The cell size effect of closed cellular materials fabricated by pulse current assisted hot isostatic pressing on the compressive behavior

A hot isostatic pressing technique assisted by the pulse current supplied by a spark plasma sintering system was used to fabricate metallic closed cellular materials. Phenol resin spherical particles coated with a Ni–P alloy were sintered using this technique. Cellular nickel alloy samples with different cell sizes were obtained. Compressive tests showed that the compressive strength of this material with a smaller cell size was higher than that with a larger cell size. The addition of fine cells to a coarse cellular structure can improve the compressive strength of the specimen.