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Rheological investigation of water atomised Metal Injection Molding (MIM) feedstock for processbility prediction

Jamaludin, Khairur Rijal and Muhamad, N. and Ab. Rahman, M. N. and Murtadhahadi, I and Amin, S. Y. M. and Ahmad, S. and Ibrahim, M. H. I. and Nor, N. H. M. (2008) Rheological investigation of water atomised Metal Injection Molding (MIM) feedstock for processbility prediction. In: Advances in Materials and Processing Technologies (AMPT) conference 2008, 2-5 November 2008, Manama, Kingdom of Bahrain.

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Abstract

This paper presents the rheological properties of SS316L water atomized MIM feedstock. Coarse and fine SS316L water atomized powder is mixed with a composite binder consisting of PMMA and PEG to form a homogenous paste, termed as feedstock. The feedstock is loaded with SS316L water atomized powder at volumes ranging 62, 62.5, 63, 63.5 and 64 percentages. However, due to the morphology of the water atomized powder which is not spherical compared to the gas atomized ones, fine powder feedstock is unable to produce any significant rheological result due to the powder loading being more than 63.5 v/o. Results show that the fine powder feedstock demonstrates a higher viscosity if compared to the coarse powder feedstock. It can be established that binder separations are likely to occur in the coarse powder feedstock, especially, at high temperatures. The investigation concludes that the fine powder feedstock has its best rheological properties at 62 v/o while the coarse powder feedstock lies between 63 and 63.5 v/o.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Composite binder, SS316L water atomized powder, rheological properties, powder loadings
Subjects:T Technology > TS Manufactures
Divisions:Mechanical Engineering
ID Code:6883
Deposited By: Khairur Rijal Jamaludin
Deposited On:16 Nov 2008 12:34
Last Modified:01 Jun 2010 15:48

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