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Cracking resistance of Cr3C2–NiCr and WC–Cr3C2–Ni thermally sprayed coatings under tensile bending stress

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)169-175
Number of pages7
JournalSurface and Coatings Technology
Volume281
DOIs
Publication statusPublished - 15 Nov 2015
Publication typeA1 Journal article-refereed

Abstract

The cracking behaviour of Cr3C2–25(Ni20Cr) and WC–20Cr3C2–7Ni thermally sprayed coatings during tensile load in 3-point bending tests was studied by Acoustic Emission (AE) monitoring and microstructure post-analysis. The AE monitoring reveals a superior resistance against cracking in the WC–Cr3C2–Ni coatings compared to Cr3C2–NiCr. The incorporation of tungsten carbides beneficially affects the residual stress state of the coatings and has an impact on the detailed fracture mode. The results hold for both as-sprayed as well as ground and polished coatings.

Keywords

  • Acoustic emission, HVOF thermal spray coating, Cr3C2, WC, Bending test, Cracking

Publication forum classification

Field of science, Statistics Finland