A comparative study on slurry erosion behavior of HVOF sprayed coatings

In actual work, slurry erosion behavior of three different HVOF sprayed cermet coatings has been studied. The coatings were developed using the powders feedstock having WC fine structured sizes, Cr3C2-NiCr 75-25 and NiCrWSiFeB, latter conventional grain sizes. The slurry erosion testing was performe...

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Autores:
Reyes-Mojena, Miguel Ángel
Sánchez-Orozco, Mario
Carvajal-Fals, Hipólito
Sagaro Zamora, Roberto
Camello-Lima, Carlos Roberto
Tipo de recurso:
Article of journal
Fecha de publicación:
2017
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/60344
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/60344
http://bdigital.unal.edu.co/58676/
Palabra clave:
62 Ingeniería y operaciones afines / Engineering
slurry erosion
nanostructured coatings
HVOF, thermal spray coatings
desgaste en mezcla erosiva
recubrimientos nanoestructurados
HVOF
recubrimientos por proyección térmica
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
Description
Summary:In actual work, slurry erosion behavior of three different HVOF sprayed cermet coatings has been studied. The coatings were developed using the powders feedstock having WC fine structured sizes, Cr3C2-NiCr 75-25 and NiCrWSiFeB, latter conventional grain sizes. The slurry erosion testing was performed using a laboratory made pot-type slurry erosion tester, at an impact velocity of 3.61m/s and 9.33 m/s and impact angle of 30 and 90º. The mechanism of material removal in slurry erosion was studied and discussed on microstructural investigations and mechanical properties under the erosion conditions. It was observed that the WC-CoCr cermet coating with fine WC grain exhibits higher erosion resistance as compared to conventional cermet coating due to its improved properties like low porosity, high micro-hardness and fracture toughness.