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Relationship between surface topgraphy parameters and adhesion strength for plasma spraying
University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.ORCID iD: 0000-0001-7787-5444
2005 (English)In: ITSC 2005: Thermal Spray connects: Explore its surfacing potential!, The Material Information Society , 2005, p. 1027-1031Conference paper, Published paper (Refereed)
Abstract [en]

To achieve sufficient adhesion strength within thermal spraying, the surface to be coated has to be modified. Grit blasting is the most common way to generate a clean and roughened surface. The bonding mechanism between the grit-blasted substrate and the coating is assumed to be due to mechanical anchoring, why an optimal surface roughness is essential. The surface roughness is usually evaluated using Ra which cannot fully characterize the complex nature of the chaotic substrate topography. This study was performed in order to evaluate if Ra can be replaced by other surface characteristic parameters such us R.q, Rpk, Rpv, Rk…with higher correlation to adhesion strength. Average roughness was measured by a perthometer and with white light interferometry to get 3D images of the surface topography. Disc shaped substrate samples of Ti6Al4V (AMS 4928) were grit blasted with aluminium oxide grit and plasma sprayed with a Ni5%Al coating. Adhesion strength was determined according to the ASTM C633 standard. The correlation between a number of different surface-parameters and adhesion strength were evaluated and compared with Ra.

Place, publisher, year, edition, pages
The Material Information Society , 2005. p. 1027-1031
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-141OAI: oai:DiVA.org:hv-141DiVA, id: diva2:211926
Available from: 2009-04-20 Created: 2009-04-20 Last updated: 2015-03-17Bibliographically approved
In thesis
1. A study of the adhesion strength of plasma sprayed coatings
Open this publication in new window or tab >>A study of the adhesion strength of plasma sprayed coatings
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Göteborg: Chalmers University of Technology, 2007. p. 40
Series
Doktorsavhandlingar vid Chalmers tekniska högskola, ISSN 0346-718X ; 2637
Keywords
Grit blasting, Thermal spraying, Coating, Surface pre-treatment, Surface roughness, Fractal analysis, Adhesion strength, Mechanical anchoring, Protal® process, Splat
National Category
Production Engineering, Human Work Science and Ergonomics Metallurgy and Metallic Materials
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
urn:nbn:se:hv:diva-163 (URN)
Public defence
(English)
Note
Delad utgivning: Trollhättan : Department of Technology, Mathematics and Computer Science, University WestAvailable from: 2009-04-21 Created: 2009-04-21 Last updated: 2010-01-08Bibliographically approved

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Nylén, Per

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