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Properties of alumina–titania coatings prepared by laser-assisted air plasma spraying

Par Conseil national de recherches du Canada

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DOITrouver le DOI : https://doi.org/10.1016/j.surfcoat.2006.11.026
AuteurRechercher : 1; Rechercher : 1; Rechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Institut des matériaux industriels du CNRC
FormatTexte, Article
SujetLaser-assisted air plasma spraying; Alumina-titania; Erosive wear; Abrasive wear
Résumé
Studies have shown that microstructures formed by post-laser remelting of air plasma sprayed coatings exhibit densification but also numerous macrocracks due to the rapid cooling and thermal stresses. In laser-assisted air plasma spraying (LAAPS) process, the laser beam interacts simultaneously with the plasma torch in order to increase the temperature of the coating and possibly remelt the coating at the surface. As a result, the microstructure is partially densified and macrocracks, which are generally produced in the post-laser irradiation treatment, may be inhibited. In this paper, LAAPS was performed to improve the hardness and wear resistance of Al₂O₃–13%TiO₂ coatings. These coatings prepared by air plasma spraying (APS) are widely used to protect components against abrasive wear at low temperatures. The coating microstructure was characterized by SEM and X-ray diffraction. The mechanical characterization was done by hardness measurements, erosive wear tests and abrasion wear tests. Results showed that laser assistance may improve the microstructural and mechanical properties. Phenomena involved in LAAPS of alumina–titania coatings are discussed in this paper.
Date de publication
Dans
  • Surface & Coatings Technology 201, nº 14 (2 janvier 2007) : 6278–6284.
Langueanglais
Publications évaluées par des pairsOui
Numéro du CNRCNRCC 49405
AMTC-2008-0036
Numéro NPARC15820153
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Identificateur de l’enregistrementbac13786-3604-4b4b-8dc8-aef6d9b3826d
Enregistrement créé2010-07-19
Enregistrement modifié2020-05-10
Date de modification :