Effects of solid lubricants on properties of Al-Si-SiC composite powder produced by gas atomization technique

Authors

  • H Rudianto Gunadarma University
  • S S Yang Korea Institute of Materials Science
  • Y J Kim Korea Institute of Materials Science
  • I Dlouhy Brno University of Technology
  • W Caesarendra Diponegoro University

Abstract

Al-Si-SiC composites powder was analyzed in this research. The powder was made by gas atomizing process. Powder characterization was done to observe its morphology, particle size distribution and thermal properties. Effects of lubricants were intensively investigated in this research with compositions and pressure variables. It is assumed that higher amount of solid lubricant put into the powder, the lower ejection force needed to take out compacted powder. Finding appropriate solid lubricant is necessary to improve green and sintering properties. EBS (ethylene bis stearamide), aluminum stearate, zinc stearate and paraffin wax were used for investigation. Sintering under ultra high purity nitrogen gas 99.9999% was carried out to produce high density material. SEM-EDS and XRD were carried to characterize this powder. SiC particles in this powder prohibit to achieve optimum sintering properties of Al-Si-SiC due to their resistance during compaction which leads to form pores and lower sintering density. And ethylene bis stearamide (EBS) seems to be suitable solid lubricant for this powder by giving lower ejection force, flowability and higher sintering density for 93.5%.

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Author Biography

H Rudianto, Gunadarma University

Haris Rudianto is a lecturer and the head of Advanced Materials Laboratory at the Department of Mechanical Engineering, Gunadarma University in Indonesia. He was born in Kuningan in 1983 and He finished his school up to high school in Kuningan. He finished his bachelor in 2007 at the Department of Mechanical Engineering, Diponegoro University in Semarang, Indonesia with major on materials engineering. From 2008-2012, He finished his master and PhD degrees at Pukyong National University and continue to work at Korea Institute of Materials Science. From 2013 to 2016, he worked as a postdoctoral researcher under EU projects in Czech Republic at Brno University of Technology. During this period, he had collaborated with several institutions in Austria and Germany. His research interests are mostly on lightweight materials, powder metallurgy, aluminum alloys, nanomaterials and computational materials.

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Published

2020-09-29

How to Cite

[1]
H. Rudianto, S. S. Yang, Y. J. Kim, I. Dlouhy, and W. Caesarendra, “Effects of solid lubricants on properties of Al-Si-SiC composite powder produced by gas atomization technique”, J. Met. Mater. Miner., vol. 30, no. 3, Sep. 2020.

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Original Research Articles

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