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HomeSolid State PhenomenaSolid State Phenomena Vol. 337Assessment of Shear Bond Strength of Thermal Spray...

Assessment of Shear Bond Strength of Thermal Spray Coatings by Applying Prismatic Samples

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Abstract:

The purpose of this study was the research for a non-standardized method of measuring the shear bond strength at constant compression force and compare with the shear testing methods on cylindrical and prismatic samples, like DIN 50161:1977-10, DIN EN15340-2007. The conducted comparative analysis showed a significant shortcoming of the well-known methods for assessing the shear bond strength on samples for industrial application. The main one is an inability to measure the “actual/real” adhesion shear strength of thermal spray coatings for industrial parts. The shear bond strength of plasma-sprayed coating MgAl₂O₄ with thickness 0.30-has been investigated by applying the prismatic samples (linear dimensions of shear area 1.5-), using Nanovea scratch tester at compression forces ranging from 1 to 70 N. Shear force-displacement curves get essential information about adhesion/cohesion, delamination and cracking properties of thermal spray coating. An increase of shear forces is primarily associated with a rise in friction forces at the coating delamination boundary. Applying for parts of the ITER blanket modules, this research has demonstrated the importance of practical application of the shear testing results at compressive loads for ensuring product life.

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Periodical:

Solid State Phenomena (Volume 337)

Pages:

35-41

DOI:

https://doi.org/10.4028/p-297el3

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Cite this paper

Online since:

October 2022

Authors:

A.N. Zaytzev*, A.N. Lukianova, D.A. Demoretsky

Keywords:

Adhesion Shear Strength, Al₂O₃, Blanket Module, ITER, MgAl₂O₄, Plasma Sprayed Coating

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* - Corresponding Author

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