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Structural features and tribo-mechanical properties of TiAlBSiN nanocomposite coatings
Oleksandr Pshyk
Abstract
This thesis explores structural features and physical properties of the TiAlSiBN-based coatings with the amorphous structure and gradient nanocomposite microstructure. The gradient TiAlBSiN coating is deposited by means of reactive/non-reactive magnetron sputtering of the composite target AlN–TiB2 –TiSi2. The study reveals that the gradient coating is composed of two layers with the different microstructure and elemental composition. Both layers are based on the crystalline fcc-(Ti, Al)(N,O,B) and hcp-(Al, Ti) (N,O) phases which are encapsulated in a mixed amorphous phase. The top layer of about 220 nm in thickness was composed of fine crystallites with dimensions in the range of 15-40 nm. The bottom layer was formed by non-uniformly distributed nanocrystals of about 5-40 nm. The study of the mechanical and tribological properties reveals the promising elastic properties and relatively high wear resistance of the gradient coating. The amorphous TiAlBSiN coating is deposited by means of non-reactive magnetron sputtering of the composite target AlN–TiB2 –TiSi2 . The studied Al-rich amorphous TiAlBSiN coating showed relatively better thermal stability in oxidative environment in comparison to the TiAlBSiN-based coatings reported in the literature previously. The micro-scale tribological measurements of TiAlBSiN amorphous coating showed very promising tribological characteristics.- Record ID
- UAM3db94b73774046c080a1e8b70d8def17
- Diploma type
- Doctor of Philosophy
- Author
- Oleksandr Pshyk Oleksandr Pshyk
- Title in Polish
- Cechy strukturalne i właściwości trybo-mechaniczne powłok nanokompozytowych TiAlBSiN
- Title in English
- Structural features and tribo-mechanical properties of TiAlBSiN nanocomposite coatings
- Language
- en English
- Certifying Unit
- Faculty of Physics (SNŚ/WyF/FoP)
- Discipline
- physics / (physical sciences domain) / (physical sciences)
- Scientific discipline (2.0)
- Defense Date
- 29-01-2018
- End date
- 29-01-2018
- Supervisor
- URL
- http://hdl.handle.net/10593/21355 opening in a new tab
- Keywords in English
- nanocomposite, mechanical properties, protective coatings, microstructure, amorphous coating
- Abstract in English
- This thesis explores structural features and physical properties of the TiAlSiBN-based coatings with the amorphous structure and gradient nanocomposite microstructure. The gradient TiAlBSiN coating is deposited by means of reactive/non-reactive magnetron sputtering of the composite target AlN–TiB2 –TiSi2. The study reveals that the gradient coating is composed of two layers with the different microstructure and elemental composition. Both layers are based on the crystalline fcc-(Ti, Al)(N,O,B) and hcp-(Al, Ti) (N,O) phases which are encapsulated in a mixed amorphous phase. The top layer of about 220 nm in thickness was composed of fine crystallites with dimensions in the range of 15-40 nm. The bottom layer was formed by non-uniformly distributed nanocrystals of about 5-40 nm. The study of the mechanical and tribological properties reveals the promising elastic properties and relatively high wear resistance of the gradient coating. The amorphous TiAlBSiN coating is deposited by means of non-reactive magnetron sputtering of the composite target AlN–TiB2 –TiSi2 . The studied Al-rich amorphous TiAlBSiN coating showed relatively better thermal stability in oxidative environment in comparison to the TiAlBSiN-based coatings reported in the literature previously. The micro-scale tribological measurements of TiAlBSiN amorphous coating showed very promising tribological characteristics.
- Thesis file
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- File: 1
- Structural features and tribo-mechanical properties of TiAlBSiN nanocomposite coatings, File Pshyk_Doctoral thesis.pdf / 8 MB
- Pshyk_Doctoral thesis.pdf
- publication date: 02-01-2020
- Structural features and tribo-mechanical properties of TiAlBSiN nanocomposite coatings, File Pshyk_Doctoral thesis.pdf / 8 MB
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- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/phd/UAM3db94b73774046c080a1e8b70d8def17/
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