Selective laser melting (SLM) or Laser-based powder bed fusion (LBPF) is gaining much attention for the fabrication of novel materials with complex shapes, improved functionalities, and properties. An attempt has been made to fabricate hard and brittle silicon via SLM in the absence of any cracks. Two different powder batches were used, where one of the powder batches has 0.3wt％ Fe and the other batch with 0.02wt％ Fe. The parameter optimization process shows that the SLM Si samples were successfully fabricated from the powders with the minor addition of Fe. The deliberate addition of Fe facilitates heterogeneous nucleation of Si and aids in absorbing the laser energy beam more efficiently. SLM Si samples with 98.5％ theoretical density were fabricated with a hardness of around 10.65±40 GPa. The experimental results show that SLM can successfully fabricate Si without cracks and with near theoretical density (of 99％) and complex shapes, which opens their use in wider industrial applications.

LAI Zhouyi;GUO Ting;ZHANG Shengting;KOLLO Lauri;ATTAR Hooyar;WANG Zhi;PRASHANTH Konda Gokuldoss

Sino-German Robotics School,Shenzhen Institute of Information Technology,Shenzhen 518172,China;School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China;Centre for Advanced Materials Processing and Manufacturing,School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,Queensland 4072,Australia;Department of Mechanical and Industrial Engineering,Tallinn University of Technology,Tallinn 19086,Estonia;Erich Schmid Institute of Materials Science,Austrian Academy of Sciences,Leoben A-8700,Austria;Centre for Biomaterials,Cellular and Molecular Theranostics,Vellore Institute of Technology,Vellore,Tamil Nadu 632014,India

武汉理工大学学报（材料科学版）（英文版）

[1]LAI Zhouyi;GUO Ting;ZHANG Shengting;KOLLO Lauri;ATTAR Hooyar;WANG Zhi;PRASHANTH Konda Gokuldoss-.Selective Laser Melting of Commercially Pure Silicon)[J].武汉理工大学学报（材料科学版）（英文版）,2022(06):1155-1165

LBPF

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