Viscosity Analysis of Copper Powder Mixed with Palm Stearin Based Binder

Abstract:

In this experimental work, the viscosity of copper powder mixed with developed binder system based on palm stearin were studied and analyzed by means of rheological test. The feedstock is limited to 65 vol% of copper powder and 35 vol% of binder system; each of which consists of palm stearin (PS) and polyethylene (PE) prepared in four distinct formulations; 50 wt.% PS, 60 wt.% PS, 70 wt.% PS and 80 wt.% PS. Both copper powder and binder system were initially mixed to produce four sets of homogeneous feedstock. The rheological characterizations of the feedstock which includes its viscosity, pseudo-plasticity, shear sensitivity index (n), and yield stress were analyzed by using Rosand RH2000 Capillary Rheometer at a temperature of 150°C. Finally, the moulded parts were immersed in the n-heptane solution for 7 hours. The morphology analysis by Scanning Electron Microscope (SEM) by means of Hitachi SU 3500 Scanning Electron Microscope were carried out at the end of every stage. The study has shown clearly that PS plays several important roles in the composite binder system.

• Periodical: Applied Mechanics and Materials (Volume 660)
• Pages: 259-264
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.660.259
• Online since: October 2014
• Authors: Nor Amalina Nordin*, Izyan Rabzi, Nor‘aini Wahab, Aidah Jumahat, Muhammad Hussain Ismail
• Keywords: Copper, Metal Injection Moulding, Palm Stearin Binder, Rheology

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