Título
Surface oxidation of Ni20Cr/Cr3O2 composite processed by ball milling and HVOF thermal spraying
Autor
ISRAEL LOPEZ BAEZ
ENRIQUE MARTINEZ FRANCO
LUIS GERARDO TRAPAGA MARTINEZ
Carlos Agustín Poblano Salas
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: 10.1016/j.vacuum.2017.07.011
Referencia de publicación
ISSN/0042-207X
URL/https://www.sciencedirect.com/science/article/pii/S0042207X17303603
Materias
Composite powder - (PALABRA CLAVE DEL AUTOR) Oxide dispersion - (PALABRA CLAVE DEL AUTOR) Ball milling - (PALABRA CLAVE DEL AUTOR) Oxide layer - (PALABRA CLAVE DEL AUTOR) HVOF coating - (PALABRA CLAVE DEL AUTOR) INGENIERÍA Y TECNOLOGÍA - (CTI) CIENCIAS TECNOLÓGICAS - (CTI) TECNOLOGÍA METALÚRGICA - (CTI) PULVIMETALURGIA - (CTI) PULVIMETALURGIA - (CTI)
Resumen o descripción
A Ni20Cr/Cr2O3 composite powder was successfully processed by controlling different mechanical milling conditions. The powder was heat treated at various temperatures to evaluate the effects of fine Cr2O3 particles additions on the microstructure of the Ni20Cr matrix. Thermogravimetric analysis indicated an earlier oxidation temperature of the composite powder (250e270 C) compared to the oxidation temperature of the Ni20Cr matrix (680e700 C), the fine Cr2O3 particles may act as nucleation sites to promote matrix oxidation at lower temperatures. Ni20Cr/Cr2O3, commercial, and experimental Ni20Cr powders were used as feedstock to produce coatings by HVOF thermal spraying. Raman studies showed NiCr2O4 and Cr2O3 as main phases in the microstructure of Ni20Cr/Cr2O3 composite coating. A residual Ni20Cr phase, processed by ball milling, was preserved in the coatings microstructure; such a phase improved oxygen and chromium diffusion, then allowing the formation of a thick oxide protective layer in the coatings during oxidation tests. Oxide scales produced during sliding wear test were strongly anchored to the Ni20Cr/Cr2O3 coating surface, a wear rate of 20.2 10 6 mm3/N$m was measured when such a coating was tested employing a pin-on-disc configuration.
Editor
Elsevier B. V.
Fecha de publicación
2017
Tipo de publicación
Artículo
Versión de la publicación
Versión aceptada
Recurso de información
Formato
application/pdf
Fuente
Vacuum Volume 144, October 2017, Pages 27-35
Idioma
Inglés
Audiencia
Público en general
Sugerencia de citación
López-Báez, Israel, Enrique Martínez-Franco, Carlos Agustín Poblano-Salas, and Luís Gerardo Trápaga-Martínez. 2017. “Surface Oxidation of Ni20Cr/Cr3O2 Composite Processed by Ball Milling and HVOF Thermal Spraying.” Vacuum 144: 27–35. http://www.sciencedirect.com/science/article/pii/S0042207X17303603 (February 7, 2018).
Repositorio Orígen
CIATEQ Digital
Descargas
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