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Superheated Gold Stays Solid Well Past Its Predicted Melting Point
UNIVERSITY OF NEVADA, RENO AND SLAC NATIONAL ACCELERATOR LABORATORY, JUL 23 – Researchers used ultra-fast lasers to heat gold to 14 times its melting point without melting, challenging a 40-year-old physics limit known as the entropy catastrophe.
- Using ultra-fast lasers, the team heated a 50-nanometre gold film to over 14 times its melting point while remaining solid.
- Grounded in the second law, the entropy catastrophe set a three-times melting point limit under the second law of thermodynamics.
- Using ultrafast techniques, laser pulses heated the gold film, X-ray thermometry measured temperature, and rapid heating prevented expansion, according to Bob Nagler.
- The breakthrough overturns 40 years of physics, Bob Nagler called the work `a decades-long problem` solved.
- In the near future, researchers extend the technique to other metals, field could heat up in the near future, applications cover spaceflight and beyond.
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Superheated gold stays solid well past its predicted melting point
Heating that lasted only trillionths of a second raised a gold sample’s temperature to 19,000 K without melting it, a study suggests. Heating that lasted only trillionths of a second raised a gold sample’s temperature to 19,000 K without melting it, a study suggests.
·United Kingdom
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