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Microcasting of Al bronze and a gold base alloy improved by plaster-bonded investment

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Abstract

Microcasting based on the investment casting process is a suitable method to shape various metals. It has mostly been used for parts in the millimeter and centimeter range made of precious alloys. A newly developed plaster-bonded investment allows to manufacture small structures in the micrometer range made of base alloys such as Al bronze. Compared to phosphate-bonded investments, the plaster-bonded investment can be easily removed from cast parts with very complicated microstructures without damaging or influencing the chemically reactive metal. Additionally, it was found that the new plaster-bonded investment significantly improves the casting of the gold base alloy Stabilor® G, because the mold filling ability for structures in the submillimeter range was greatly facilitated at an even lower preheating temperature of the mold.

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Acknowledgements

Financial support by the Deutsche Forschungsgemeinschaft under the Sonderforschungsbereich (Collaborative Research Center) 499 in cooperation with the Technical University of Karlsruhe, Germany, is gratefully acknowledged. Additionally, we would like to thank Degussa Dental for providing the precious alloys.

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  1. Institute for Materials Research IMF-III, Forschungszentrum Karlsruhe, P.O. Box 36 40, 76021, Karlsruhe, Germany

    G. Baumeister, S. Rath & J. Hausselt

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  1. G. Baumeister
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  2. S. Rath
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  3. J. Hausselt
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Correspondence to G. Baumeister.

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Baumeister, G., Rath, S. & Hausselt, J. Microcasting of Al bronze and a gold base alloy improved by plaster-bonded investment. Microsyst Technol 12, 773–777 (2006). https://doi.org/10.1007/s00542-006-0105-3

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  • DOI: https://doi.org/10.1007/s00542-006-0105-3

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