μEDM Machining of ZrB2-Based Ceramics Reinforced with SiC Fibres or Whiskers

Mariangela Quarto*, Giuliano Bissacco, Gianluca D’Urso

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

Abstract

The effects of different reinforcement shapes on stability and repeatability of micro electrical discharge machining were experimentally investigated for Ultra-High Temperature Ceramics based on zirconium diboride (ZrB2) doped by SiC. Two reinforcement shapes, namely SiC short fibres and SiC whiskers were selected in accordance with their potential effects on mechanical properties and oxidation performances. Specific sets of process parameters were defined minimizing the short circuits in order to identify the best combination for different pulse types. The obtained results were then correlated with the energy per single discharge and the discharges occurred for all the combinations of material and pulse type. The pulse characterization was performed by recording pulses data by means of an oscilloscope, while the surface characteristics were defined by a 3D reconstruction. The results indicated how reinforcement shapes affect the energy efficiency of the process and change the surface aspect.
Original languageEnglish
Title of host publicationSelected Topics in Manufacturing. Lecture Notes in Mechanical Engineering.
EditorsE. Ceretti, T. Tolio
Place of PublicationCham
PublisherSpringer
Publication date2021
Pages61-74
ISBN (Print)978-3-030-57728-5
ISBN (Electronic)978-3-030-57729-2
DOIs
Publication statusPublished - 2021
SeriesLecture Notes in Mechanical Engineering
ISSN2195-4356

Keywords

  • Micro-EDM
  • UHTCs
  • Ultra High Temperature Ceramics
  • Machinability

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