Characterization of scandate cathode at different stages of processing

Xiaotao Liu; Tyler Maxwell; Qunfei Zhou; Matthew J. Beck; T. John Balk; Bernard Vancil

doi:10.1109/IVEC.2018.8391633

Characterization of scandate cathode at different stages of processing

Xiaotao Liu, Tyler Maxwell, Qunfei Zhou, Matthew J. Beck, T. John Balk, Bernard Vancil

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

Abstract

Characterization was performed on samples representing scandate cathodes at key stages of processing. This included the starting powders, sintered pellets, impregnated pellets and activated cathodes, with special emphasis on the impregnated state. It was observed that pores were occupied by scandia after the pressing and sintering stage, and were subsequently completely filled after the impregnation stage. Interestingly, streaks of scandium-containing phases were observed in the impregnated sample. Activated cathodes did not exhibit the expected morphology with highly faceted tungsten, which may be due to a high oxygen content that originated from the powder preparation process.

Original language	English
Title of host publication	2018 IEEE International Vacuum Electronics Conference, IVEC 2018
Pages	233-234
Number of pages	2
ISBN (Electronic)	9781538604540
DOIs	https://doi.org/10.1109/IVEC.2018.8391633
State	Published - Jun 20 2018
Event	19th IEEE International Vacuum Electronics Conference, IVEC 2018 - Monterey, United States Duration: Apr 23 2018 → Apr 26 2018

Publication series

Name	2018 IEEE International Vacuum Electronics Conference, IVEC 2018

Conference

Conference	19th IEEE International Vacuum Electronics Conference, IVEC 2018
Country/Territory	United States
City	Monterey
Period	4/23/18 → 4/26/18

Bibliographical note

Funding Information:
This work was financially supported by the Defense Advanced Research Projects Agency (DARPA) Innovative Vacuum Electronics Science and Technology (INVEST) program, under grant number N66001-16-1-4041.

Publisher Copyright:
© 2018 IEEE.

Keywords

oxygen
processing
scandate cathode
scandia
surface energy

ASJC Scopus subject areas

Electrical and Electronic Engineering
Instrumentation

Access to Document

10.1109/IVEC.2018.8391633

Cite this

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title = "Characterization of scandate cathode at different stages of processing",

abstract = "Characterization was performed on samples representing scandate cathodes at key stages of processing. This included the starting powders, sintered pellets, impregnated pellets and activated cathodes, with special emphasis on the impregnated state. It was observed that pores were occupied by scandia after the pressing and sintering stage, and were subsequently completely filled after the impregnation stage. Interestingly, streaks of scandium-containing phases were observed in the impregnated sample. Activated cathodes did not exhibit the expected morphology with highly faceted tungsten, which may be due to a high oxygen content that originated from the powder preparation process.",

keywords = "oxygen, processing, scandate cathode, scandia, surface energy",

author = "Xiaotao Liu and Tyler Maxwell and Qunfei Zhou and Beck, {Matthew J.} and {John Balk}, T. and Bernard Vancil",

note = "Funding Information: This work was financially supported by the Defense Advanced Research Projects Agency (DARPA) Innovative Vacuum Electronics Science and Technology (INVEST) program, under grant number N66001-16-1-4041. Publisher Copyright: {\textcopyright} 2018 IEEE.; null ; Conference date: 23-04-2018 Through 26-04-2018",

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doi = "10.1109/IVEC.2018.8391633",

language = "English",

series = "2018 IEEE International Vacuum Electronics Conference, IVEC 2018",

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Liu, X, Maxwell, T, Zhou, Q, Beck, MJ , John Balk, T & Vancil, B 2018, Characterization of scandate cathode at different stages of processing. in 2018 IEEE International Vacuum Electronics Conference, IVEC 2018. 2018 IEEE International Vacuum Electronics Conference, IVEC 2018, pp. 233-234, 19th IEEE International Vacuum Electronics Conference, IVEC 2018, Monterey, United States, 4/23/18. https://doi.org/10.1109/IVEC.2018.8391633

Characterization of scandate cathode at different stages of processing. / Liu, Xiaotao; Maxwell, Tyler; Zhou, Qunfei et al.

2018 IEEE International Vacuum Electronics Conference, IVEC 2018. 2018. p. 233-234 (2018 IEEE International Vacuum Electronics Conference, IVEC 2018).

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

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AU - Liu, Xiaotao

AU - Maxwell, Tyler

AU - Zhou, Qunfei

AU - Beck, Matthew J.

AU - John Balk, T.

AU - Vancil, Bernard

N1 - Funding Information: This work was financially supported by the Defense Advanced Research Projects Agency (DARPA) Innovative Vacuum Electronics Science and Technology (INVEST) program, under grant number N66001-16-1-4041. Publisher Copyright: © 2018 IEEE.

PY - 2018/6/20

Y1 - 2018/6/20

N2 - Characterization was performed on samples representing scandate cathodes at key stages of processing. This included the starting powders, sintered pellets, impregnated pellets and activated cathodes, with special emphasis on the impregnated state. It was observed that pores were occupied by scandia after the pressing and sintering stage, and were subsequently completely filled after the impregnation stage. Interestingly, streaks of scandium-containing phases were observed in the impregnated sample. Activated cathodes did not exhibit the expected morphology with highly faceted tungsten, which may be due to a high oxygen content that originated from the powder preparation process.

AB - Characterization was performed on samples representing scandate cathodes at key stages of processing. This included the starting powders, sintered pellets, impregnated pellets and activated cathodes, with special emphasis on the impregnated state. It was observed that pores were occupied by scandia after the pressing and sintering stage, and were subsequently completely filled after the impregnation stage. Interestingly, streaks of scandium-containing phases were observed in the impregnated sample. Activated cathodes did not exhibit the expected morphology with highly faceted tungsten, which may be due to a high oxygen content that originated from the powder preparation process.

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KW - surface energy

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Characterization of scandate cathode at different stages of processing

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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