Study of the Structural and Mechanical Properties of Nanocrystalline TiAlSiN Gradient Coatings
- Cholakova, T.
- Chitanov, V.
- Chaliampalias, D.
- Kolaklieva, L.
- Kakanakov, R.
- Bahchedjiev, Ch.
- Petkov, N.
- Pashinski, Ch.
- Vourlias, G.
- Vouroutzis, N.
- Polychroniadis, E.
- Wang, Y.
- Meletis, E. I.
Publication date
January 2014
DOIAbstract
A study of the structural and mechanical properties of nanocrystalline TiAlSiN gradient coatings deposited by cathodic arc deposition techniques at 500 degrees C and post-annealed at 525 degrees C is presented. Analysis of the coatings, chemical composition and microstructure revealed that the coatings have a structure based on (Ti, Al)N nanocrystals with an average size of 10 nm embedded in an amorphous Si3N4 phase. The study of the mechanical properties showed that post-annealing causes improvement and increase of the coatings hardness. A maximum hardness of 48 GPa and elastic modulus of 560 GPa were measured. Also, excellent adhesion to the WC-Co substrate was observed in the post-annealed coatings.</p
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