Multiple-Approach Evaluation of WSP Coatings Adhesion/Cohesion Strength
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Adhesion/cohesion testing represents one of the most common methods for benchmarking and optimization of thermal spray coatings. However, owing to the inhomogeneous coating microstructure, such testing may be quite troublesome. In this study, adhesion/cohesion strength of representative metallic and ceramic coatings deposited by water-stabilized plasma (WSP) spraying was evaluated by four different methods: tensile adhesion test, pin test, tubular coating tensile test, and shear test. Combination of various methods enabled the evaluation of the coating adhesion/cohesion strength under different loading conditions. Limitations and benefits of each method for testing of WSP coatings are demonstrated. Dominating failure micromechanisms were determined by supplementary fractographic analysis.
Keywordsadhesion testing adhesive strength alumina cohesion stainless steel water-stabilized plasma
This study was supported by the Grant No. P108/12/P552 (Czech Science Foundation).
- 1.J.R. Davis, Handbook of Thermal Spray Technology, ASM International, Materials Park, OH, 2004, p 338Google Scholar
- 3.“Standard Test Method for Adhesion or Cohesion Strength of Thermal Spray Coatings”, ASTM C633-01, ASTM, 2008, 7 ppGoogle Scholar
- 4.“Thermal Spraying—Determination of Tensile Adhesive Strength”, EN 582, 1996, CEN, 12 ppGoogle Scholar
- 9.“Thermal Spraying—Determination of Shear Load Resistance of Thermally Sprayed Coatings”, EN 15340, 2007, CEN, 15 ppGoogle Scholar
- 10.S. Siegmann, M. Dvorak, H. Grützner, K. Nassenstein, and A. Walter, Shear Testing for Characterizing the Adhesive and Cohesive Coating Strength without the Need of Adhesives, Thermal Spray Connects: Explore Its Surfacing Potential!, E. Lugscheider, Ed., May 2-4, 2005, (Basel), DVS Deutscher Verband für Schweißen, 2005, p 823-829Google Scholar
- 21.M. Hadad, G. Marot, P. Demarecaux, J. Lesage, J. Michler, and S. Siegmann, Adhesion Tests for Thermal Spray Coatings: Application Range of Tensile, Shear and Interfacial Indentation Methods, Thermal Spray Connects: Explore Its Surfacing Potential!, E. Lugscheider, Ed., May 2-4, 2005 (Basel), DVS Deutscher Verband für Schweißen, 2005, p 759-764Google Scholar
- 26.M. Vilémová, J. Siegl, J. Matějíček, and R. Mušálek, Effect of the Grit Blasting Exposure Time on the Adhesion of Al2O3 and 316L Coatings, Thermal Spray 2011: Proceedings of the International Thermal Spray Conference, Sept 27-29, 2011 (Hamburg), DVS Deutscher Verband für Schweißen, 2011, p 1001-1006Google Scholar