熔融碳酸盐燃料电池阳极用多孔铜镍铝合金的制备及其压缩性能

Preparation and Compressive Property of Porous Cu-Ni-Al Sintered Alloys Used for Molten Carbonate Fuel Cell Anode

采用雾化法制得铜镍铝粉体,并对其进行热压烧结,制备了熔融碳酸盐燃料电池阳极用多孔铜镍铝烧结体,研究了铜镍铝雾化粉的形貌及其烧结体的显微组织、压缩性能,并对多孔烧结体孔隙形貌进行了有限元模拟。结果表明:采用雾化法制得的铜镍铝粉体颗粒为近球形,平均粒径为39μm,其粒度变化区域较小且比较集中,主要由铜相和AlNi相组成;烧结体的成形完整,抗压强度为10MPa,粉体颗粒之间结合紧密,孔洞为通孔和开孔;孔隙形貌对多孔铜镍铝合金烧结体的结构影响很大,孔的边数越多,多孔铜镍铝合金的结构越不稳定;在相同的载荷下,三角形孔的压缩量最小,圆形孔的压缩量最大。

Cu-Ni Al powders obtained by atomized technology were used to prepare porous Cu-Ni-AI sintered alloy used for moiten carbonate fuel cell through hot press sintering technology. The morphology of Cu-Ni-A1 spray powders and compressive property of the sintered alloys were studied, and the finite element method were used to study the morphology of porous sintered alloy. The results show that the average size of Cu-Ni-A1 spray powders prepared by atomized technology was 39μm, pardcle size distribution was very narrow and the morphology of the powders was almost nearly spherical. The powders were consisted of Cu phase and AINi phase. The forming of Cu-Ni-A1 sintered alloy prepared by hot pressing sintering was integrated, the compressive strength was 10 MPa, particles in the sintered alloy were tightly combined, and the pores displayed connected and open holes. The pore morphology had a great effect on the structure of porous Cu-Ni-A1 sintered alloy. The more the pore edges number, the less stable structure the alloy. Under the same loading, the compression of triangle pores was minimum and that of circular pores was maximum.