YAG thermal barrier coatings deposited by suspension and solution precursor thermal spray
| dc.contributor.author | T.A. Owoseni T. Hussain a a , * a , A. Rincon Romero a , Z. Pala b , F. Venturi E.H. Lester a , D.M. Grant a ,T. Hussain a a , | |
| dc.date.accessioned | 2025-02-08T16:05:15Z | |
| dc.date.available | 2025-02-08T16:05:15Z | |
| dc.date.issued | 2021-05-13 | |
| dc.description.abstract | Yttrium aluminium garnet (YAG) is a promising topcoat material for thermal barrier coatings due to its high temperature stability and better CMAS (calcium-magnesium-alumino-silicate) resistance. YAG topcoats were deposited by suspension and solution precursor high-velocity oxy-fuel (HVOF) thermal spray. The relationships between processing, microstructure and final properties were studied through a range of characterization techniques and thermal cycling tests. The microstructure of the as-sprayed YAG topcoat from stoichiometric solution precursor (SP-YAG) had distributed pores and inter-splat boundaries, while the as-sprayed topcoat produced from suspension (S-YAG) had vertical and branched micro cracks, pores, and inter-splat boundaries. Both as-sprayed coatings were composed of amorphous phase, hexagonal yttrium aluminium perovskite (YAP) and cubic YAG. In thermal cycling tests, 20% of SP-YAG failure was reached after the 10th cycle; whereas, S-YAG reached the failure criteria between the 60th and 70th cycle. The failure of both the SP-YAG and the S-YAG topcoats occurred due to thermal stresses during the thermal cycling. | |
| dc.identifier.uri | https://doi.org/10.1016/j.ceramint.2021.05.087 | |
| dc.identifier.uri | https://kwasuspace.kwasu.edu.ng/handle/123456789/4091 | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.relation.ispartofseries | Vol. 47 | |
| dc.title | YAG thermal barrier coatings deposited by suspension and solution precursor thermal spray | |
| dc.title.alternative | None |