Please use this identifier to cite or link to this item: http://ciateq.repositorioinstitucional.mx/jspui/handle/1020/115
Thermal spray deposition, phase stability and mechanical properties of La2Zr2O7/LaAlO3 coatings
DAVID LOZANO MANDUJANO
CARLOS AGUSTIN POBLANO SALAS
HAIDEÉ RUIZ LUNA
BERTHA MARIA ESPARZA ESPARZA
ASTRID LORENA GIRALDO BETANCUR
JUAN MANUEL ALVARADO OROZCO
LUIS GERARDO TRAPAGA MARTINEZ
Juan Muñoz Saldaña
En Embargo
05-06-2018
Atribución-NoComercial-CompartirIgual
https://link.springer.com/article/10.1007/s11666-017-0569-y
1544-1016
10.1007/s11666-017-0569-y
Mechanical properties
Pyrochlores
TBC
Thermal spray
This paper deals with the deposition of La2Zr2O7 (LZO) and LaAlO3 (LAO) mixtures by air plasma spray (APS). The raw material for thermal spray, single phase LZO and LAO in a 70:30 mol.% ratio mixture was prepared from commercial metallic oxides by high-energy ball milling (HEBM) and high-temperature solid-state reaction. The HEBM synthesis route, followed by a spray-drying process, successfully produced spherical agglomerates with adequate size distribution and powder-flow properties for feeding an APS system. The as-sprayed coating consisted mainly of a crystalline LZO matrix and partially crystalline LAO, which resulted from the high cooling rate experienced by the molten particles as they impact the substrate. The coatings were annealed at 1100 °C to promote recrystallization of the LAO phase. The reduced elastic modulus and hardness, measured by nanoindentation, increased from 124.1 to 174.7 GPa and from 11.3 to 14.4 GPa, respectively, after the annealing treatment. These values are higher than those reported for YSZ coatings; however, the fracture toughness (KIC) of the annealed coating was only 1.04 MPa m0.5.
Funding from CONACYT – CIMAV – Southern Office of Aerospace Research and Development (SOARD) for the project ‘‘Multiphase-Multifunctional Ceramic Coatings’’ is acknowledged. Research made use of the MRL Shared Experimental Facilities, supported by the MRSEC Program of the NSF under Award No. DMR 1121053; a member of the NSF-funded Materials Research Facilities Network. JMS recognizes partial support of the Av Humboldt foundation for the HERMES fellowship. This research has been carried out partially at CENAPROT and LIDTRA national laboratories.
Springer International Publishing
05-06-2017
Artículo
Inglés
Público en general
Lozano-Mandujano, D., Poblano-Salas, C.A., Ruiz-Luna, H. et al. J Therm Spray Tech (2017) 26: 1198. https://doi.org/10.1007/s11666-017-0569-y
OTRAS
Borrador
draft - Borrador
Appears in Collections:Artículos Publicados en Revistas Indexadas