On the nano-treating effect of Al2O3 on the eutectic Si in Al-Si alloy

Mengyu Li; Tong Gao; Chunxiao Li; Yue Sun; Yuying Wu; Xiangfa Liu

doi:10.1016/j.micron.2023.103443

On the nano-treating effect of Al₂O₃ on the eutectic Si in Al-Si alloy

Micron. 2023 May:168:103443. doi: 10.1016/j.micron.2023.103443. Epub 2023 Mar 7.

Authors

Mengyu Li¹, Tong Gao², Chunxiao Li¹, Yue Sun¹, Yuying Wu¹, Xiangfa Liu¹

Affiliations

¹ Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan 250061, PR China.
² Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, 17923 Jingshi Road, Jinan 250061, PR China. Electronic address: tgao@sdu.edu.cn.

PMID: 36905753
DOI: 10.1016/j.micron.2023.103443

Abstract

An Al-15 Al₂O₃ alloy was added into Al-12Si melt to investigate the nano-treating effect of Al₂O₃ nanoparticles on eutectic Si crystals. It was found that Al₂O₃ clusters may be partly swallowed by eutectic Si or distribute surrounding them. As a result, the flake-like eutectic Si in Al-12Si alloy can transform to granular or worm-like morphologies, attributing to the influence of Al₂O₃ nanoparticles on the growth behavior of eutectic Si crystals. The orientation relationship between Si and Al₂O₃ was identified, and the possible modifying mechanisms were discussed.

Keywords: Al(2)O(3) nanoparticles; Eutectic Si; Growth mechanism; Nano–treating.