Microstructure and mechanical properties of arc evaporated Ti(Al,Si)N coatings
Research output: Contribution to journal › Article › Research › peer-review
Standard
In: Surface & coatings technology, Vol. 421.2021, No. 15 September, 127461, 15.09.2021.
Research output: Contribution to journal › Article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - Microstructure and mechanical properties of arc evaporated Ti(Al,Si)N coatings
AU - Moritz, Yvonne
AU - Kainz, Christina
AU - Tkadletz, Michael
AU - Czettl, Christoph
AU - Pohler, Markus
AU - Schalk, Nina
N1 - Publisher Copyright: © 2021 The Author(s)
PY - 2021/9/15
Y1 - 2021/9/15
N2 - Ti(Al)SiN protective hard coatings are promising candidates for the metal cutting industry, due to their favorable properties such as a high hardness and good oxidation resistance. Within the scope of this work, the microstructure of cathodic arc evaporated TiN, Ti 84Si 16N, Ti 81Al 3Si 16N and Ti 70Al 14Si 16N was correlated with their mechanical properties. X-ray diffraction (XRD) as well as scanning electron microscopy investigations of the cross-sections revealed a pronounced grain refinement for Ti(Al)SiN compared to TiN. The texture of the coatings was analyzed by XRD pole-figures, showing a change in the preferred orientation in growth direction from (111) for TiN to (200) for Ti(Al)SiN. Hardness values were found to strongly increase from 29 GPa to 40 GPa upon Si addition, but remained constant for further alloying with Al. Micromechanical bending tests allowed to gain a detailed insight into the fracture properties of the investigated coatings and revealed an enhanced fracture stress and fracture toughness (K IC) for Ti(Al)SiN compared to TiN. Hereby, the K IC value of 2.4 ± 0.3 MPa m 1/2 for TiN could be increased to a maximum of 3.3 ± 0.2 MPa m 1/2 for Ti 70Al 14Si 16N. The present findings provide a systematic overview of the microstructure and mechanical properties of arc evaporated Ti(Al,Si)N coatings, thus allowing to select the most suitable coatings for different applications in the cutting industry.
AB - Ti(Al)SiN protective hard coatings are promising candidates for the metal cutting industry, due to their favorable properties such as a high hardness and good oxidation resistance. Within the scope of this work, the microstructure of cathodic arc evaporated TiN, Ti 84Si 16N, Ti 81Al 3Si 16N and Ti 70Al 14Si 16N was correlated with their mechanical properties. X-ray diffraction (XRD) as well as scanning electron microscopy investigations of the cross-sections revealed a pronounced grain refinement for Ti(Al)SiN compared to TiN. The texture of the coatings was analyzed by XRD pole-figures, showing a change in the preferred orientation in growth direction from (111) for TiN to (200) for Ti(Al)SiN. Hardness values were found to strongly increase from 29 GPa to 40 GPa upon Si addition, but remained constant for further alloying with Al. Micromechanical bending tests allowed to gain a detailed insight into the fracture properties of the investigated coatings and revealed an enhanced fracture stress and fracture toughness (K IC) for Ti(Al)SiN compared to TiN. Hereby, the K IC value of 2.4 ± 0.3 MPa m 1/2 for TiN could be increased to a maximum of 3.3 ± 0.2 MPa m 1/2 for Ti 70Al 14Si 16N. The present findings provide a systematic overview of the microstructure and mechanical properties of arc evaporated Ti(Al,Si)N coatings, thus allowing to select the most suitable coatings for different applications in the cutting industry.
UR - http://www.scopus.com/inward/record.url?scp=85109027234&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2021.127461
DO - 10.1016/j.surfcoat.2021.127461
M3 - Article
VL - 421.2021
JO - Surface & coatings technology
JF - Surface & coatings technology
SN - 0257-8972
IS - 15 September
M1 - 127461
ER -
