| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5362937 | Applied Surface Science | 2011 | 6 Pages |
Dry-ice blasting, as an environmental-friendly method, was introduced into atmospheric plasma spraying for improving properties of metallic, alloy and ceramic coatings. The deposited coatings were then compared with coatings plasma-sprayed using conventional air cooling in terms of microstructure, temperature, oxidation, porosity, residual stress and adhesion. It was found that a denser steel or CoNiCrAlY alloy coating with a lower content of oxide can be achieved with the application of dry-ice blasting during the plasma spraying. In addition, the adhesive strength of Al2O3 coating deposited with dry-ice blasting exceeded 60Â MPa, which was nearly increased by 30% compared with that of the coating deposited with conventional air cooling. The improvement in properties of plasma-sprayed metallic, alloy and ceramic coatings caused by dry-ice blasting was attributed to the decrease of annulus-ringed disk like splats, the better cooling efficiency of dry-ice pellets and even the mechanical effect of dry-ice impact.
⺠Dry-ice blasting was introduced into atmospheric plasma spraying for improving properties of coatings. ⺠A denser steel or CoNiCrAlY alloy coating with a lower content of oxide was achieved with the dry-ice blasting. ⺠The adhesive strength of Al2O3 coating plasma-sprayed with dry-ice blasting was nearly increased by 30%. ⺠Dry-ice blasting was found to potentially clean organic substances adsorbed on the substrates besides a cooling effect during APS.
