列印機印製零件，再透過高溫燒結成金屬零件，以低成本的3D列印方法製造金屬零件，與利用純金屬粉末作為材料之3D列印方式不同。所使用之複合材料質量比例是90％的銅粉末和10％的聚乳酸組成(亦即體積比例為57％的銅和43％的聚乳酸)。研究中先進行3D的數值模擬，以了解此系統之熱傳特性。利用有限差分法求解能量守恆方程式來模擬加熱過程，並定義一個完成度來表示試片的熱裂解與燃燒反應的完成百分比。實驗過程分成兩大項，分別為表面形貌觀測與機械性質測量。觀察燒結前後之特性變化，並利用兩種燒結溫度曲線所得試片表面形貌與機械性質差異。機械性質量測，包括熱傳導係數、硬度、拉伸、磨耗、腐蝕等。可以得知，燒結為必要之過程，透過燒結去除聚乳酸，試片體積隨著原本試片大小等比例縮小，越大的試片收縮效果越顯著，所以零件製造精度受影響，但因體積縮小，使燒結試片的密度、強度和熱傳導係數可以提高至一定程度。整體而言，本製造方法可大幅度降低金屬零件的列印成本，但只能應用於不需要高精度的零件製造。

In this research, copper powder is blended with polylactide (PLA) to form the composite material-Copper Filamet™. The parts are printed by using a 3D printer, and then sintered into metal parts in a high-temperature sintering furnace. The metal parts are manufactured by low-cost 3D printing methods. In the research, a 3D numerical simulation is performed to understand the heat transfer properties of the system. The experiment process is divided into two major parts, surface topography observation, and mechanical property measurement.

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