Three-dimensional numerical modeling of segregation in powder injection molding

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Proceedings titleAdvances in Powder Metallurgy & Particulate Materials-2009
Conference2009 International Conference on Powder Metallurgy & Particulate Materials (PowderMet 2009), June 28-July 1, 2009, Las Vegas, Nevada, USA
Issue4-Powder Injection Molding (Metals and Ceramics)
AbstractThe ability to predict segregation of the solid phase in processes such as powder injection molding and injection molding of semi-solid materials is of special interest since such phenomenon affects the final properties and characteristics of the molded parts. In pwder injection molding, for example, defects appear very often in the debinding and sintering stages but are caused by filling problems and determined by a non-uniform distribution of the solid particles within the molded part. In this paper we present the results obtained by a 3D numerical solution algorithm for the simulation of particle migration in dense suspensions. The particle migration is modeled using the diffusion flux model and integrated into the NRC's 3D injection molding software. The solution algorithm is first validated by solving flow problems for which experimental and numerical data are available. Then, the approach is applied to injection molding problems and the segregation inside the molded parts is studied.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NRC number52325
NPARC number18398979
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Record identifier6fd46633-1dab-45df-ac56-2a113c348bb7
Record created2011-08-16
Record modified2016-05-09
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