Abstract
In this paper, the microstructure, microhardness and adhesive strength of Al-12Si coating produced by cold spraying were investigated. It is found that a thick, dense and well bonded Al-12Si coating could be produced by cold spraying with a relatively large powder through the control of spray conditions. The critical velocity for large Al-12Si particles was lower than that of small Al-12Si particles. The as-deposited Al-12Si coating had the same crystal structure as Al-12Si powder. The localized interface melting occurred resulting from both the adiabatic shearing upon impact and the thermal effect of hot gas. Some fine Si particles precipitated in α-Al matrix because of the thermal effect of hot gas during coating deposition. The dispersed Si particles in Al-12Si coating improved the coating microhardness.
| Original language | English |
|---|---|
| Pages (from-to) | 7124-7130 |
| Number of pages | 7 |
| Journal | Applied Surface Science |
| Volume | 253 |
| Issue number | 17 |
| DOIs | |
| State | Published - 30 Jun 2007 |
| Externally published | Yes |
Keywords
- Adhesive strength
- Al-12Si alloy coating
- Cold spraying
- Microhardness
- Microstructrure
Fingerprint
Dive into the research topics of 'Deposition characteristics of Al-12Si alloy coating fabricated by cold spraying with relatively large powder particles'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver