On Some Rheological Phenomena Occurring During Capillary Flow of Hard-Metal Carbide Powder Compounds

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

On Some Rheological Phenomena Occurring During Capillary Flow of Hard-Metal Carbide Powder Compounds

Popis výsledku v původním jazyce

The rheological investigation is of obvious importance in the understanding of moulding step of PIM technology, both with regards to the flow in the processing machinery and the proper mould filling. This work clarifies certain aspects of the flow properties of hard-metal carbide powder compounds. In order to obtain theoretical values of maximum loading levels of the powder over 15 model relations, often recommended in PIM literature, were tested on the rheological data of various hard-metal carbide powders and binder consisting of LDPE, paraffin, EAA (EVA) and polyethyleneglycol. It was shown that the applicability of these relations is moderate only, mainly due to the complex structure (irregular shape, broad particle size distribution) of the powders. A special attention was put on studying the flow instabilities occurring at high filling levels of the compounds. For this purpose the compounds containing 40, 45, 50 and 55 vol.% of powder were prepared. Carrying capillary rheometer e

Název v anglickém jazyce

On Some Rheological Phenomena Occurring During Capillary Flow of Hard-Metal Carbide Powder Compounds

Popis výsledku anglicky

The rheological investigation is of obvious importance in the understanding of moulding step of PIM technology, both with regards to the flow in the processing machinery and the proper mould filling. This work clarifies certain aspects of the flow properties of hard-metal carbide powder compounds. In order to obtain theoretical values of maximum loading levels of the powder over 15 model relations, often recommended in PIM literature, were tested on the rheological data of various hard-metal carbide powders and binder consisting of LDPE, paraffin, EAA (EVA) and polyethyleneglycol. It was shown that the applicability of these relations is moderate only, mainly due to the complex structure (irregular shape, broad particle size distribution) of the powders. A special attention was put on studying the flow instabilities occurring at high filling levels of the compounds. For this purpose the compounds containing 40, 45, 50 and 55 vol.% of powder were prepared. Carrying capillary rheometer e

Druh

D - Stať ve sborníku

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2001

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

PM 2001 Proceedings

ISBN

-

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

147-152

Název nakladatele

EPMA, Old Bank Buildings

Místo vydání

Bellstone, Shrewsbury SY1, UK

Místo konání akce

Nice, Francie

Datum konání akce

22. 10. 2001

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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