Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Improving the Mechanical Properties of Salt Core through Reinforcing Fibers

  • Ahrom Ryu (Electronic Materials Research Center, Korea Institute of Science and Technology) ;
  • Soyeon Yoo (Electronic Materials Research Center, Korea Institute of Science and Technology) ;
  • Min-Seok Jeon (Materials Technology Center, Korea Testing Laboratory) ;
  • Dongkyun Kim (Castman Co) ;
  • Kiwon Hong (Castman Co) ;
  • Sahn Nahm (Department of Material Science and Engineering, Korea University) ;
  • Ji-Won Choi (Electronic Materials Research Center, Korea Institute of Science and Technology)
  • Received : 2023.05.15
  • Accepted : 2023.05.26
  • Published : 2023.05.31
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Abstract

Salt cores have attracted considerable attention for their application to the casting process of electric vehicle parts as a solution to ecological issues. However, the salt core still has low mechanical strength for use in high-pressure die casting. In this study, we investigated the improvements in the bending strength of KCl-based salt cores resulting from the use of reinforcing materials. KCl and Na2CO3 powders were used as matrix materials, and glass fiber and carbon fiber were used as reinforcing materials. The effects of carbon fiber and glass fiber contents on the bending strength properties were investigated. Here, we obtained a new fiber-reinforced salt core composition with improved bending strength for high-pressure die casting by adding a relatively small amount of glass fiber (0.3 wt%). The reinforced salt core indicates the improved properties, including a bending strength of 49.3 Mpa, linear shrinkage of 1.5%, water solubility rate of 16.25 g/min·m2 in distilled water, and hygroscopic rate of 0.058%.

Keywords

Acknowledgement

This research was supported by the Promising Green New Deal Company 100 R&D Program (2MRC190) funded by the Ministry of SMEs and Startups(MSS, Korea)

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