HOT PRESSING OF TUNGSTEN POWDER,
Abstract
A hot pressing study was conducted on three grades of tungsten powder to delineate the effect of a dispersed second phase and initial powder particle size on the hardness, densitty and grain size of the final product. Hot pressing was conducted in ATJ graphite dies under pressures up to 8000 psi and at temperatures form 1400 to 1800 C (2550 to 3270 F). Holding time at temperature and pressure ranged from 30 minutes to 2 hours. The pellets were pre-cold pressed to 55% theoretical density. The formation of the tungsten-carbide case, inherent for hot-pressing in graphite, was followed as a function of time, temperature, pressure, and initial powder particle size. Grain growth and dispersed phase stability of hot pressed tungsten was evaluated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 22, 1963
- Accession Number
- AD0424203
Entities
People
- J. E. White
- M. M Jurkowitz
Organizations
- The Aerospace Corporation