METHOD OF PRODUCTION AND SOME PROPERTIES OF A NEW TYPE OF ULTRAFINE PARTICLES

Abstract

A micro-rolling method for the production of fine metallic particles in the size range 0.05–5μm is described, together with ancillary equipment for the separation and collection of predetermined size fractions. The material produced is a flake form of high (up to 100: 1) breadth :thickness ratio and is suitable for applications such as dispersion-hardening and for many operations that involve pressing and sintering procedures.

Details are given of particle shape and size distribution for two typical products, aluminium flake and tungsten flake. Some physical properties of specimens produced from these materials are also cited. Reference is made to other products of the mill, both metallic and non-metallic, and to future development work in relation to these materials.