Hot-pressed Ti-Al targets for synthesizing Ti1-xAlxN films by the arc ion plating method

Ayako Kimura, Tomohiro Murakami, Kunihiro Yamada, Tetsuya Suzuki

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Ti and Al powders were mixed with identical atomic ratios and hot-pressed at 650, 800, 950, 1100 and 1250 °C, respectively, for the use of targets in the arc ion plating (AIP) method. As the sintering temperatures increased, the target density monotonously increased and the porosity correspondingly decreased. Chemical analysis by X-ray diffraction indicated that pure Ti and Al phases decreased and intermetallics such as TiAl3 and Ti3Al phases were formed at 800-950 °C. Over 950 °C, the amount of the intermetallics decreased and finally TiAl phase was formed. Next, the Ti-Al targets were arc-discharged in nitrogen plasma and Ti1-xAlxN films were deposited on mirror-polished cemented carbide substrates. The targets with lower density, sintered at 650 and 800 °C, did not easily trigger and keep stable arc-discharge during the deposition. As a result, synthesized Ti1-xAlxN films had a larger number and size of droplets which were not only circular but were also irregular shapes. Although microstructures of Ti-Al targets were quite different, all films mostly consisted of Ti0.5Al0.5N with the NaCl structure and similar hardness with approximately 3000 HV. Further, all Ti0.5Al0.5N films had the same columnar cross-sectional structures and the growth rate was approximately 17 μm/h.

Original languageEnglish
Pages (from-to)101-105
Number of pages5
JournalThin Solid Films
Volume382
Issue number1-2
DOIs
Publication statusPublished - 2001 Feb 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Hot-pressed Ti-Al targets for synthesizing Ti<sub>1-x</sub>Al<sub>x</sub>N films by the arc ion plating method'. Together they form a unique fingerprint.

  • Cite this