Expansion into vacuum of a shocked tungsten carbide-epoxy mixture.

Reinhart, William Dodd ; Thornhill, Tom Finley, III ; Vogler, Tracy John ; Alexander, C. Scott

Sandia National Laboratories

关键词: Epoxy Compounds.;    Tungsten Carbides;    Evaporation;    37 Inorganic, Organic, Physical And Analytical Chemistry;    Expansion;   

DOI  :  10.2172/983671
RP-ID  :  SAND2009-0859
RP-ID  :  AC04-94AL85000
RP-ID  :  983671

美国|英语

来源: UNT Digital Library

【 摘 要 】

The behavior of a shocked tungsten carbide / epoxy mixture as it expands into a vacuum has been studied through a combination of experiments and simulations. X-ray radiography of the expanding material as well as the velocity measured for a stood-off witness late are used to understand the physics of the problem. The initial shock causes vaporization of the epoxy matrix, leading to a multi-phase flow situation as the epoxy expands rapidly at around 8 km/s followed by the WC particles moving around 3 km/s. There are also small amounts of WC moving at higher velocities, apparently due to jetting in the sample. These experiments provide important data about the multi-phase flow characteristics of this material.