Mechanical behavior and limits to the microhardness testing of hard multilayer coatings on soft substrates

Ilze Manika; Faina Muktepavela; Gunnar Sorensen

doi:10.1117/12.375454

25 January 2000 Mechanical behavior and limits to the microhardness testing of hard multilayer coatings on soft substrates

Ilze Manika, Faina Muktepavela, Gunnar Sorensen

Author Affiliations +

Proceedings Volume 4064, Third International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering; (2000) https://doi.org/10.1117/12.375454
Event: Third International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, 1999, St. Petersburg, Russian Federation

Abstract

Multilayer coatings of (Ti, Al) N_x, (Ti, C)N_x and (Nb, C)N_x with bilayer thickness of 0.8 - 8 nm have been deposited by reactive sputtering on stainless steel substrates. Vickers microhardness measurements in the load range of 3.10^-3 to 1 N were performed using a self- adjusting tester. It has been shown that in order to obtain the true hardness of multilayer coatings on a softer substrate, the indentation depth should not exceed about 10% of the coating thickness. Indentation criteria for polycrystalline, amorphous and nanostructured multilayer coatings are compared. The obtained criterion for multilayer coatings is close to that for amorphous films.

Citation Download Citation

Ilze Manika, Faina Muktepavela, and Gunnar Sorensen "Mechanical behavior and limits to the microhardness testing of hard multilayer coatings on soft substrates", Proc. SPIE 4064, Third International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering, (25 January 2000); https://doi.org/10.1117/12.375454

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