多孔材料因其内部存在大量孔隙而闻名，具有大的比表面积，常应用于催化器、过滤器和减震器。 同时，高 熵合金因其独特的结构而兼具高强度与高韧性。本文以FeCoCrNi高熵合金粉末为原料，氯化钠(NaCl)作为空间保持材 料，采用热压等离子体放电烧结技术(SPS)，制备多孔FeCoCrNi高熵合金，并探究不同影响参数，如孔隙率、孔径和烧结 时间对多孔FeCoCrNi高熵合金力学性能的影响。氯化钠的粒径决定了孔隙的粒径。随着氯化钠含量的增加，合金中的 孔隙率升高，抗压强度下降。在同一孔隙率时，合金的抗压强度随孔径尺寸的降低而升高。在SPS烧结温度650℃、保温 时间40min时，得到孔隙率30%、孔径50μm的试样，其抗压强度为158MPa。 此外，二次烧结(1100℃)能有效提升多 孔材料的抗压强度，且烧结时间越长，提升效果越好。其中，孔隙率30%、孔径50μm的试样经过90min的二次烧结后， 抗压强度达到了656MPa。

 Porous materials are known for the large number of pores in their interior, which have a large specific surface area and are often used in catalysts. Moreover, high-entropy alloys have both high strength and high toughness because of their unique structure. In this paper, a porous high-entropy FeCoCrNi alloy was prepared by sparking plasma sintering (SPS) with sodium chloride (NaCl) as the space holding material. The effects of different parameters, such as porosity, pore size and sintering time, on the mechanical properties of porous FeCoCrNi high-entropy alloys were investigated. The pore size is determined by the size of the sodium chloride. With increasing sodium chloride content, the porosity of the alloy increases, and the compressive strength decreases. At the same porosity, the compressive strength of the alloy increases with decreasing pore size. A compressive strength of 158 MPa is obtained for the sample with a porosity of 30% and a pore size of 50 μm at an SPS temperature of 650 ℃ and a holding time of 40 min. In addition, secondary sintering (1 100 ℃) can effectively improve the compressive strength of porous materials, and the longer the sintering time is, the better the lifting effect. The compressive strength of the sample with 30% porosity and 50 μm pore size reaches 656 MPa after 90 min of secondary sintering.