Ti-Enriched Al 2O 3/Cu Interfaces in a Cu-Al 2O 3 Alloy

15 Pages Posted: 18 Sep 2019

See all articles by Dengshan Zhou

Dengshan Zhou

Northeastern University - School of Materials Science and Engineering; Kyoto University - Department of Materials Science and Engineering; Kyoto University - Center for Elements Strategy Initiative for Structural Materials (ESISM)

Shenbao Jin

Nanjing University of Science and Technology - School of Material Science and Engineering

Chao Yang

Shanghai Jiao Tong University (SJTU) - School of Materials Science and Engineering

Kodai Niitsu

Kyoto University - Department of Materials Science and Engineering

Gang Sha

Nanjing University of Science and Technology - School of Material Science and Engineering

Deliang Zhang

Northeastern University - School of Materials Science and Engineering

Abstract

In this study, addition of minor Ti into a mechanically alloyed Cu-Al2O3 alloy powder was found to improve the dispersion of Al2O3 nanoparticles and influence the Cu matrix microstructural features after extrusion. Atom probe tomography (APT) analysis identified that the Ti dopant preferentially segregated at the Al2O3/Cu interfaces and weakly partitioned into Al2O3 nanoparticles. This segregation and partitioning inhibit coarsening of Al2O3 nanoparticles and stimulate the dynamic recrystallization of the Cu matrix during extrusion.

Keywords: ODS Cu, Minor alloying, Interfacial reaction, Solute Partitioning, APT

Suggested Citation

Zhou, Dengshan and Jin, Shenbao and Yang, Chao and Niitsu, Kodai and Sha, Gang and Zhang, Deliang, Ti-Enriched Al 2O 3/Cu Interfaces in a Cu-Al 2O 3 Alloy. Available at SSRN: https://ssrn.com/abstract=3454925 or http://dx.doi.org/10.2139/ssrn.3454925

Dengshan Zhou (Contact Author)

Northeastern University - School of Materials Science and Engineering ( email )

China

Kyoto University - Department of Materials Science and Engineering ( email )

Japan

Kyoto University - Center for Elements Strategy Initiative for Structural Materials (ESISM) ( email )

Kyoto
Japan

Shenbao Jin

Nanjing University of Science and Technology - School of Material Science and Engineering

No.219, Ningliu Road
Nanjing, Jiangsu
China

Chao Yang

Shanghai Jiao Tong University (SJTU) - School of Materials Science and Engineering ( email )

Shanghai, 200240
China

Kodai Niitsu

Kyoto University - Department of Materials Science and Engineering

Japan

Gang Sha

Nanjing University of Science and Technology - School of Material Science and Engineering

No.219, Ningliu Road
Nanjing, Jiangsu
China

Deliang Zhang

Northeastern University - School of Materials Science and Engineering ( email )

China

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