Cutting performance and indentation behaviour of diamond films on Co-cemented tungsten carbide

R. Polini*, P. D'Antonio, S. Lo Casto, V. F. Ruisi, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Diamond films were grown by Hot Filament Chemical Vapour Deposition (HFCVD) on differently pretreated ISO-grade K10 cemented carbide (WC-5.8wt.%Co) cutting inserts. Etching with diluted HNO3 and surface roughening by Murakami's reagent were used as substrate pretreatments. The adhesion of the films was evaluated by indentation tests. In order to obtain a reliable estimation of the adhesion by the slope of the crack radius-indentation load curves, a careful SEM measurement of the crack lengths was performed. Bare and diamond-coated cutting inserts were used for turning tests of Al2O3-reinforced aluminum alloy. The adhesion levels obtained from the indentation curves correlated well the lifetime of diamond-coated cutting inserts used in turning tests performed on metal matrix composite material under severe cutting conditions.

Original languageEnglish (US)
Pages (from-to)78-83
Number of pages6
JournalSurface and Coatings Technology
Volume123
Issue number1
DOIs
StatePublished - Jan 10 2000

Keywords

  • Cutting performance
  • Diamond films
  • Indentation behaviour

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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