Structure and composition of ZrN and (Ti,Al)N coatings
Triode ion plated ZrN and (Ti,Al)N thin films were deposited on high-speed steel and stainless-steel substrates. The samples studied in this work were selected on the basis of their cutting performance in turning tests as reported earlier. In cutting tests (Ti,Al)N and ZrN both showed significantly increased wear life as compared to standard TiN. X-ray diffraction studies revealed for (Ti,Al)N a cubic B-1 NaCl structure with strong (200) orientation. The initial morphology was columnar, but by increasing the substrate current density the columnar growth could be suppressed and a finer structure resulted, while wear life in turning also increased. All ZrN coatings showed B-1 NaCl structure with a (111) preferred orientation. Their fracture surface was always noncolumnar and almost featureless as judged by scanning electron microscopy. However, cross-sectional transmission electron microscopy studies revealed a fine columnar structure also with these films. The ZrN coatings had a uniform through-thickness nuclear resonance broadening nitrogen depth profile, whereas irregularities were observed in the (Ti, Al)N coatings and an uneven aluminum distribution was revealed also by backscattering measurements.
- Research Organization:
- Helsinki University of Technology, Department of Materials Science and Mining, Vuorimiehentie 2A, 02150 Espoo, Finland
- OSTI ID:
- 5312022
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Vol. 6:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM NITRIDES
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
WEAR RESISTANCE
TITANIUM NITRIDES
ZIRCONIUM NITRIDES
CUTTING TOOLS
MICROSTRUCTURE
MORPHOLOGY
PERFORMANCE
SCANNING ELECTRON MICROSCOPY
STAINLESS STEELS
SURFACE COATING
THICKNESS
THIN FILMS
WEAR
ALLOYS
ALUMINIUM COMPOUNDS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
DEPOSITION
DIMENSIONS
ELECTRON MICROSCOPY
FILMS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSCOPY
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
STEELS
TITANIUM COMPOUNDS
TOOLS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties