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

Daniel Busbaher; Julius Schoop; I. S. Jawahir; T. John Balk

doi:10.1109/IVEC.2015.7223754

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-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 language	English
Title of host publication	Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015
ISBN (Electronic)	9781479971107
DOIs	https://doi.org/10.1109/IVEC.2015.7223754
State	Published - Aug 25 2015
Event	16th IEEE International Vacuum Electronics Conference, IVEC 2015 - Beijing, China Duration: Apr 27 2015 → Apr 29 2015

Publication series

Name	Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015

Conference

Conference	16th IEEE International Vacuum Electronics Conference, IVEC 2015
Country/Territory	China
City	Beijing
Period	4/27/15 → 4/29/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

cryogenic machining
cutting edge radius
dispenser cathode
porous tungsten
surface integrity

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/IVEC.2015.7223754

Cite this

Busbaher, D., Schoop, J., Jawahir, I. S., & Balk, T. J. (2015). Observations on cutting edge radius effects in cryogenic machining of porous tungsten. In Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015 Article 7223754 (Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015). https://doi.org/10.1109/IVEC.2015.7223754

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title = "Observations on cutting edge radius effects in cryogenic machining of porous tungsten",

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.",

keywords = "cryogenic machining, cutting edge radius, dispenser cathode, porous tungsten, surface integrity",

author = "Daniel Busbaher and Julius Schoop and Jawahir, \{I. S.\} and Balk, \{T. John\}",

note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 16th IEEE International Vacuum Electronics Conference, IVEC 2015 ; Conference date: 27-04-2015 Through 29-04-2015",

year = "2015",

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day = "25",

doi = "10.1109/IVEC.2015.7223754",

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Busbaher, D, Schoop, J , Jawahir, IS & Balk, TJ 2015, Observations on cutting edge radius effects in cryogenic machining of porous tungsten. in Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015., 7223754, Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015, 16th IEEE International Vacuum Electronics Conference, IVEC 2015, Beijing, China, 4/27/15. https://doi.org/10.1109/IVEC.2015.7223754

Observations on cutting edge radius effects in cryogenic machining of porous tungsten. / Busbaher, Daniel; Schoop, Julius ; Jawahir, I. S. et al.
Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015. 2015. 7223754 (Proceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Schoop, Julius

AU - Jawahir, I. S.

AU - Balk, T. John

PY - 2015/8/25

Y1 - 2015/8/25

N2 - 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.

AB - 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.

KW - cryogenic machining

KW - cutting edge radius

KW - dispenser cathode

KW - porous tungsten

KW - surface integrity

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

Abstract

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Keywords

ASJC Scopus subject areas

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