Observations on cutting edge radius effects in cryogenic machining of porous tungsten

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Porous tungsten is a refractory metal commonly used to manufacture dispenser cathode pellets. To produce the required geometric shape of a cathode, precision machining of the emitting surface is necessary. Because dry machining leads to excessive tool wear and smearing of surface pores, a plastic infiltrant is used to both prevent smearing and lubricate the cut. In order to develop a sustainable alternative to this plastic infiltration process, infiltrant-free cryogenic machining of porous tungsten has been identified by previous studies to be capable of producing excellent levels of surface porosity [1-3]. Cryogenic cooling during machining of porous tungsten allows for controlled brittle fracture machining, leading to relatively poor surface roughness [3]. Consequently, improving the surface quality of cryogenically machined porous tungsten surfaces is a necessary condition for the successful implementation of this technology.

Original languageEnglish
Title of host publicationProceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015
ISBN (Electronic)9781479971107
DOIs
StatePublished - Aug 25 2015
Event16th IEEE International Vacuum Electronics Conference, IVEC 2015 - Beijing, China
Duration: Apr 27 2015Apr 29 2015

Publication series

NameProceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015

Conference

Conference16th IEEE International Vacuum Electronics Conference, IVEC 2015
Country/TerritoryChina
CityBeijing
Period4/27/154/29/15

Keywords

  • cryogenic machining
  • cutting edge radius
  • dispenser cathode
  • porous tungsten
  • surface integrity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Observations on cutting edge radius effects in cryogenic machining of porous tungsten'. Together they form a unique fingerprint.

Cite this