Nanostructured Coatings with Self-Healing and Temperature Homogenization Functions for High Temperature Sliding Interfaces
Abstract
Within the present project, three different approaches to synthesize multifunctional low-friction nanocomposite coatings by sputter deposition have been explored, i.e. unalloyed ZrO2 to investigate the effect of different deposition parameters on phase formation, ZrO2 films with Ag addition, and finally ZrO2 films with V addition. The knowledge on controlling phase formation during synthesis of ZrO2 coatings by magnetron sputtering is the basis for the future exploitation of the stress-induced transformation of metastable ZrO2 phases and for possible crack stopping and self-healing mechanisms. While synthesis of Ag containing ZrO2 films was hampered by formation of Ag clusters and agglomerates, the addition of V allows combining self-lubricious properties with strong endothermic reactions of phase-change materials suitable for reduction of local flash temperatures in tribological hot spots in the temperature range between 600 and 800 deg C. The project has contributed to a significant progress in widening the functionality and reliability of nanostructured coatings with added functionalities for highly loaded sliding contacts operated in broad temperature ranges.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2010
- Accession Number
- ADA535191
Entities
People
- Christian Mitterer