Accession Number : AD0474087

Title :   EQUILIBRIUM STUDIES OF REFRACTORY NITRIDES. PART I. DETAILS OF THE APPARATUS AND STUDIES OF THE TI-N SYSTEM.

Descriptive Note : Summary technical rept. 1 Jun 64-31 May 65,

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MA

Personal Author(s) : McClaine, Leslie A. ; Coppel, Claude P.

Report Date : SEP 1965

Pagination or Media Count : 72

Abstract : This report describes an apparatus assembled specifically for studies on refractory nitrides. The apparatus provides for measurement of nitrogen pressure as a function of temperature and composition of the nitride sample by a static technique. The titanium nitride phase was studied. Equilibrium nitrogen pressures were determined for nitride compositions ranging from about Ti(.54)N(.46) to Ti(.5) N5. Equilibrium titanium pressures over pure titanium, the alpha-titanium- titanium nitride two phase mixture and a nitride composition of about Ti(.55)N(.45) were determined by a Knudsen technique. These pressure data are related and extended across titanium nitride phase region utilizing thermodynamic theory. Previous work on titanium nitride is reviewed and a consistent account of all the available data is developed. (Author)

Descriptors :   *NITRIDES), (*TITANIUM COMPOUNDS, (*PHASE STUDIES, TITANIUM COMPOUNDS), TITANIUM, VAPOR PRESSURE, THERMODYNAMICS, PYROLYSIS, CRYSTAL LATTICES, X RAY DIFFRACTION, THERMOCHEMISTRY, TABLES(DATA), NOMOGRAPHS, LABORATORY EQUIPMENT, REFRACTORY MATERIALS.

Subject Categories : Physical Chemistry
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE