HOT-PRESSING MIXED CARBIDES OF Ta, Hf, AND Zr

Journal Article · Sun Mar 01 04:00:00 EST 1964 · American Ceramic Society Bulletin (U.S.)

OSTI ID:4085397

Fischer, J J

The effect of hot-pressing parameters (temperature, pressure, and time) on the density and grain size of two mixed carbides, 80% TaC 20% HfC and 80% TaC 20% ZrC (nt.%), was investigated. The purpose of the investigation was to determine what conditions would be necessary to produce high-density bodies and what resultant grain size might be expected for a given set of conditions. The hotpressing was accomplished by means of an inductively heated graphite die body with pressure being supplied by a hydraulic press. Based on the computed theoretical densities, 4TaC . 1HfC was hot-pressed to approximately 100% relative density nt 4800 deg F and 8000 psi in 15 minutes. The maximum density achieved in the 4TaC. 1ZrC composition was 96% relative density under the same conditions. Based on grain size measurements there is evidence of a recrystallizntion temperature for both materials at about 4600 deg F under a hot- pressing pressure of 3700 psi. (auth)

• Research Organization: Lewis Research Center, Cleveland
• NSA Number: NSA-18-014437
• OSTI ID: 4085397
• Journal Information: American Ceramic Society Bulletin (U.S.), Journal Name: American Ceramic Society Bulletin (U.S.) Vol. Vol: 43; ISSN ACSBA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COMPUTERS
DENSITY
DIES
GRAIN SIZE
GRAPHITE
HAFNIUM CARBIDES
HIGH TEMPERATURE
HOT WORKING
HYDRAULICS
INDUCTION
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
MIXING
PRESSURE
RECRYSTALLIZATION
TANTALUM CARBIDES
ZIRCONIUM CARBIDES