Mechanisms of micro-groove formation on single-crystal diamond by a nanosecond pulsed laser

Nozomi Takayama, Jiwang Yan

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Micro-grooves were machined onto a single-crystal diamond surface by laser irradiation with a nanosecond pulse, and the resulting damage was investigated. The causes of four different forms of damage have been identified and examined; cracking, ripple formation, groove shape deformation and debris deposition. Cracking is caused by a rapid temperature change; ripples by interference of the laser reflected from the groove walls; groove shape deformation by enhanced absorption of the laser-induced plasma; deposited ablation debris by two different ablation regimes. Cracking and shape deformation is reduced at the center of the groove, which is very smooth and ripple-free for line irradiations using a single pass. These results provide useful information for reducing the laser-induced damage in diamond and creating damage-free micro-grooved diamond cutting tools.

Original languageEnglish
Pages (from-to)299-311
Number of pages13
JournalJournal of Materials Processing Technology
Volume243
DOIs
Publication statusPublished - 2017 May 1

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Keywords

  • Groove formation
  • Laser processing
  • Micromachining
  • Nd:YAG laser
  • Single-crystal diamond
  • Surface microstructure
  • Thermal ablation

ASJC Scopus subject areas

  • Ceramics and Composites
  • Modelling and Simulation
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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