Electro-spark deposition of multi-element high entropy alloy coating

Q. H. Li, Tai Man Yue, Z. N. Guo

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

A multi-element high entropy alloy coating AlCoCrFeNi was fabricated on AISI 1045 carbon steel substrates using electro-spark deposition. The surface morphology of the as-deposited coating was examined and the phase of the coating was identified. In addition, the hardness and the corrosion properties of the coating were evaluated. An SEM examination showed that a metallurgically bonded coating of thickness up to 100μm can be produced on carbon steel substrates. The results of an EDX analysis suggest that the coating has the same chemical composition as the high entropy alloy without apparent dilution of content. The XRD results indicate that the coating has a simple BCC structure and no intermetallic phase was detected. The microhardness of the coating was some two times higher than that of the substrate material. With regard to corrosion properties, the corrosion current density and the corrosion potential of the as-deposited coating were three orders of magnitude lower and 140mV higher than those of the substrate material, respectively. Moreover, the polarization curve of the coating exhibits a passive region, indicating that the corrosion resistance of the coating is superior to that of the substrate material.
Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition 2010, MS and T'10
Pages1538-1547
Number of pages10
Volume3
Publication statusPublished - 1 Dec 2010
EventMaterials Science and Technology Conference and Exhibition 2010, MS and T'10 - Houston, TX, United States
Duration: 17 Oct 201021 Oct 2010

Conference

ConferenceMaterials Science and Technology Conference and Exhibition 2010, MS and T'10
CountryUnited States
CityHouston, TX
Period17/10/1021/10/10

Keywords

  • Corrosion
  • Dilution
  • Electro-spark deposition
  • Hardness
  • High entropy alloy

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

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