Particle coagulation in molten metal based on three-dimensional analysis of cluster by X-ray micro-computer tomography (CT)

Tao Li, Shin Ichi Shimasaki, Shoji Taniguchi, Kentaro Uesugi, Shunsuke Narita

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Particle coagulation plays a key role in steel refining process to remove inclusions. Many research works focus on the behaviors of particle coagulation. To reveal its mechanism water model experiments have been performed by some researchers including the authors' group. In this paper, experiments of particle coagulation were carried out with molten Al including SiC particles in a mechanically agitated crucible with two baffles. Particle coagulation and formation of clusters were observed on the microscopy images of as-polished samples. Three-dimensional (3D) analysis of the clusters in solidified Al was implemented by X-ray micro CT available at SPring-8. The methods to distinguish clusters on two-dimensional (2D) cross-sectional images were discussed, which were established in the previous works by the present authors' group. The characteristics of the 3D SiC clusters and their 2D cross-sections were analyzed. The statistical ranges of the parameters for 2D clusters were used as criterions to distinguish the clusters on 2D microscopy images from the as-polished samples. The kinetics of SiC particle coagulation was studied by the measured cluster number density and size using our program to distinguish cluster in 2D crosssectional images according to 3D information (DC-2D-3D). The calculated and experimental results of the SiC particle coagulation in molten Al agree well with each other.

Original languageEnglish
Pages (from-to)1958-1967
Number of pages10
JournalIsij International
Issue number11
Publication statusPublished - 2013
Externally publishedYes


  • Molten metal
  • Particle coagulation
  • Three-dimensional cluster
  • X-ray micro-CT

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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