Título

Thermal spray deposition, phase stability and mechanical properties of La2Zr2O7/LaAlO3 coatings

Autor

DAVID LOZANO MANDUJANO

HAIDEÉ RUIZ LUNA

BERTHA MARIA ESPARZA ESPARZA

ASTRID LORENA GIRALDO BETANCUR

JUAN MANUEL ALVARADO OROZCO

LUIS GERARDO TRAPAGA MARTINEZ

Juan Muñoz Saldaña

Carlos Agustín Poblano Salas

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-sa/4.0

Referencia de publicación

URL/https://link.springer.com/article/10.1007/s11666-017-0569-y

ISSN/1544-1016

Referencia de datos

datasetDOI/10.1007/s11666-017-0569-y

Materias

Mechanical properties - (PALABRA CLAVE DEL AUTOR) Pyrochlores - (PALABRA CLAVE DEL AUTOR) TBC - (PALABRA CLAVE DEL AUTOR) Thermal spray - (PALABRA CLAVE DEL AUTOR) INGENIERÍA Y TECNOLOGÍA - (CTI) CIENCIAS TECNOLÓGICAS - (CTI) TECNOLOGÍA DE MATERIALES - (CTI) OTRAS - (CTI) OTRAS - (CTI)

Resumen o descripción

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.

Editor

Springer International Publishing

Fecha de publicación

5 de junio de 2017

Tipo de publicación

Artículo

Versión de la publicación

Borrador

Recurso de información

http://ciateq.repositorioinstitucional.mx/jspui/handle/1020/115

Formato

application/pdf

Idioma

Inglés

Audiencia

Público en general

Sugerencia de citación

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

Repositorio Orígen

CIATEQ Digital

Descargas

296