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

Technical paper

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.

Keywords

Mold Contact Angle Investment Casting Tensile Test Specimen Mold Filling 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

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.

References

  1. al-Mesmar HS, Morgano SM, Mark LE (1999) Investigations of the effect of three sprue designs on the porosity and the completeness of titanium cast removable partial denture frameworks. J Prosthet Dent 82(1):15–21CrossRefPubMedGoogle Scholar
  2. Bach Fr-W, Moehwald K, Hollaender U, Nakhosteen B (2001) Entwicklung einer neuen Metallgießtechnik für die Mikromechanik. Z Metallkd 92(3):207–211Google Scholar
  3. Battaini P (2004) Investment casting for oral cavity applications: peculiarities and problems. La Metallurgia Italiana 10:57–69Google Scholar
  4. Baumeister G, Ruprecht R, Hausselt J (2004) Replication of LIGA structures using microcasting. Microsyst Technol 10(6–7):484–488CrossRefGoogle Scholar
  5. Brockhurst PJ, McLaverty VG (1983) Chemical analysis, castability and tensile properties of twenty-one dental base metal casting alloys for removable dental appliances. Aust Dent J 28(6):370–377PubMedCrossRefGoogle Scholar
  6. Coghill TL (1983) Investment casting offers economy for many applications. Precis Met 41(3):23–26Google Scholar
  7. DIN EN (1982) Issue 1998-12, Beuth-Verlag, BerlinGoogle Scholar
  8. Hunt LB (1980) The long history of lost wax casting, Gold bulletin no. 13, pp 63–79Google Scholar
  9. Jones S, Yuan C (2003) Advances in shell moulding for investment casting. J Materials Processing Technol 135(2–3):258–265CrossRefGoogle Scholar
  10. Kempf B (1996) Dentalwerkstoffe in: Enzyklopädie Naturwissenschaft und Technik, 2. Auflage, ecomed, LandsbergGoogle Scholar
  11. Kempf B, Hausselt J (1992) Gold, its alloys and their uses in dentistry. Interdisciplinary Sci Rev 17(3):251–260Google Scholar
  12. McCloskey JC (1987) The application of commercial investment casting principles to jewelry casting. In: The Santa Fe symposium on jewelry manufacturing technology, Santa Fe, New Mexico, USA, 17–19 September 1987, (1988), pp 203–222Google Scholar
  13. McCloskey JC, Aithal S, Welch PR (2001) Silicon microsegregation in 14K yellow gold jewelry alloys. Gold Bull 34(1):3–13Google Scholar
  14. McKeown J (1997) Investment casting: a manufacturing alternative. Metal Casting Finishing (Aust) 43(1–2):42–45Google Scholar
  15. Moehwald K, Morsbach C, Bach Fr-W, Gatzen H-H (1999) In: Investigations on capillary action microcasting of metals, 1st international conference and general meeting of the European society for precision engineering and nanotechnology, vol 1. Shaker Verlag, Bremen, pp 490–493Google Scholar
  16. Ott D (1988) Methods for investment casting in the jewelry industry: principles, advantages, disadvantages. In: The Santa Fe symposium on jewelry manufacturing technology 1988, Santa Fe, 21–24 September 1988, (1989), pp 203–216Google Scholar
  17. Power DC (1995) Palladium alloy pinning wires for gas turbine blade investment casting. Platinum Metals Rev (UK) 39(3):117–126MathSciNetGoogle Scholar
  18. Rashid A, Campbell J (2004) Oxide defects in a vacuum investment-cast Ni-based turbine blade. Metall Materials Trans A 35(7):2063–2071CrossRefGoogle Scholar
  19. Raub Ch (1981) The lost wax procedure for casting jewellery—part I. Metallurgia 35(12):1257–1259Google Scholar
  20. Sangle VS (2001) Investment casting, Institute of Indian Foundrymen. Indian Foundry J (India) 47(8):23–28Google Scholar
  21. Smart RF (1985) Fifty years of investment casting. Metallurgia 52(11):458–459Google Scholar
  22. Smart RF (1993) Investment casting. Cookson Tech Bull Fourth Q 4(4):3–5Google Scholar
  23. Valerio F (2003) Handbook of investment casting. World gold council, LondonGoogle Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Institute for Materials Research IMF-IIIForschungszentrum KarlsruheKarlsruheGermany

Personalised recommendations