Accession Number:

AD0601424

Title:

THERMODYNAMIC AND KINETIC STUDIES FOR A REFRACTORY MATERIALS PROGRAM

Descriptive Note:

Corporate Author:

LITTLE (ARTHUR D) INC CAMBRIDGE MA

Personal Author(s):

• McClaine, T. A.

Report Date:

1964-04-01

Pagination or Media Count:

236.0

Abstract:

Work presented includes preparation of borides and carbides low temperature heat capacity measurements on HfB2, HfC and hafnium metal estimation of entropies at 298K for refractory diborides, nitrides, carbides, and oxides from high temperature heat content data current status of heats of formation of the borides and carbides from oxygen and fluorine bomb calorimetry and studies proving the feasibility of the matrix isolation technique for spectroscopy of high temperature molecules through studies on the Lithium halides. Status of electron diffraction, equilibria, and heat of solution studies of the hafnium and zirconium halides is presented. Kinetic studies completed on the oxidation and fluorination of the hafnium and zirconium carbides and diborides are presented in detail. From ac and dc electrical conductivity studies on tetragonal ZrO2, a model of the defect structure is devised and oxygen diffusion in ZrO2 is calculated. Author

Descriptors:

• *HAFNIUM COMPOUNDS
• *REACTION KINETICS
• *REFRACTORY MATERIALS
• *ZIRCONIUM COMPOUNDS
• BORIDES
• CARBIDES
• CHEMICAL EQUILIBRIUM
• CHEMICAL REACTIONS
• CRYSTAL DEFECTS
• ELECTRICAL CONDUCTIVITY
• ELECTRON DIFFRACTION
• FLUORINATION
• HAFNIUM
• HALIDES
• HEAT OF FORMATION
• HEAT OF SOLUTION
• LITHIUM COMPOUNDS
• NITRIDES
• OXIDATION
• OXIDES
• SPECIFIC HEAT
• SPECTROSCOPY
• THERMODYNAMICS

Subject Categories:

• Inorganic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE