Porous metallic components are known for their multifunctions in a variety of industries. However, the fabrication of porous metal parts via the conventional manufacturing processes, such as metal injection molding and metal sintering, is largely constrained due to their dependency on templates or supports. Additive manufacturing techniques have no such limitations. Binder jetting is a powder-bed-based additive manufacturing technique, and it has the inherent advantages in fabricating high porous components through the pores-by-process approach. In this work, the manufacturing process of porous CoCrFeMnNi high entropy alloy using binder jetting was investigated. Part porosities in the range of 35% to 40% were achieved through binder jetting and subsequent sintering processes. X-ray computed tomography measurement indicated the morphology and size of the pores were uniformly distributed. The average compressive yield strength of the porous samples varied between 42 to 70 MPa, compressive elastic modulus varied between 3 to 12 GPa. Fracture surface investigations revealed transgranular quasi-cleavage fractures to be more dominant. The corrosion resistance of the porous CoCrFeMnNi was found to be comparable to the 316 L equivalent upon optimum sintering parameters. Overall, it is potential candidate for filtration applications.

多孔金属部件在多种行业中以其多功能性而闻名。然而，由于多孔金属部件依赖于模板或支撑件，因此通过诸如金属注射成型和金属烧结之类的常规制造工艺来制造多孔金属部件受到很大的限制。增材制造技术没有这种限制。粘结剂喷射是一种基于粉末床的增材制造技术，它具有通过“按孔进行加工”的方法来制造高孔隙率部件的固有优势。在这项工作中，研究了使用粘合剂喷射法制造多孔CoCrFeMnNi高熵合金的过程。通过粘合剂喷射和随后的烧结工艺，可实现35％至40％的零件孔隙率。X射线计算机断层扫描测量表明，孔的形态和大小均匀分布。多孔样品的平均压缩屈服强度在42至70 MPa之间变化，压缩弹性模量在3至12 GPa之间变化。骨折表面调查显示，经颗粒准劈裂骨折占主导地位。在最佳烧结参数下，发现多孔CoCrFeMnNi的耐腐蚀性与316 L当量相当。总体而言，它是过滤应用的潜在候选者。在最佳烧结参数下，发现多孔CoCrFeMnNi的耐腐蚀性与316 L当量相当。总体而言，它是过滤应用的潜在候选者。在最佳烧结参数下，发现多孔CoCrFeMnNi的耐腐蚀性与316 L当量相当。总体而言，它是过滤应用的潜在候选者。