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Influence of Ultra-Sonic Drilling on Colloidal Silica Based Ceramic Moulds for Investment Casting

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Abstract

Investment casting (IC) ceramic shells are mostly impervious in nature which causes gas porosity defects in the castings. The present research work emphasizes on additional increase of ceramic shell’s porosity (23%) and permeability (7%) by drilling micro holes on it using ultra-sonic machining (USM) process. It was established that the casting porosity of Al-7wt.%Si alloy reduced by 17.3% and its tensile strength increased by 8.7% as compared to those obtained from conventional polymer modified ceramic shells (PMCS). A little damage to the inner primary layer of the brittle ceramic shell was observed that occurred due to micro-drilling process, which later produced spikes on casting. However, these spikes were easily removed from the cast parts by minor finishing operation.

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Acknowledgments

The authors would like to thank Dr. Kishore Debnath for his help in USM.

Funding

Authors are thankful to Bee Chems India Pvt. Ltd., Kanpur for supplying the slurry materials for constructing the ceramic shells.

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Authors and Affiliations

  1. Department of Mechanical Engineering, VSSUT Burla, Burla, Odisha, India

    Sarojrani Pattnaik & Mihir Kumar Sutar

Authors
  1. Sarojrani Pattnaik
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  2. Mihir Kumar Sutar
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Contributions

The corresponding author has conducted the experimentation and the second author has done all editing of text and figures, and critically revised the manuscript before submission.

Corresponding author

Correspondence to Sarojrani Pattnaik.

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Pattnaik, S., Sutar, M.K. Influence of Ultra-Sonic Drilling on Colloidal Silica Based Ceramic Moulds for Investment Casting. Silicon 14, 3981–3992 (2022). https://doi.org/10.1007/s12633-021-01166-5

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  • DOI: https://doi.org/10.1007/s12633-021-01166-5

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