This paper introduces a highly durable functional multilayer coating (FMCs) with outstanding mechanical properties using comprehensive design principles. Architecting the layers with degrees of freedom in structure and thickness is the core idea to design WC/DLC FMC. This concept seeks to combine advantages of superior properties of single-layer metal, ceramic, and carbon coatings, without compromising with weaknesses. This research creates a pioneering integration platform that combines the current understanding of materials properties across scale and optimization of interfacial characteristics of ultra-thin films through the combination of theoretical and experimental studies. The aim of this study is to introduce a significant improvement for multilayer sustainability of properties and mechanical strength such as ultra-high hardness (>45 GPa) combined with high elasticity (H/E ~0.15), creep deformation recovery and ultra-durability in macro-scale wear (wear rate <10−13) of WC/DLC multi-nanolayer. “Interface engineering” through the methodology of coating-by-design and concept-based heat treatment creates the gradient structural characteristics, which is called hierarchical multilayer coating (FMC) surface protection concept in this study.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1H1A2039657 ) and Brain Korea 21 plus Project in 2018 and 2019. The authors would like to thank the University of Tehran for the lab facilities used during this research work.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry