Accession Number:

ADA114869

Title:

Thermodynamics of High Temperature Materials.

Descriptive Note:

Annual rept. 1 Oct 81-1 Apr 82,

Corporate Author:

NATIONAL BUREAU OF STANDARDS WASHINGTON DC

Report Date:

1981-09-01

Pagination or Media Count:

107.0

Abstract:

Heat capacity and electrical resistivity of graphite have been measured in the range of 2500 to 3600 K. Thermal expansion of tantalum has been measured in the range of 1500 to 3200 K. Radiance temperature at 653 nm of tungsten at its melting point has been determined. The enthalpy of graphite has been determined from 273 to 1173 K. The thermodynamic properties of diatomic molecules at elevated temperatures have been investigated and a formalism developed to include contributions from both the continuum states and the metastable states associated with rotational barriers. The determination of barriers to internal rotation for inorganic species has been reviewed.

Subject Categories:

  • Metallurgy and Metallography
  • Miscellaneous Materials
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE