Increased Surface Integrity in Porous Tungsten from Cryogenic Machining with Cermet Cutting Tool

J. Schoop, F. Ambrosy, F. Zanger, V. Schulze, I. S. Jawahir, T. J. Balk

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


In order to eliminate the process of backfilling porous tungsten with a plastic infiltrant during machining to prevent unwanted smearing of surface pores, cryogenic machining is investigated as a viable alternative. Porous tungsten is mainly used in the manufacture of dispenser cathodes where demands for surface quality and dimensional tolerances are extremely high. For these reasons, the ability of cryogenic machining to provide increased surface integrity and tool life compared to conventional dry machining is explored. Moreover, some preliminary results of machining with various cutting edge radii and effects on surface stress state are presented. Overall, cryogenic machining does provide significant surface quality and tool wear improvements over conventional dry machining practices.

Original languageEnglish
Pages (from-to)823-831
Number of pages9
JournalMaterials and Manufacturing Processes
Issue number7
StatePublished - May 18 2016

Bibliographical note

Publisher Copyright:
© Copyright 2016 Taylor & Francis Group, LLC.


  • Cathode
  • Cryogenic machining
  • Porous tungsten
  • Surface integrity

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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