The Role of Oxidation During Compaction on the Expansion and Stability of Al Foams Made Via a PM Route

Abstract

The foam expansion and collapse behaviour for hot compacted Al‐TiH 2 precursors has been shown to be driven by the oxidation of the Al powder and the premature loss of gas from the TiH 2 foaming agent during the compaction process. At 550 °C, oxidation is rapid, and gas loss from the hydride is extensive leading to poor expansion.