Ti-Al, Graded Al/AlTi, and Ti-Al-N Coatings Prepared by Supersonic Free-Jet PVD

• Yumoto Atsushi

  Department of Mechanical Systems Engineering, Faculty of Engineering, Kogakuin University

• Yamamoto Takahisa

  Department of Advanced Materials Science, Graduate School of Frontier Sciences, University of Tokyo

• Hiroki Fujio

  Department of Mechanical Systems Engineering, Faculty of Engineering, Kogakuin University

• Shiota Ichiro

  Department of Materials Science and Technology, Faculty of Engineering, Kogakuin University

• Niwa Naotake

  Department of Mechanical Systems Engineering, Faculty of Engineering, Kogakuin University

Abstract

The authors previously developed Supersonic Free-Jet PVD (SFJ-PVD) as a new coating method in which a coating film is formed by depositing nanoparticles at very high velocity onto a substrate. This SFJ-PVD provides a rapid deposition rate and produces a mixture of different kinds of nanoparticles formed in different evaporation chambers on the substrate. This paper describes the preparation of graded Al/AlTi, Ti-Al, and Ti-Al-N coating films with SFJ-PVD. Ti-50 at%Al film and graded Al/AlTi film are produced by depositing Al and Ti nanoparticles formed in different evaporation chambers with the controlled evaporation rates of Al and Ti. Ti-Al-N film is produced by depositing nanoparticles formed in the evaporation chamber with a controlled partial pressure of N₂ in an atmosphere of He. Mixing Ti and Al nanoparticles by depositing them onto a substrate produces in-situ syntheses of γ-TiAl and α₂-Ti₃Al intermetallic compounds on the substrate regardless of the substrate temperature in these experimental conditions. A smooth, compact, and defect-free structure is formed both at the interface between the substrate and the coating films and inside the coating films. XRD analysis reveals the crystal structure of the Ti-Al-N film to be TiN, Ti₃Al₂N₂, Ti₃AlN, and AlN.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 45 (5), 1620-1623, 2004

  The Japan Institute of Metals and Materials

Keywords

• nanoparticle
• functionally graded material
• supersonic gas flow
• titanium-aluminides
• titanium-aluminum-nitrides

Details

• CRID: 1390001204249510912
• NII Article ID: 10013071576
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.45.1620
• COI: 1:CAS:528:DC%2BD2cXkvFyjtbY%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 6951453
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6951453
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/45/5/45_5_1620/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed