Accession Number : AD0655640

Title :   ULTRASONIC EQUATION OF STATE OF TANTALUM.

Descriptive Note : Technical rept.,

Corporate Author : CASE INST OF TECH CLEVELAND OHIO

Personal Author(s) : Chechile,R. A.

Report Date : MAY 1967

Pagination or Media Count : 24

Abstract : The pressure derivatives of the elastic constants of a single tantalum crystal have been measured at room temperature by the ultrasonic pulse-echo technique. The values are: dC11/dP = 4.54 dC/dP = 1.03 dC prime/dP = 1.01 dBS/dP = 3.19. The notation C = C44, C prime = (C11 - C12)/2, BS = (C11 + 2C12)/3 has been used. The result expressed as the equation of state, = delta V/Vo = 0.526 x 10 to the -3 power - 0.581 x 10 to the -6 power P squared (pressure in kbar), agrees with the Bridgman 1949, 30 kbar, compression result when this is corrected by using the ultrasonic coefficients of iron. (Author)

Descriptors :   (*EQUATIONS OF STATE, ULTRASONIC PROPERTIES), (*TANTALUM, COMPRESSIVE PROPERTIES), TEMPERATURE, STANDARDS, SINGLE CRYSTALS, MECHANICAL PROPERTIES, MEASUREMENT, IRON

Subject Categories : Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE