The activated sintering and hot-pressing of electrowon tungsten powder
AuthorGourley, John W.
Mining and Metallurgical Engineering
StatisticsView Usage Statistics
The effects of time, temperature, powder blending, and additions of up to 1% ZrH and Ni on the hot-pressed density of electrowon powder were studied. Significant findings were: the large particle size and shape effectively prevented electrowon powder from sintering to a high density by hot-pressing at 4500 psi and 2300°C. Densities in excess of 90$ theoretical were obtained by blending up to 50 weight percent 2.7 micron tungsten powder with electrowon powder. ZrH was found to be a poor activating agent for the hot- pressing technique. Liquid nickel, present in amounts as small as 0.1 weight percent, significantly increased, the densification rate of tungsten compacts.
Online access for this thesis was created in part with support from the Institute of Museum and Library Services (IMLS) administered by the Nevada State Library, Archives and Public Records through the Library Services and Technology Act (LSTA). To obtain a high quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.