We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Processing model for tungsten powders and extension to nanoscale size range.
- Authors
German, Randall M.; Ma, J.; Wang, X.; Olevsky, E.
- Abstract
Nanoscale tungsten powders promise access to very hard, strong and wear resistant materials via the press–sinter route. A small particle size changes the response during sintering, requiring lower temperatures and shorter times to attain dense but small grain size structures. On the other hand, oxide reduction and impurity evaporation favour high sintering temperatures and long hold times. Accordingly, press–sinter processing encounters conflicting constraints when applied to small particles. Presented here is an analysis of press–sinter tungsten particle processing to isolate conditions that balance the temperature and size dependent effects. The calculations are pinned by existing data. Opportunities are identified for new consolidation approaches to deliver a small grain size in a full density structure.
- Subjects
METAL powders; TUNGSTEN; SINTERING; HEAT treatment of metals; NANOSTRUCTURES
- Publication
Powder Metallurgy, 2006, Vol 49, Issue 1, p19
- ISSN
0032-5899
- Publication type
Article
- DOI
10.1179/174329006X94690