Commentary on using H/E and H3/E2 as proxies for fracture toughness of hard coatings

Xinjie Chen, Yao Du, Yip Wah Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


While positive correlation between fracture toughness and H/E and H3/E2 has been reported for some ceramic coatings, we outline an argument that such correlation cannot be true in general, especially for nanolayer and nanocomposite coatings that present multiple interfaces to impede crack growth. Literature data are presented to support this argument.

Original languageEnglish (US)
Article number137265
JournalThin Solid Films
StatePublished - Oct 31 2019

ASJC Scopus subject areas

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

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