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Copper beats 2,595°F to defy earlier models in US fusion reactor test
Interesting Engineering • • general
Key Points:
- Scientists at SLAC National Accelerator Laboratory discovered that copper melts gradually under extreme heat, contradicting previous computer models predicting sudden collapse at the superheating limit.
- Using SLAC’s MeV-UED electron camera, researchers observed real-time atomic movements in copper films heated by lasers, revealing steady melting and pre-melting at grain boundaries before reaching the standard melting point.
- The study showed that dynamic pressure conditions during heating allow copper atoms to shift and maintain structural order beyond the theoretical superheating limit, a factor missing in earlier static-pressure simulations.
- Incorporating these dynamic conditions into models significantly improves their accuracy, enhancing predictive capabilities for materials used in fusion reactors and other extreme thermal environments.
- These findings support the development of fusion power plants by improving understanding of material behavior under rapid heating, with future research planned on copper alloys and balanced pressure scenarios.
