TY - JOUR
T1 - Measurement of effective thermal conductivity of composite powders of 2D materials and metals for additive manufacturing
AU - Lee, Hyunjong
AU - Koutsioukis, Apostolos
AU - Jafari, Davoud
AU - Geurts, Bernard J.
AU - Wits, Wessel W.
N1 - Conference code: 9
PY - 2024
Y1 - 2024
N2 - Laser Powder Bed Fusion (LPBF), a promising additive manufacturing technique for composites of 2D materials and metals, requires knowledge of thermophysical properties, such as the thermal conductivity of powder, for process optimization. In this study, we measured the effective thermal conductivity of the most representative Cu-graphene composite powder in the field of heat transfer applications. To measure thermal conductivity, we propose a differential scanning calorimetry (DSC) method to measure the thermal resistances of a powder bed under steady-state heat flow conditions. We observe that the thermal conductivity of a composite powder is 1,000 times lower than that of the bulk metal without 2D material addition; e.g., exhibiting ∼ 0.30 W/mK in Cu-1wt.% graphene powder. Furthermore, we discuss powder size and morphology impact on thermal conductivity influencing the number of contact points and thermal contact resistance. Our findings contribute to understanding the thermal conductivity of composite powders in a powder bed and aid in optimizing LPBF processes.
AB - Laser Powder Bed Fusion (LPBF), a promising additive manufacturing technique for composites of 2D materials and metals, requires knowledge of thermophysical properties, such as the thermal conductivity of powder, for process optimization. In this study, we measured the effective thermal conductivity of the most representative Cu-graphene composite powder in the field of heat transfer applications. To measure thermal conductivity, we propose a differential scanning calorimetry (DSC) method to measure the thermal resistances of a powder bed under steady-state heat flow conditions. We observe that the thermal conductivity of a composite powder is 1,000 times lower than that of the bulk metal without 2D material addition; e.g., exhibiting ∼ 0.30 W/mK in Cu-1wt.% graphene powder. Furthermore, we discuss powder size and morphology impact on thermal conductivity influencing the number of contact points and thermal contact resistance. Our findings contribute to understanding the thermal conductivity of composite powders in a powder bed and aid in optimizing LPBF processes.
U2 - 10.1088/1742-6596/2766/1/012186
DO - 10.1088/1742-6596/2766/1/012186
M3 - Conference article
AN - SCOPUS:85195599454
SN - 1742-6588
VL - 2766
JO - Journal of physics: Conference series
JF - Journal of physics: Conference series
M1 - 012186
T2 - 9th European Thermal Sciences Conference, EUROTHERM 2024
Y2 - 10 June 2024 through 13 June 2024
ER -