Open AccessOxidation and Corrosion properties of a Novel Al15Ti30Si30Mo15Ni10 High Entropy Alloy fabricated by Spark Plasma Sintering Technology
Author(s) -
L.R. Kanyane,
A. P. I. Popoola,
N. Malatji,
A. Mthisi,
O. S. I. Fayomi
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1107/1/012233
Subject(s) - materials science , microstructure , diffractometer , spark plasma sintering , alloy , corrosion , scanning electron microscope , high entropy alloys , indentation hardness , metallurgy , composite material
The need for new advanced high temperature materials is in high demand. High Entropy Alloy (HEAs) has been described to possess excellent mechanical oxidation and good corrosion resistance properties even far above the ambient temperature. Attempts are made in this research to study the corrosion, oxidation, microhardness and densification properties of Al 15 Ti 30 Si 30 Mo 15 Ni 10 HEA produced by spark plasma sintering (SPS) for high temperature applications. In addition, the effects of SPS temperature (800, 900 and 1000°C) on the microstructure and phase formation of the developed HEA were reported. The microstructural modification and phases present were examined using the scanning electron microscope (SEM) equipped with the energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD) respectively. Ordered FCC and BCC systems were identified along with clearly defined crystal lattice along with Mo, Ti and Si rich regions were observed. No pores or cracks were observed from the microstructures. Densification of 98.8% accompanied with microhardness of 1445.29HV was achieved for both HEA at 1000°C. The Al 15 Ti 30 Si 30 Mo 15 Ni 10 HEA fabricated at 1000°C displayed a higher polarization value of 3477 Ω.