Detail publikačního výsledku

Rheological behaviour of hard-metal carbide powder suspensions at high shear rates

HAUSNEROVA B.; SAHA P.; KUBAT J.; KITANO T.; BECKER J.

Originální název

Rheological behaviour of hard-metal carbide powder suspensions at high shear rates

Anglický název

Rheological behaviour of hard-metal carbide powder suspensions at high shear rates

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

The results of an investigation of the flow behaviour of hard-metal carbide powder compounds in a capillary rheometer operating at constant piston speed are presented. The suspensions, consisting of a polymeric binder (PE + paraffin + copolymer EBA, EVA or EAA) and carbide powder, were prepared by melt mixing using a Brabender Plasticorder. The relations of Maron-Pierce, Quemada and Mooney were applied to calculate maximum loading values for the compounds used. Close to the maximum loading the character of the flow changed from pseudoplastic to plug flow. This was accompanied by the appearance of flow instabilities similar to pressure oscillations observed with unfilled polymers. The calculations of the average thickness of the polymer layer bound to the surface of the carbide particles were in fair agreement with microscopic observations.

Anglický abstrakt

The results of an investigation of the flow behaviour of hard-metal carbide powder compounds in a capillary rheometer operating at constant piston speed are presented. The suspensions, consisting of a polymeric binder (PE + paraffin + copolymer EBA, EVA or EAA) and carbide powder, were prepared by melt mixing using a Brabender Plasticorder. The relations of Maron-Pierce, Quemada and Mooney were applied to calculate maximum loading values for the compounds used. Close to the maximum loading the character of the flow changed from pseudoplastic to plug flow. This was accompanied by the appearance of flow instabilities similar to pressure oscillations observed with unfilled polymers. The calculations of the average thickness of the polymer layer bound to the surface of the carbide particles were in fair agreement with microscopic observations.

Klíčová slova

Powder metallurgy ; Injection molding ; Flow(fluid) ; Rheological properties ; Tungsten carbide ; Organic binder ; Suspension ; Capillary flow ; Instability ;

Klíčová slova v angličtině

Powder metallurgy ; Injection molding ; Flow(fluid) ; Rheological properties ; Tungsten carbide ; Organic binder ; Suspension ; Capillary flow ; Instability ;

Autoři

HAUSNEROVA B.; SAHA P.; KUBAT J.; KITANO T.; BECKER J.

Rok RIV

2010

Vydáno

01.01.2000

Nakladatel

Freund

Místo

Tel Aviv, ISRAEL

ISSN

0334-6447

Periodikum

JOURNAL OF POLYMER ENGINEERING

Svazek

20

Číslo

4

Stát

Spojené království Velké Británie a Severního Irska

Strany od

237

Strany do

265

Strany počet

28

BibTex

@article{BUT49601,
  author="HAUSNEROVA B. and SAHA P. and KUBAT J. and KITANO T. and BECKER J.",
  title="Rheological behaviour of hard-metal carbide powder suspensions at high shear rates",
  journal="JOURNAL OF POLYMER ENGINEERING",
  year="2000",
  volume="20",
  number="4",
  pages="237--265",
  issn="0334-6447"
}