| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Functional and Structural Thin Films and Coatings & Honorary Palkowski Session
|
| Presentation Title |
Thermal Stability and Residual Stresses in Nanolamellar CVD TiAlN Coatings Investigated by In Situ Synchrotron Diffraction |
| Author(s) |
Kristine Bakken, Olof Bäcke, Mats Halvarsson, Magnus Hörnqvist Colliander |
| On-Site Speaker (Planned) |
Kristine Bakken |
| Abstract Scope |
Thin wear resistant coatings are essential for increasing the service life of tools for metal cutting. Cubic TixAl1-xN has long been an important system, but is hampered by the upper limit of the Al content (<0.7) imposed by the physical vapor deposition (PVD) process, where higher concentration results in formation of detrimental hexagonal AlN phase. Recently, novel low pressure chemical vapor deposition (CVD) techniques have been used to synthesize fully cubic coatings with Al as high as 0.95. These coatings present very interesting nanolamellar structures, with alternating Ti-rich and Al-rich layers of thicknesses in the order of a few to a few tens of nm. The current knowledge about the thermal stability of these coatings is very limited. Here we have used in situ high energy synchrotron X-ray diffraction to perform detailed investigations of the phase stability and temperature dependent residual stresses. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Characterization, Surface Modification and Coatings |