Cracking resistance of Cr3C2–NiCr and WC–Cr3C2–Ni thermally sprayed coatings under tensile bending stress
Research output: Contribution to journal › Article › Scientific › peer-review
Details
| Original language | English |
|---|---|
| Pages (from-to) | 169-175 |
| Number of pages | 7 |
| Journal | Surface and Coatings Technology |
| Volume | 281 |
| DOIs | |
| Publication status | Published - 15 Nov 2015 |
| Publication type | A1 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