Evaluation for shearing strength of coating and substrate by burying beforehand specimen

Abstract

The adherent strength of shearing is an important criterion in evaluating the quality of coating layers, and it is also the foundation to optimize manufacturing. The conventional way of adhesion strength test for thick layers is the pull-off method and lateral shearing method. The drawbacks of these two methods are discussed in this paper, and an evaluating method for coating adherence by beforehand embedded specimen is proposed. The shearing strength of samples is measured with two methods. The scatter band of the testing data is lower than that of the ASTM-C663-79 Standard.

Keywords

coating / shearing / adherent strength

References

[1] Zheng S L, He J W, Zhang P Y,. Research and development of testing method for adhesion strength of coating file/substrate. Membrane Science and Technology, 1993, 6(2): 85–92 (in Chinese)

[2] Richard P, Thomas J, Landolt D,. Combination of scratch-test and acoustic microscopy imaging for the study of coating adhesion. Surface and Coatings Technology, 1997, 91(1–2): 83–90

[3] <patent>ASTM C633-79</patent>. Standard Test method for adhesion or cohesive strength of flame-sprayed coatings.ASTM International, 1999, 7 pages

[4] Rhyim Y M, Park C G, Kim S B,. Mechanical properties of WC-Co coating prepared by detonation gun spraying. In: Proceedings of the 14th International Thermal Spray Conference: Current Status and Future Trends. Kobe, Japan: ITSC’95, 1995, 773–778

[5] Han W, Rybicki E F, Shadley J R. Application of fracture mechanics to the interpretation of bond strength data from ASTM standard C633–79. Journal of Thermal Spray Technology, 1993, 2(3): 235–241

[6] Zhu Y L, Xu B S, Ma S N. Finite element evaluation of a test standard for coating shear strength determination. Chinese Journal Engineering, 1999, (2): 81–84

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant No. 59975031).

RIGHTS & PERMISSIONS

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg