| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7994738 | Journal of Alloys and Compounds | 2018 | 8 Pages |
Abstract
In this study, titanium was introduced to a Cu-Si alloy as an impurity getter to redistribute boron. A small amount of Ti was melted with Cu-Si alloy, followed by cooling of the alloy to precipitate purified Si crystals which were later separated through multi-step leaching. The effects of Ti content on the distribution of various elements in different phases and microstructure of the solidified alloy were investigated. It was found that Ti in Cu-Si alloy facilitates boron removal by several mechanisms including formation of TiB2 and decreasing the segregation coefficient of B between Si and Cu-Si. Addition of Ti to a Cu-50Â wt%Si alloy, compared to silicon metal, showed a significant increase in B removal. An increase in Ti in the range of 1-5% increased B removal, reaching â¼85% at 5% Ti addition. Ti in excess of that required to form TiB2 reacts with Si to generate TiSi2, which collects impurities such as P and Al.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Liuqing Huang, Juan Chen, Abdolkarim Danaei, Sridevi Thomas, Liuying Huang, Xuetao Luo, Mansoor Barati,