Determination Of The Slope Of The Phase-Equilibrium Line By Lagrangian Gauges In Shock Waves.pdf

Combustion, Explosion, and Shock Waves, Vol. 37, No. 2, pp. 225–229, 2001
Determination of the Slope
of the Phase-Equilibrium Line
by Lagrangian Gauges in Shock Waves
A. M. Molodets1 UDC +:
Translated from Fizika Goreniya i Vzryva, Vol. 37, No. 2, pp. 116–120, March–April, 2001.
Original article submitted December 24, 1999; revision submitted March 21, 2000.
A new idea is proposed for the experimental technique that allows determination of
the pressure derivative with respect to temperature at the point of intersection of the
shock adiabat and the line of equilibrium of two phases in the pressure–temperature
coordinates. The measured quantities are estimated using a particular example of
polymorphic transformation of white tin in shock waves.
INTRODUCTION pression was measured by Lagrangian tem-
perature gauges, which are based on the effects of ther-
mal resistance and thermal electricity [4–6].
It is well-known that shock-wave loading of con-
densed media allows one to obtain hardly reachable sec- Measurement techniques based on registration of
tors of phase diagrams of a substance, which are lo- thermal radiation of the pressed material are
cated in the region of high temperatures and pressures. more frequently used. The pression temper-
In a certain vicinity of intersection of the shock adi- ature is mainly measured at the fron