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Rheological characterization of water atomised stainless steel powder for micro metal injection molding

Ibrahim, Mohd Halim Irwan and Muhamad, N. and Jamaludin, Khairur Rijal (2009) Rheological characterization of water atomised stainless steel powder for micro metal injection molding. In: The International Conference on Advances in Materials and Processing Technologies, 26-28 October 2009, Kuala Lumpur, Malaysia.

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Abstract

In this paper, the performance of feedstock characteristics for micro metal injection molding (µMIM) is investigated by optimum power loading variation and rheological characterization. Due to the highly stringent characteristics of µMIM’s feedstock, the study has been emphasized on the powder and binder system in which stainless steel SS316L powder are mixed with composite binder, which consists of PEG (Polyethelena Glycol), PMMA (Polymethyl Methacrilate) and SA (Stearic Acid) by variation of powder loading concentration. The rheology properties are investigated using Shimadzu Flowtester CFT-500D capillary rheometer. The geometry of water atomised stainless steel powder are irregular shape, therefore it is expected significant changes in the rheological results that can influence the microcomponent, surface quality, shape retention and resolution capabilities. The optimization of the µMIM rheological properties as a function of stainless steel powder loading concentration are evaluated by flow behavior exponent, activation energy and moldability index. Results show that 61.5%vol contributes a significant stability over a range of temperature and the best powder loading from a critical powder volume percentage (CPVP) and rheological point of view

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:micro metal injection molding, water atomised metal powder, rheological characteristics, critical powder volume percentage.
Subjects:T Technology > TS Manufactures
Divisions:Mechanical Engineering
ID Code:9776
Deposited By: Khairur Rijal Jamaludin
Deposited On:29 Mar 2010 05:51
Last Modified:02 Jun 2010 02:03

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