journal article·2022-07-19Open access

Mechanical Properties and Thermal Stability of CrZrN/CrZrSiN Multilayer Coatings with Different Bilayer Periods

Hoe-Kun Kim, Sung-Min Kim, Sang-Yul Lee

Coatings· Volume 12· Issue 7

Abstract

The CrZrN/CrZrSiN multilayer coatings at a bilayer period range decreasing from 1.35 μm to 0.45 μm were synthesized on a Si (100) wafer and WC-6 wt.% Co substrate using a closed-field unbalanced magnetron sputter, and the thickness effects on the mechanical properties and thermal stability were investigated. The CrZrN/CrZrSiN multilayer coatings showed high hardness and elastic modulus in the ranges of 28 to 33 GPa and 255 to 265 GPa, respectively, and the friction coefficient showed the lowest value of 0.24 on the multilayer coating with a bilayer period of 0.54 μm. The bilayer periods affected the adhesion strength of the multilayer coatings. From the scratch test, the critical load (Lc2) steadily increased with the decreasing of the bilayer period, and the CrZrN/CrZrSiN multilayer coating with a bilayer period of 0.45 μm showed the highest critical load (Lc2) of 79 N. In the case of the annealing test, the bilayer periods affected the thermal stability of the multilayer coatings, and the CrZrN/CrZrSiN multilayer coatings with 0.54 μm showed a maximum hardness value of approximately 30 GPa up to 800 °C.
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Research context

OpenAlex topics: Metal and Thin Film Mechanics · Diamond and Carbon-based Materials Research · Boron and Carbon Nanomaterials Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Surface Technology and Applications, Department of Materials Engineering, Korea Aerospace University, Goyang 10540, Korea

Heat & Surface Technology R&D Department, Korea Institute of Industrial Technology (KITECH), Incheon 21999, Korea

Funding

Korea Institute of Industrial Technology as “Development of root technology for multi-product flexible production · 2022 Korea Aerospace University Faculty Research Grant

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