Morphological characterization and scaling behaviour of WC coatings deposited by HVOF thennal spray (Articolo in rivista)

Type
Label
  • Morphological characterization and scaling behaviour of WC coatings deposited by HVOF thennal spray (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Buzio, R; Chierichetti, A; Bianchi, G; Valbusa, U (2006)
    Morphological characterization and scaling behaviour of WC coatings deposited by HVOF thennal spray
    in Surface & coatings technology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Buzio, R; Chierichetti, A; Bianchi, G; Valbusa, U (literal)
Pagina inizio
  • 6430 (literal)
Pagina fine
  • 6433 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 200 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • UdR Genova, INFM, Dipartimento Fis, I-16146 Genoa, Italy; Flame Spray SpA, Milan, Italy; Dresser Italia Srl, I-27058 Pavia, Italy; Univ Genoa, INFM, I-16146 Genoa, Italy; Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy (literal)
Titolo
  • Morphological characterization and scaling behaviour of WC coatings deposited by HVOF thennal spray (literal)
Abstract
  • We report experimental results on the morphological characterization of WC coatings deposited by High-Velocity-Oxygen-Fuel (HVOF) thermal spraying technique. Optical microscopy has been used to characterize film microstructure from the millimeter down to the micrometer scale; surface roughness and correlation length have been estimated as a function of film thickness. We have observed that analysed specimens display a self-affine morphology with Hurst exponent H=(0.33 +/- 0.05), in agreement with the scaling behaviour associated to the Kardar-Parisi-Zhang stochastic growth equation and to discrete ballistic deposition models. Our findings suggest that the introduction of scaling arguments within refined theoretical frameworks, realistically treating local splats interactions, could allow to directly predict the morphological evolution of coatings, partially overcoming the intrinsic complexity of the HVOF thermal spray process. (c) 2005 Elsevier B.V. All rights reserved. (literal)
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