On the modelling of non-monotonous viscosity describing feedstock behaviour in powder injection moulding
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Authors
Filip, P.
Hausnerova, B.
Cucova, L.
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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.
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.
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Keywords
Feedstocks, Powder injection moulding, Powder injection, Non- monotonous flow behaviour, Viscosity, Aluminium oxide powder, Herschel-Bulkley, Casson model, 7-parameter rheological model
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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.