Surface Roughness of Cast Aluminium Alloy by Evaporative Pattern Casting (EPC) Process using Powered Silica-Kaolin Mix as Pattern Coating

  • B.V. Omidiji Department of Mechanical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria.
  • R.H. Khan Department of Mechanical Engineering, Federal University of Technology, Minna, Nigeria.
  • M.S. Abolarin Department of Mechanical Engineering,Federal University of Technology, Minna, Nigeria.
  • N.A. Ademoh Department of Mechanical Engineering,Federal University of Technology, Minna, Nigeria.
Keywords: Pattern coating, Evaporative patterns, Surface roughness, Carrier, Binder and pouring temperature

Abstract

The influence of the refractory coating which is a mixture of silica flour and kaolin on the surface roughness of the plate castings produced using evaporative patterns had been considered in this work. The kaolin was used as a binder and ratio method was employed to form basis for the factorial design of experiment which led to nine runs of experiments. Methyl alcohol at 99% concentration was used as the carrier for the transfer of the coating to the surface of the patterns. Pouring temperature was observed as a process parameter alongside the mix ratios of the coating. Attempts were made to characterize the refractory coating by using two methods; differential thermal analysis (DTA) and X-ray diffraction. It was observed that the mix ratio 90% silica flour-10% kaolin produced the lowest value of the surface roughness of the plate castings and had the lowest material loss in the DTA test. The pouring temperature of 6500C produced best casting.

Author Biographies

B.V. Omidiji, Department of Mechanical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria.

Department of Mechanical Engineering, 
Obafemi Awolowo University,
Ile-Ife, Nigeria.

R.H. Khan, Department of Mechanical Engineering, Federal University of Technology, Minna, Nigeria.

Department of Mechanical Engineering,
Federal University of Technology,
Minna, Nigeria.

M.S. Abolarin, Department of Mechanical Engineering,Federal University of Technology, Minna, Nigeria.

Department of Mechanical Engineering,
Federal University of Technology,
Minna, Nigeria.

N.A. Ademoh, Department of Mechanical Engineering,Federal University of Technology, Minna, Nigeria.

Department of Mechanical Engineering,
Federal University of Technology,
Minna, Nigeria.

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Published
2016-05-01
How to Cite
Omidiji, B., Khan, R., Abolarin, M., & Ademoh, N. (2016). Surface Roughness of Cast Aluminium Alloy by Evaporative Pattern Casting (EPC) Process using Powered Silica-Kaolin Mix as Pattern Coating. Ife Journal of Technology, 24(1), 26-31. Retrieved from http://ijt.oauife.edu.ng/index.php/ijt/article/view/20