Britte reaction of a high-temperature ion melt
Physikalisch-Vulkanologisches Labor - Pleicherwall 1, D-97070 Würzburg, Germany
Accepted: 20 March 1997
An experimental study on explosive interaction between transparent melt () and entrapped water () has been performed. Intense explosions occurred, resulting from catastrophic fragmentation of the melt and increasing heat transfer to the water in a cascading process. In earlier experiments a quasi-isochoric brittle reaction of the melt was identified to be the major explosion mechanism. Using a transparent melt, this brittle reaction could directly be observed by high-speed cinematography. The pictures revealed two fragmentation mechanisms: a) formation of leading cracks (mm to cm scale) due to excess water pressure, and b) slower scaled melt fragmentation induced by strain build-up in the melt during rapid cooling.
PACS: 62.10.+s – Mechanical properties of liquids / 62.20.Mk – Fatigue, brittleness, fracture, and cracks / 46.30.Nz – Fracture mechanics, fatigue, and cracks
© EDP Sciences, 1997