Fracture mechanisms of ceramic coatings in indentation

D. F. Diao, K. Kato, K. Hokkirigawa

研究成果: Article査読

75 被引用数 (Scopus)

抄録

Indentation tests on ceramic coatings are carried out in this paper and fracture pattern diagrams as a function of normal load and coating thickness are introduced for Al2O3 and TiN coatings deposited on cemented carbide substrates. Ring cracks are observed in indentation with a blunt indenter (1.5 mm radius), while lateral and radial cracks are observed in indentation with a sharp indenter (0.2 mm radius). The mechanisms for generating ring and lateral cracks are analyzed using elastic theory and equations predicting the critical loads for crack generation are introduced. The effective elastic modulus Eeff, is introduced for this analysis as a new elastic parameter for a coated surface. The results show that the theoretically calculated critical loads for crack generation agree well with the experimental ones.

本文言語English
ページ(範囲)860-869
ページ数10
ジャーナルJournal of Tribology
116
4
DOI
出版ステータスPublished - 1994 10

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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