Modification of Ceramic Mold for Investment Casting with Silica Sand as Stucco and Nylon Addition

Abstract:

The investment casting process has increasingly been used to produce components because it has the advantage to produce high precision part. One of the obstacles in the investment casting process in Indonesia is imported ceramic mold material. However, Indonesia has the potential silica sand which can be developed as an alternative material mullite . This study aims to develop local silica sand as stucco with the addition of nylon fibers in the slurry. Characterization of the ceramic material is bending test, edge test, and porosity tests that will be compared with the ceramic mold mullite-based. Characterization also conducted on casting product of aluminum impeller turbine by hardness test, microstructure examination by optical microscopy and SEM . The results showed that strength of ceramic molds made ​​from silica sand increase due to the addition of nylon but has not reached a standard ceramic strength. Ceramic mold is able to withstand the load at the time of pouring. There is not misrun in the casting product but some porosity due to low permeability.

• Periodical: Advanced Materials Research (Volume 1112)
• Pages: 510-514
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1112.510
• Online since: July 2015
• Authors: Bondan Tiara Sofyan, M. Syahid, Hafid. A. Khairuddin, R. Nurdin
• Keywords: Aluminium Alloy, Ceramic Mold, Investment Casting, Turbine Impeller

References

[1] S. Jones and C. Yuan, Advances in shell moulding for investment casting, J. Mat. Proc. Tech. 135 (2003) 258–265.

[2] C. Yuan, S. Jones, S. Blackburn., The influence of autoclave steam on polymer and organic fibre modified ceramic shells, J. Eur. Ceram. Soc. 25 (2005) 1081–1087.

DOI: 10.1016/j.jeurceramsoc.2004.04.011

[3] M.T. Jovanovic, B. Dimcic, I. Bobic, S. Zec, and V. Maksimovic, Microstructure and mechanical properties of precision cast TiAl turbocharger, J. Mat. Proc. Tech. 167 (2005) 14-21.

[4] D.R. Gunasegaram, D.J. Farnsworth, and T.T. Nguyen, Identification of critical factors affecting shrinkage porosity in permanent mold casting using numerical simulations based on design of experiments, J. Mat. Proc. Tech. 209 1209-1219.

DOI: 10.1016/j.jmatprotec.2008.03.044

[5] H. Saridikmen, N. Kuskonmaz, Properties of ceramic casting molds produced with two different binders, Ceram. Inter. 31 (2005) 873–878.

DOI: 10.1016/j.ceramint.2004.10.004

[6] D.Z. Lia, J. Campbell, and Y.Y. Li, Filling system for investment cast Ni-base turbine blades, J. Mat. Proc. Tech. 148 (2004) 310–316.

DOI: 10.1016/j.jmatprotec.2004.02.032