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Investigation of the Dimensional Variation of Microstructures Through the μMIM Process

Author(s)
Fu, G.; Reading, I.; Li, S.G.; Chaturvedi, P.; Tor, Shu Beng; Yoon, Soon Fatt; Fang, Z.P.; Youcef-Toumi, Kamal; ... Show more Show less
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Abstract
The mass production of components with dimensions in the micron and sub-micron range is anticipated to be one of the leading technology areas for the present century and to be of high market potential. Micro metal injection molding (μMIM) has the potential to be an important contributor to this industry as it can produce precise metallic microstructures in large quantities at a relatively low production cost. The μMIM process is a miniaturization of metal injection molding (MIM) methods. The process comprises of four main steps: mixing, injection molding, debinding and sintering. A metallic powder is mixed with a binder system to form the feedstock. The feedstock is then injection molded into the required shape and the binder removed via thermal or other means. The final microstructures are obtained by sintering the remaining powder in a controlled environment. In this work, the dimensional variation of the microstructures, in particular the warpage, roughness and volume variation, at each stage of the μMIM process was quantified and compared. The results of a preliminary study of the sensitivity of warpage of the microstructures to the packing pressure are also reported.
Date issued
2007-01
URI
http://hdl.handle.net/1721.1/35811
Series/Report no.
Manufacturing Systems and Technology (MST)
Keywords
Demolding, Micro Structure, μMIM, Sintering

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