High temperature erosion-oxidation resistance of thermally sprayed nanostructured Cr3C2-25(Ni-20Cr) coatings
Carregando...
Data
2017
Data de publicação:
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Materials Research
Exportar
Resumo
This study reports the high temperature erosion-oxidation (E-O) behavior of conventional and
nanostructured Cr3C2-25(Ni-20Cr) coatings prepared by high velocity oxygen fuel (HVOF) spraying.
As-received and nanostructured Cr3C2-25(Ni-20Cr) powders with mean crystallite sizes of 145 nm
and 50 nm respectively, were used to prepare 120 - 200 μm thick coatings on AISI 310 samples. The
E-O behavior of the coatings prepared with the as-received (AR) and nanostructured (NS) powders
was determined as weight change in a custom designed rig at room temperature, 450, 700 and 800 ºC.
The Vickers microhardness, Young’s Modulus and fracture toughness of the AR and NS coatings were
determined, and the NS coatings exhibited higher values compared with the AR coatings. The E-O
resistance of the NS coating was higher than that of AR coating at all temperatures, and particularly at
800 ºC. The increase in E-O resistance of the NS coatings is due to its superior mechanical properties
as well as to the presence of some heterogeneities in the AR coatings. The E-O mechanisms of both
types of the coatings are discussed, with special attention to that at high temperatures. The results
suggest that at 800 ºC the E-O process is controlled by erosion of the oxide.
Como referenciar
CUNHA, CECILIO A. da; CORREA, OLANDIR V.; SAYEG, ISAAC J.; RAMANATHAN, LALGUDI V. High temperature erosion-oxidation resistance of thermally sprayed nanostructured Cr3C2-25(Ni-20Cr) coatings. Materials Research, v. 20, n. 4, p. 994-1002, 2017. DOI: 10.1590/1980-5373-MR-2015-0611. Disponível em: http://repositorio.ipen.br/handle/123456789/28453. Acesso em: 22 Jan 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.