KINETICS OF THE REACTION OF ELEMENTAL FLUORINE WITH ZIRCONIUM CARBIDE AND ZIRCONIUM DIBORIDE AT HIGH TEMPERATURES

Conference · Sun Sep 15 04:00:00 EDT 1963

OSTI ID:4878083

Kuriakose, A. K.; Margrave, J. L.

The reaction between ZrC and F/sub 2/ was investigated at 278 to 410 deg C, using 31 mm HgF/syb 2/. The reaction was found to be linear with time, and linear rate constants were computed. The activation energy was determined to be 22.1 plus or minus 1.6 kcal/mole. ZrB/sub 2/ is not attacked by 31 mm HgF/sub 2/ below 500 deg C. The weight losses from reaction of ZrB/sub 2/ with F/sub 2/ at 600 to 900 deg C and of ZrC with F/sub 2/ at 700 to 950 deg C, were rneasured for a F/sub 2/ pressure of 2.7 mm Hg. Zero-time linear rate constants were calculated and found not to be strongly temperature-dependent above 600 deg C, and the activation energies are essentially zero for both ZrB/sub 2/ and ZrC. For ZrC at 350 deg C and for ZrB/sub 2/ at 700 deg C, the rate is approximately proportional to the square root of F/sub 2/ partial pressure, while for ZrC at 700 deg C, it is proportional to the 1.5 power of F/sub 2/ partial pressure. (D.L.C.)

• Research Organization: Univ. of Wisconsin, Madison, WI (United States)
• Sponsoring Organization: Sponsor not identified
• NSA Number: NSA-18-003793
• OSTI ID: 4878083
• Report Number(s): CONF-184--2; AED-Conf--63-151-7
• Country of Publication: United States
• Language: English

Related Subjects

ACTIVATION ENERGY
CHEMICAL REACTIONS
CHEMISTRY
FLUORINE
HIGH TEMPERATURE
MERCURY FLUORIDES
REACTION KINETICS
THERMODYNAMICS
ZIRCONIUM BORIDES
ZIRCONIUM CARBIDES