Metal Foam Protects From Heat And Explosion Twice As Well As Plain Metal

Metal Foam Protects From Heat And Explosion Twice As Well As Plain Metal

Exposing a pure-steel foam with a structure like this to high heat from one side, the team found that it took eight minutes for a 3cm thick piece to reach 800C throughout. Meanwhile, a slab of plain steel with the same dimensions took four minutes to reach the same temperature. “The presence of air pockets inside CMF make it so effective at blocking heat, mainly because heat travels more slowly through air than through metal,” explained Afsaneh Rabiei, one of the researchers, in a press release.

The team also found that the foam expands 80 per cent less than solid metal as it reaches those high temperatures, and that expansion is much more consistent, too. “Our findings suggest that [metallic foam] can offer extremely good thermal insulation, superior thermal stability, and excellent flame retardant performances as compared to commercially available materials such as stainless steel,” say the team.

[International Journal of Thermal Sciences via PhysOrg]