| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2018) | |
| Thin Films | Wednesday Sessions |
| Session TF-WeP |
| Session: | Thin Films Poster Session II |
| Presenter: | Wang Ryeol Kim, Korea Institute of Industrial Technology (KITECH), South Korea |
| Authors: | W.-R. Kim, Korea Institute of Industrial Technology (KITECH), South Korea S. Heo, Korea Institute of Industrial Technology (KITECH), South Korea H. Kim, Korean Institute of Industrial Technology (KITECH), South Korea J. Kim, Korea Institute of Industrial Technology (KITECH), South Korea I.W. Park, Korea Institute of Industrial Technology (KITECH), South Korea |
| Correspondent: | Click to Email |
Functional graded TiAlSiNO nanocomposite films were deposited onto WC-Co substrate by a filtered arc ion plating system using TiAl and TiSi composite targets under N2/Ar atmosphere. XRD and XPS analyses revealed that the synthesized TiAlSiNO films were nanocomposite consisting of nanosized (Ti,Al,Si)N crystallites embedded in an amorphous Si3N4/SiO2 matrix. The hardness of the TiAlSiNO films exhibited the maximum hardness values of ∼47GPa at a Si content of ~5.63 at.% due to the microstructural change to a nanocomposite as well as the solid-solution hardening. Besides, TiAlSiNO film with Si content of around 5.63at.% also showed perfect adhesive strength value of 105.3N. These excellent mechanical properties of Ti-Al-Si-N-O films could be help to improve the performance of machining tools and cutting tools with application of the film. Also X-ray diffactometer (XRD) analysis was conducted to investigate the crystallinity and phase transformation of the films. As a result of XRD, TiAl(18at.%)SiNO films showed the great oxidation resistance of 950℃ for 30 min in air. Based on glow discharge optical emission spectroscopy (GD-OES) depth profiles, TiAl(18at.%)SiNO film annealed at 950℃ for 30 min shows formation of aluminum oxide layer on the film surface. On the other hand, TiAl(7.56at.%)SiNO film had a titanium oxide layer on the surface after annealing at 950℃ for 30 min. In this study, TiAlSiNO coatings were applied to insert tools. Their performances were evaluated about cutting-time and cutting-length to Inconel 718 super alloys. Performance of the coated tools were evaluated and compared with different TiAlSiNO coatings onto cemented carbide substrates. Especially, the TiAlSi(5.63at%)N coated tool showed better performance and best tool life.