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2001

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/18205

Structural characterization of laser-treated Cr3C2-NiCr coatings

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Recurs relacionat

http://dx.doi.org/10.1557/JMR.2001.0470

Resum

The interconnected porosity of the Cr3C2-NiCr coatings obtained by high-velocity oxy fuel spraying is detrimental in corrosion and wear resistance applications. Laser treatments allow sealing of their surfaces through melting and resolidification of a thin superficial layer. A Nd:YAG laser beam was used to irradiate Cr3C2-NiCr coatings either in the continuous wave mode or at different repetition rates in the pulsed one. Results indicated that high peak and low mean laser irradiances are not good, since samples presented deep grooves and an extensive crack network. At low peak and higher mean laser irradiances the surface was molten, and only a few shallow cracks were observed. The interconnected porosity was completely eliminated in a layer up to 80 m thick, formed by large Cr7C3 grains imbedded in a NiCr matrix.

Matèries

Làsers, Crom, Revestiments protectors, Corrosió i anticorrosius

Matèries (anglès)

Lasers, Chromium, Protective coatings, Corrosion and anti-corrosives

Citació

Col·leccions

Articles publicats en revistes (Física Aplicada)
Articles publicats en revistes (Ciència dels Materials i Química Física)

Citació

SERRA COROMINA, Pere, et al. Structural characterization of laser-treated Cr3C2-NiCr coatings. Journal of Materials Research. 2001. Vol. 16, num. 12, pags. 3416-3422. ISSN 0884-2914. [consulted: 19 of July of 2026]. Available at: https://hdl.handle.net/2445/18205

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