Sintered diamond as a hybrid EDM and grinding tool for the micromachining of single-crystal SiC

Jiwang Yan, Tsong Han Tan

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Sintered diamond was used as a hybrid tool for micro-scale electrical discharge machining (EDM) and grinding of single-crystal SiC to achieve both high efficiency and surface integrity. Material removal behavior, surface topography, and subsurface damage for both process steps were investigated under various conditions. The results showed that SiC decomposed into Si and C during EDM, creating a very thick recast layer which had remarkably lower hardness than the bulk. Owing to the electrical dressing effect in EDM, diamond grains protrude out of tool surface and grind the recast layer in a ductile manner with low tool wear. An extremely smooth surface (R<inf>a</inf> = 1.85 nm) was obtained.

Original languageEnglish
Pages (from-to)221-224
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Volume64
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

  • Electrical discharge machining
  • Grinding
  • Sintered diamond

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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