Use of ram extruder as a combined rheo-tribometer to study the behaviour of high yield stress fluids at low strain rate

A Perrot, Y Mélinge, D Rangeard, F Micaelli, P Estellé… - Rheologica acta, 2012 - Springer
We propose in this work to provide an efficient and simple extruder device able to evaluate
the rheological and tribological behaviour of high yield stress fluids, such as extrudible …

Mechanisms underlying the limited injectability of hydraulic calcium phosphate paste

M Habib, G Baroud, F Gitzhofer, M Bohner - Acta Biomaterialia, 2008 - Elsevier
Calcium phosphate (CaP) cements are being increasingly used for minimally invasive hard
tissue implantation. Possible approaches to improve the bad injectability of hydraulic …

Prediction of extrusion load and liquid phase filtration during ram extrusion of high solid volume fraction pastes

H Khelifi, A Perrot, T Lecompte, D Rangeard… - Powder Technology, 2013 - Elsevier
For perfect and homogeneous plastic materials, the extrusion stress and flow typology have
previously been well described. However for firm pastes, during extrusion, liquid phase …

Effects of liquid phase migration on extrusion of microcrystalline cellulose pastes

SL Rough, J Bridgwater, DI Wilson - International journal of pharmaceutics, 2000 - Elsevier
The behaviour of water-based microcrystalline cellulose pastes undergoing ram extrusion
has been investigated. Factors affecting the redistribution of water within the extruding paste …

Extrusion criterion for firm cement-based materials

A Perrot, D Rangeard, Y Melinge, P Estelle… - Applied …, 2009 - degruyter.com
The stability of the flow induced by the extrusion forming process of a cement based material
is largely influenced by the relative migration between the lubricating liquid phase and the …

Paste extrusion of polytetrafluoroethylene (PTFE): Surface tension and viscosity effects

I Ochoa, SG Hatzikiriakos - Powder technology, 2005 - Elsevier
The effects of the lubricant physical properties on the processing of polytetrafluoroethylene
(PTFE) fine powder resins are studied. Lubricants having different surface tension and …

Paste extrusion of polytetrafluoroethylene (PTFE) fine powder resins

SG Hatzikiriakos, AB Ariawan… - The Canadian Journal …, 2002 - Wiley Online Library
The rheology of non‐melt processible polytetrafluoroethylene (PTFE) pastes has been
studied using a capillary rheometer. It was found that fibrils of submicron dimensions are …

Prediction of the ram extrusion force of cement-based materials

A Perrot, D Rangeard, Y Mélinge - applied rheology, 2014 - degruyter.com
The aim of this study is to propose a theoretical frame that is able to lead someone to an
appropriate way of modeling cementbased material extrusion. It clearly appears that …

Rheology and processing of polytetrafluoroethylene (PTFE) paste

T Tomkovic, SG Hatzikiriakos - The Canadian Journal of …, 2020 - Wiley Online Library
This is a review article on the paste extrusion of polytetrafluoroethylene (PTFE). The article
begins with an overall presentation of the process. Important aspects related to this process …

Preforming behavior of polytetrafluoroethylene paste

AB Ariawan, S Ebnesajjad, SG Hatzikiriakos - Powder technology, 2001 - Elsevier
Due to its high melting point, polytetrafluoroethylene (PTFE) is processed by a number of
unusual techniques including paste extrusion. The paste extrusion process is carried out at …