On the modelling of non-monotonous viscosity describing feedstock behaviour in powder injection moulding

Loading...
Thumbnail Image

Date

Authors

Filip, P.
Hausnerova, B.
Cucova, L.

Journal Title

Journal ISSN

Volume Title

Publisher

International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics

Abstract

Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.
Feedstocks used in the process of powder injection moulding characterized by the flow of highly filled (60 vol.%) compound into a mould cavity, sometimes exhibit non- monotonous flow behaviour of viscosity in dependence on shear rate. A new 7-parameter rheological model was proposed and applied to the feedstock based on aluminium oxide powder and multicomponent partly water-soluble polymeric binder. Structural changes of the feedstock caused by shear deformation were quantified in terms of yield stresses obtained using the classical monotonous Herschel-Bulkley and Casson models. Unlike these models the newly proposed 7-parameter rheological model is valid in the whole shear rate range measured.

Description

Keywords

Feedstocks, Powder injection moulding, Powder injection, Non- monotonous flow behaviour, Viscosity, Aluminium oxide powder, Herschel-Bulkley, Casson model, 7-parameter rheological model

Sustainable Development Goals

Citation

Filip, P, Hausnerova, B & Cucova, L 2012, On the modelling of non-monotonous viscosity describing feedstock behaviour in powder injection moulding, Paper presented to the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.