Article | REF: N3800 V1

Metal foams. Structures and processing routes

Author: Jonathan DAIRON

Publication date: March 10, 2015, Review date: January 29, 2021

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2. Manufacturing techniques

Since the 1950s, numerous processes have been developed to manufacture metal foams. Several classifications can be used to group them together. For example, the physical state of the metal during shaping (liquid, solid, gaseous or ionic) could be a classification criterion. In this section, we have preferred to group these processes according to the physical principles they call upon, even if their practical implementation may differ. This allows us to present the said principles for each of these groups of processes, before going on to describe the various existing implementations.

2.1 Foaming liquid metal

Foaming processes produce (solid) metal foam by forming a liquid metal foam, which is then solidified. The liquid foam is produced by introducing gas into...

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