Acoustic‐Pressure‐Assisted Engineering of Aluminum Foams

Foaming metals modulates their physical properties, enabling attractive applications where lightweight, low thermal conductivity or acoustic isolation are desirable. Adjusting the size of bubbles in foams is particularly relevant for targeted applications. Here we provide a method with detailed theoretical understanding how to tune aluminium melts in-situ via pressure. Our description full agreement high-rate three-dimensional X-Ray radioscopy bubble formation. We complement our study intriguing results on effect foaming electrical resistivity, Seebeck coefficient and from cryogenic room temperature. Compared bulk materials investigated foam shows an enhancement thermoelectric figure merit. These herald promising application thermoelectrics devices energy conversion.