Abstract
A preliminary investigation of the pressure-densification behaviour of iron and nickel powders both with and without added alumina or zirconia particles has been made. The importance of some relevant parameters is assessed in the light of experimental results obtained on different powder composites, prepared by mechanical mixing of powders followed by compaction in a die using a hydraulic press.
The degree of pressure-densification decreases with increasing volume fraction of the added oxide particles, the decrease being also a function of the matrix and oxide particle-size ratio. These data are interpreted in terms of reductions in the number and area of the contact surfaces deforming as a result of the presence of non-deforming particles.
Get full access to this article
View all access options for this article.