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Laser cladding for wear-resistant Cr-alloyed Ni2Si-NiSi intermetallic composite coatings

  • Beihang University

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

A wear-resistant Cr-alloyed Ni-Si silicides intermetallic coating was fabricated on substrate of 0.20% C carbon steel by laser cladding with Ni-22.6%Si-5.6%Cr (wt.%) elemental powders. Wear resistance of the intermetallic composite coating was evaluated under dry sliding wear test conditions. The laser clad chromium-alloyed nickel silicide coating has a rapidly solidified microstructure consisting of the Ni2Si primary cellular-dendrites and minor amount of interdendritic Ni2Si/NiSi eutectics. The intermetallic coating has good wear resistance under dry sliding wear test conditions due to the high hardness, refined microstructure and strong intermetallic atomic bonds.

Original languageEnglish
Pages (from-to)2914-2918
Number of pages5
JournalMaterials Letters
Volume57
Issue number19
DOIs
StatePublished - Jun 2003
Externally publishedYes

Keywords

  • Coatings
  • Laser cladding
  • Microstructure
  • Nickel silicides
  • Wear resistance

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