Study of the Structural and Mechanical Properties of Nanocrystalline TiAlSiN Gradient Coatings

T. Cholakova*, V. Chitanov, D. Chaliampalias, L. Kolaklieva, R. Kakanakov, Ch. Bahchedjiev, N. Petkov, Ch. Pashinski, G. Vourlias, N. Vouroutzis, E. Polychroniadis, Y. Wang, E. I. Meletis

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)15-24
Number of pages10
JournalJournal of Nano Research
Volume27
DOIs
Publication statusPublished - 2014

Keywords

  • Cathodic arc deposition
  • Nanocrystalline coatings
  • Nanoindentation
  • Adhesion
  • Transmission electron microscopy
  • X-ray photoelectron spectroscopy
  • (TI,SI,AL)N NANOCOMPOSITE COATINGS
  • SI-N COATINGS
  • THIN-FILMS
  • THERMAL-STABILITY
  • ELASTIC-MODULUS
  • MICROSTRUCTURE
  • HARDNESS
  • INDENTATION
  • DEPOSITION
  • ORIGIN

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