Production of Metallic Foam Precursors Using Current‐Activated Pressure‐Assisted Densification

The production of metallic foams is influenced by many aspects. Among other factors, compaction plays an important role in the powder metallurgical production of foamable precursors. A powder compaction metallurgical method, known as current‐activated pressure‐assisted densification (CAPAD), is applied to enhance the compaction of metal foam precursors. This method improves precursor quality by achieving higher density, lower electrical resistivity, and more uniform pore nucleation in the resulting foams. Changes in the microstructure, constituents’ distribution, and their influence on the foam nucleation and expansion behavior are investigated. Compared to traditional uniaxial hot pressing (UHP) methods, CAPAD operates at significantly lower pressures than UHP, reducing energy consumption and processing time. The reduced operational demands and improved material properties highlight CAPAD's potential as a cost‐effective and efficient alternative to conventional compaction techniques.