Hardness and nitrogen bonding structure of Al xTi 1-xN/CrN multilayer hard coating

Jong Hyun Seo, Sang Won Yoon, Keun Hwa Chae, Jong Keuk Park, Jong Han Song, Vickram Jayaram, Kon Bae Lee, Tae Yeon Seong, Hoon Kwon, Jae Pyoung Ahn

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Al xTi 1-xN/CrN multilayer coatings were fabricated by magnetron sputtering and those hardness variations were studied by observing the crack propagation and measuring the chemical bonding state of nitrides by Ti addition. While AlN/CrN multilayer shown stair-like crack propagation, Al xTi 1-xN/CrN multilayer illustrated straight crack propagation. Most interestingly, Ti addition induced more broken nitrogen bonds in the nitride multilayers, leading to the reduction of hardness. However, the hardness of Al 0.25Ti 0.75N/CrN multilayer, having high Ti contents, increased by the formation of many Ti-N bond again instead of Al-N bond. From these results, we found that linear crack propagation behavior was dominated by broken nitrogen bonds in the Al xTi 1-xN/CrN multilayer coatings.

Original languageEnglish
Pages (from-to)1581-1584
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Issue number2
Publication statusPublished - 2012


  • AlN/CrN
  • AlTiN/CrN
  • Broken nitrogen bond
  • Crack propagation
  • Multilayer hard coating

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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