Accession Number:

AD0277500

Title:

THERMODYNAMIC AND KINETIC STUDIES FOR A REFRACTORY MATERIALS PROGRAM

Descriptive Note:

Corporate Author:

LITTLE (ARTHUR D) INC SAN FRANCISCO CALIF

Personal Author(s):

Report Date:

1962-04-01

Pagination or Media Count:

85.0

Abstract:

HIS R PORT SUMMARIZES AN INTEGRATED PROGRAM OF STUDIES CONCERNING THERMODYNAMIC AND KINETIC KNOWLEDGE NEEDED TO DESCRIBE THE CHEMICAL BEHAVIOR OF ZIRCONIUM AND HAFNIUM CARBID S D BORIDES AT TEMPERATURES TO 3000K and in atmospheres of O2, O2 H2O, Cl2, HF, F2 H , CO, NH , A D N2 Both internal and subcontracte fforts are used which can 1 provide, through calorimetric measurements, additional thermodynamic data n e ed for the tabula ion of free rgy functions of the zirconium and hafnium carbides and borid s 2 identify, by mass spectrometric means, gaseous species formed on vaporization of these c rbides and borides and on their interaction with the several atmospheres 3 provide thermodynamic data for important gaseous species t rough l ctron iffraction t chniques, ma rix isolation spectroscopy, and equilibria studies and 4 develop the kinetic of the reactions of the carbides and borides with the various tmospheres throug s udies of the over-all rates of reactions and m ss transport mechanisms. Author

Descriptors:

• CONTROLLED ATMOSPHERES
• DIFFUSION
• ELECTRON DIFFRACTION
• ENTHALPY
• GAS FLOW
• HALIDES
• HIGH TEMPERATURE
• MASS SPECTROSCOPY
• PREPARATION
• REACTION KINETICS
• SPECTROGRAPHY
• SPECTRUM ANALYZERS
• THERMODYNAMICS
• TRANSPORT PROPERTIES
• VAPORIZATION
• ZONE MELTING

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE