Development of PVD - TiAlN/a-C nanocomposite coating for pressure die casting applications

Masateru Nose*, Tokimasa Kawabata, Miki Ohi, Takekazu Nagae, Seiichi Masa, Yuji Hatano, Susumu Ikeno, Kiyoshi Nogi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In die casting, soldering of the core pin surface is mainly responsible for dimensional tolerance failure of products. A newly designed protective coating for die casting, consisting of TiAlNand amorphous carbon (a-C) with low soldering of magnesium, has been developed by the deposition of reactive cosputtering of TiAl and graphite targets using a UBM sputtering system. Structure analysis by GAXRD, HRTEM, laser Raman spectroscopy, and XPS revealed that the TiAlN/a-C coating has a nanocomposite structure consisting of a complicated mixture of nanocrystalline Ti-Al-N phase and a-C phase. Application of this coating to core pin for magnesium die casting demonstrated the lower tendency to adherence of magnesium alloy than TiAlN coatings and longer lifetime with a total number of ∼276 000 injections.

Original languageEnglish
Pages (from-to)S681-S686
JournalPlasma Processes and Polymers
Volume4
Issue numberSUPPL.1
DOIs
StatePublished - 2007

Keywords

  • Adhesion
  • Nanocomposites
  • PVD
  • Surface modification
  • TEM

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

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