Estimation of the infiltration potential of cu-alloy for core bits

Ki Ho Kim, Wooyoung Yoon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


To estimate the infiltration potential in metal binders, a new parameter, the EII (Effective Infiltration Index), which can be determined with the surface tension and viscosity data of each liquid metal used in the binder, is introduced. The parameter was found to be closely related to the measured infiltration distance. As an infiltrant for core bits, the Cu-Sn alloy with a higher EII value was selected and compared with the conventional Cu-Zn alloy. For the formation of harder rock, a finer W size in the matrix is generally used to maintain the cutting rate. However, in such a case, the infiltration potential becomes lower and a fully infiltrated microstructure cannot be obtained. In this study, the matrix with the Cu-Sn alloy showed an evenly infiltrated and sound microstructure up to a W size of 1m and had a longer tool life than the conventional Cu-Zn alloy in a simulated drilling test.

Original languageEnglish
Pages (from-to)138-144
Number of pages7
JournalJournal of Korean Institute of Metals and Materials
Issue number2
Publication statusPublished - 2016 Feb 1


  • Composites
  • Hardness test
  • Infiltration
  • Thermodynamic properties

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Modelling and Simulation


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