New material was created in Hiroshima nuclear explosion
Rapid cooling locked in unusual crystal structure in silicon-rich metal alloy The post New material was created in Hiroshima nuclear explosion appeared first on Physics World .
A new metal alloy was recently identified and documented in a piece of hiroshimaite, a material created from the explosive force of the atomic bomb detonated over Hiroshima in 1945. The study, conducted by a team of scientists from Italy, the US, and Switzerland, was led by physicist Luca Bindi, who has previously discovered other unique materials in nuclear explosion debris.
The hiroshimaite is primarily composed of calcium, aluminum, and silicon, and was formed as the fireball produced by the bomb rapidly condensed and cooled. This turbulent plasma included debris from buildings, metals, water, and some of the city's residents, all of which condensed into micrometer to millimeter-sized glassy particles that rained down on the Hiroshima area.
In this latest research, the newly discovered alloy is a homogenous mixture of six metals and silicon, with an unusual crystal structure that sets it apart from any previously known material. The alloy's formation is attributed to the condensation of a complex metallic vapor created by the nuclear fireball. As the fireball cooled rapidly, a tiny droplet of metals and silicon condensed from this plasma, solidifying under extreme conditions and freezing its metastable crystal structure – a process that prevented the alloy from evolving into a more common crystal structure.
Bindi's discovery of this new material in hiroshimaite not only helps scientists understand how matter behaves under extreme conditions but also serves as a testament to the unique insights that can be gained from examining the aftermath of nuclear explosions.
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