Improving the soft magnetic properties of binder jet printed iron-silicon alloy through boron addition
Improving the soft magnetic properties of binder jet printed iron-silicon alloy through boron addition
复制标题
添加硼提高粘合剂喷射印刷铁硅合金的软磁性能
DOI：
10.1016/j.matchemphys.2022.127181
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发表时间：
2023
影响因子：
4.6
通讯作者：
Boehlert, Carl J.
中科院分区：
文献类型：
--
作者：
Kumari, Geeta;Pham, Thang Q.;Suen, Hawke;Rahman, Tanzilur;Kwon, Patrick;Foster, Shanelle N.;Boehlert, Carl J.
Fe-Si合金是一类重要的软磁材料，具有高磁导率和低磁滞损耗。将Si含量增加到3wt%以上促进更粗的晶粒尺寸和更大的电阻率，从而增强磁性能，例如磁导率和比损耗密度。然而，增加的硅含量使得加工具有挑战性。增材制造技术能够生产具有高硅含量的近净形Fe-Si合金，实际上消除了加工挑战。研究了Si含量（3 ~ 5wt%）和B含量（0 ~ 0.25wt%）对合金显微结构和磁性能的影响。对Fe-Si-B合金进行粘结剂喷射印刷，其中烧结温度在1200 ° C和1250 °C之间变化，并且通过表征磁导率、内禀矫顽力、晶粒尺寸和密度来研究微观结构-磁性能关系。Fe-5wt.%在1200 °C烧结的含0.25% B的Si合金具有最高的相对磁导率（4447）和最低的本征磁导率（47.8 A/m）。
Fe–Si alloys are an essential class of soft magnetic materials due to their high magnetic permeability and low hysteresis loss. Increasing the Si content above 3 wt% promotes coarser grain sizes and greater electrical resistivity, thereby enhancing the magnetic properties, such as magnetic permeability and specific loss density. However, the increased silicon content makes the machining challenging. Additive manufacturing technologies enable production of near net shape Fe–Si alloys with high silicon content, practically eliminating the machining challenges. This work investigated the effects of Si content, which ranged from 3 to 5 wt%, and B content, which ranged from 0 to 0.25 wt%, on the microstructure and magnetic properties. The Fe–Si–B alloys were binder jet printed, where the sintering temperature was varied between 1200 and 1250 °C, and microstructure-magnetic property relationships were investigated by characterizing the magnetic permeability, intrinsic coercivity, grain size, and density. The Fe-5wt.%Si alloy with 0.25% B sintered at 1200 °C exhibited the highest magnetic relative permeability (4447) and the lowest intrinsic coercivity (47.8 A/m).