Novel CuxFeMnNiSnTi high entropy alloys: Microstructure, surface chemistry, and corrosion resistance

Author(s)

da Silva, Leandro Santos ; Ferreira, Tiago Luiz ; Lopes de Oliveira, Mara Cristina ; Antunes, Renato Altobelli ; Galdino da Silva, Ricardo Alexandre

• Document type: Journal article
• Source: JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T; v. 26, p. 16-pg., 2023-09-06.

Abstract

CuxFeMnNiSnTi alloys were prepared by electric arc melting. The microstructure was examined by scanning electron microscopy and the crystalline phases were assessed by X-ray diffractometry. The composition of the surface oxide film was analyzed by X-ray photoelectron spectroscopy. The corrosion resistance was studied by electrochemical impedance spectroscopy and potentiodynamic polarization. Depending on the copper content, the microstructures were comprised of (Cu,Mn,Ni)3Sn, Ti(Ni,Fe)2Sn, and (Fe,Mn)2Ti. The oxide films consisted of a complex mixture of different oxide phases. The corrosion resistance was affected by the copper content and was mainly influenced by the alloy microstructure than the composition of the oxide film.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). (AU)

• FAPESP's process: 18/26267-7 - Study of FeNiCuMnTiSn-based high entropy alloys applied in thermomagnetic motors
• Grantee: Leandro Santos da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 22/04262-9 - Development and physical chemical characterization of multicomponent alloys
• Grantee: Ricardo Alexandre Galdino da Silva
• Support Opportunities: Regular Research Grants