Phase stability and microstructural properties of high entropy alloy reinforced aluminium matrix composites consolidated via spark plasma sintering

Smith Salifu, Peter Apata Olubambi, Linda Teffo

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Spark plasma sintering (SPS) technique was employed in the consolidation of Cr20Mn20Ni20Cu20Nb10Co10 high entropy alloy (HEA) reinforced aluminium matrix composites. Phase stability and prediction expressions were used in the determination of the powder combination for the HEA. The microstructural analysis showed that an interdiffusion layer was formed between the aluminium matrix and the HEA particles in the sintered composites. Further investigation of the composites by X-ray diffraction (XRD) showed that in addition to the Al matrix phase present, other new phases (BCC, FCC and other intermetallics) were formed as a result of the reaction between the Al matrix and the atoms precipitated from the added HEA during sintering. The density of the HEA-reinforced Al matrix composites decreases with an increase in the wt.% of HEA from 98.6 % for pure aluminium to 98.1 % for the reinforced alloy with 10 % HEA, while the microhardness increases with an increase in the wt.% of the HEA from 35 HV for pure aluminium to 96.0 HV for the alloy reinforced with 10 % HEA.

Original languageEnglish
Article numbere24498
JournalHeliyon
Volume10
Issue number2
DOIs
Publication statusPublished - 30 Jan 2024

Keywords

  • High entropy alloy
  • Microhardness
  • Phase stability
  • Reinforcement
  • Spark plasma sintering

ASJC Scopus subject areas

  • Multidisciplinary

Fingerprint

Dive into the research topics of 'Phase stability and microstructural properties of high entropy alloy reinforced aluminium matrix composites consolidated via spark plasma sintering'. Together they form a unique fingerprint.

Cite this