Laser Powder Bed Fusion of the Ni-Mn-Sn Heusler Alloy for Magnetic Refrigeration Applications
Laser Powder Bed Fusion of the Ni-Mn-Sn Heusler Alloy for Magnetic Refrigeration Applications
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DOI：
10.1016/j.addma.2023.103536
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发表时间：
2023-04
影响因子：
11
通讯作者：
Kun Sun;A. Mohamed;Sheng Li;Minki Jeong;J. Head;Moataz M. Attallah
中科院分区：
文献类型：
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作者：
Kun Sun;A. Mohamed;Sheng Li;Minki Jeong;J. Head;Moataz M. Attallah
本研究旨在开发一种低成本的致密磁热Ni-Mn-Sn Heusler合金（HA）的制造路线，使用激光粉末床熔融（LPBF）增材制造技术，通过从其元素成分原位合金化。LPBF能够生产高表面积比的3D打印组件，以提高磁制冷机的传热效率。对块体、网格和微通道圆柱体进行了激光参数研究，结果表明，激光能量密度（EV）为18.52J/mm 3、53.33J/mm 3和89.89J/mm 3时，样品的致密度最高，分别达到6.8g/cm 3、8.2g/cm 3和8.3g/cm 3。经热处理后，三种试样均为L2 1相，并含有少量的4 O正交相和马氏体-奥氏体相变（T M）及居里温度（T C A）。三个样品在T_M附近的最大磁熵变（Δ S_（max））值分别为0.53Jkg ~（-1）K ~（-1）（160 K）、0.5Jkg ~（-1）K ~（-1）（130 K）和0.3Jkg ~（-1）K ~（-1）（170 K）。在T C A（~ 320 K）时，磁场变化为1 T时，Δ Smax约为1.0 Jkg ~（-1）K ~（-1）。
This study aims to develop a manufacturing route for a low-cost dense magnetocaloric Ni-Mn-Sn Heusler alloy (HA) using laser powder bed fusion (LPBF) additive manufacturing technique by in-situ alloying from its elemental constituents. LPBF enables the production of high surface-area-to-volume 3D-printed components to increase heat transfer efficiency in magnetic refrigerators. A laser parametric study was performed on blocks, lattices and microchanneled cylinders for maximum densification, the highest density was observed at the samples with laser energy density (E V) of 18.52 J/mm 3, 53.33 J/mm 3 and 89.89 J/mm 3, where they achieved a density of 6.8 g/cm 3, 8.2 g/cm 3 and 8.3 g/cm 3, respectively. After heat treatment, the three samples show the L2 1 phase with a minor 4 O orthorhombic phase and double magnetic transitions, martensitie-austenite transition (T M) and curie temperature (T C A). The maximum magnetic entropy change (Δ S max) values of the three samples around T M are 0.53 Jkg-1 K-1 at 1 60 K, 0.5 Jkg-1 K-1 at 130 K, and 0.3 Jkg-1 K-1 at 170 K, respectively. And Δ S max of almost 1.0 Jkg-1 K-1 at T C A (∼ 320 K) for these samples with a field change of 1 T.