Microstructure and Thermal Characterization of Plasma-Sprayed Nanostructured La2Ce2O7-Doped YSZ Coatings
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- Authors:
- MANTRY, S
MANDAL, A
MISHRA, D. K
JHA, B. B
MISHRA, B. K
CHAKRABORTY, M - Author Affiliations:
- CSIR-Institute of Minerals & Materials Technology Bhubaneswar, Odisha 751013, India
School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, Bhubaneswar 751007, Odisha, India
Department of Physics, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar 751030, Odisha, India - Source:
- Development and Applications of Nanocomposite CoatingsJournal of thermal spray technology. 23(7):1073-1080
- Publication Date:
- 2014-01-01
- Language:
- English
- Abstract:
- Nanostructured La2Ce2O7-doped YSZ coatings were developed using atmospheric plasma-spraying technique by optimizing various process parameters. To ensure the retention of nanostructure, the molten state of nanoagglomerates was monitored using plasma and particle diagnostic tools. It was observed that the morphology of the coating exhibits a bimodal microstructure consisting of nanozones reinforced in a matrix of fully-molten particles. The thermal diffusivity of nano-LaCeYSZ coatings is lower than that of nano and bulk YSZ. The reason for this change in thermal diffusivity may be attributed to scattering of phonons at grain boundaries, point defect scattering and higher inter-splat porosity. Also, the thermal conductivity of the nanocomposite coatings was lower than those of nanostructured and bulk YSZ coatings. XRD results show cubic zirconia with a small amount of tetragonal zirconia. The average grain size of the as-sprayed La2Ce2O7-YSZ nanocomposite coatings is -150-200 nm. The improved thermal behavior is mainly due to a dense, packed, and more compact structure of the coatings.
- Notes:
- Metals. Metallurgy
- Subjects:
- Metallurgy, welding
Métallurgie, soudage
Sciences exactes et technologie
Exact sciences and technology
Sciences appliquees
Applied sciences
Metaux. Metallurgie
Metals. Metallurgy
Transformation de matériaux métalliques
Production techniques
Traitements de surface
Surface treatment
Matériau composite
Composite material
Material compuesto
Verbundwerkstoff
Dopage
Doping
Dopen
Dépôt projection
Spray coating
Depósito proyección
Spritzbeschichten
Microstructure
Microestructura
Mikrogefuege
Nanocomposite
Nanocompuesto
Nanostructure
Nanoestructura
Plasma
Projection plasma
Plasma spraying
Proyección plasma
Plasmaspritzen
Projection à chaud
Hot spraying
Proyección en caliente
Spritzen
Revêtement composite
Composite coating
Revestimiento compuesto
Traitement surface
Surface treatment
Tratamiento superficie
Oberflaechenbehandlung
Zircone stabilisée
Stabilized zirconia
Zircona estabilizada
La2Ce2O7
nanocomposite coating
nanozones
phonon scattering
plasma spraying - Format:
- Academic Journal
- Database:
- PASCAL Archive
- Journal:
- Development and Applications of Nanocomposite Coatings
- Volume:
- 23
- Issue:
- 7
- Page Start:
- 1073
- Page Count:
- 8
- ISSN:
- 10599630
- Publisher:
- Heidelberg: Springer, 2014.
- Document Type:
- Article
- Physical Description:
- print, 33 ref
