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<p>Nano-scale micro-zones of aluminum-oxygen (Al-O) enrichment have been observed using transmission electron microscope (TEM) at the interface between RE inclusions and steel matrix in Al-killed sulfur-containing steels, which is attributed to the adsorption of aluminum-oxygen (Al-O) to RE-inclusion surfaces based on the results of the density functional theory (DFT) calculations. The elemental enrichment micro-zone favors to the evolution of transient inclusions to Ce-Al-O or Al<sub>2</sub>O<sub>3</sub> since the thermodynamic stability of Ce-S and Ce-O-S inclusions has been decreased.</p>

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Effect of Aluminum-Oxygen (Al-O) Enrichment on Inclusion Evolution During Cerium Treatment

  • 期刊论文

  • 发表日期：

    2025年6月30日

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  • Tao Liu,
  • Hui Ma,
  • Yang Liu,
  • Pei Wang,
  • Dianzhong Li

摘要

Nano-scale micro-zones of aluminum-oxygen (Al-O) enrichment have been observed using transmission electron microscope (TEM) at the interface between RE inclusions and steel matrix in Al-killed sulfur-containing steels, which is attributed to the adsorption of aluminum-oxygen (Al-O) to RE-inclusion surfaces based on the results of the density functional theory (DFT) calculations. The elemental enrichment micro-zone favors to the evolution of transient inclusions to Ce-Al-O or Al2O3 since the thermodynamic stability of Ce-S and Ce-O-S inclusions has been decreased.