Max Planck Institute for Plasma Physics,
Oleksiy V. Penkov
Center for Nano-Wear, Department of Mechanical Engineering, Yonsei University,
Seoul, South Korea
Advanced energy generating machines require highly durable surface protecting coatings for their components. Even a modest few percent reduction in the failure of the coatings by preventing the fatigue, reducing the creep deformation, inhibiting the excessive wear and corrosion will enormously affect the energy security and introduce environmental benefits. Recent progresses in the fields of materials by design and surface engineering opened entirely new possibilities to hierarchically protect surfaces by designing functionally gradient and layered coatings. Despite remarkable progresses in the field of multilayer fabrication, synthesis, and characterization, design principles for developing multilayer coatings remain to be investigated. The role of interfaces in the overall properties of the multilayer, in the shadow of the layers, is also nearly neglected from investigation.
The main reasons for the remarkable gap in the field are categorized as follows.
Lack of theoretical knowledge and experimental database to validate empirical studies for predicting classical multilayer coating responses.
Lack of optimized design and reliable, i.e., proof-based, deposition guidelines for the fabrication of principle-based multilayers.
This special issue could make a platform to integrate the advances and progresses in the field of ultra-durability for energy generating machine components protected by thin films and coatings. This hopefully will contribute in building a pioneering research data base for the design and fabrication of a variety of harsh-condition-resistant coatings and multilayers with realization of their industrial application potential. The aim is to highlights a critical need for further fundamental studies in the mechanics and thermodynamics of interfaces and layer engineering in the field of multilayer and advanced coating for superior surface protection.