Kohútek I., Käerdi H., Kulu P., Sülleiová K., Velgosová O., Mikli V., Besterci M.
PARTICLES MORPHOLOGY DESCRIPTION BY IMAGE ANALYSIS
Abstract
Structural parameters of a compact body made from powder by powder metallurgy depend also on the geometrical characteristics of used powder. Powders produced by various methods are different - not only from the point of view of size but also with respect to the shape.
Description of powders by their geometrical parameters is necessary for evaluation of a suitable production way. By using rich methods and tools for powder morphology description it is possible to evaluate and control the processes of powder production - to choose the optimal method and to set the best conditions for all its steps.
The morphology parameters of particles in the WC-9Co material made by powder metallurgy processes disintegrated after various number of cycles are presented in the paper. Images of the material microstructure were obtained by scanning electron microscopy (SEM) and analysed by two different image analysis systems. The particle morphology was described by the shape characteristics : elongation, dispersion and shape factor.
Relationships of the particle morphology parameters on the number of disintegration cycles were searched. Two collections of results obtained by two research groups (Košice and Tallinn) were compared.
Editors and press
AMS online
