Phase Composition and Structure of the Ce-83.3 at%Ir Alloy Obtained by Electron Beam Melting

УДК 669.018

  • A.G. Nikiforov Polzunov Altai State Technical University (Barnaul, Russia) Email: alexnik0113@mail.ru
  • B.F. Demyanov Polzunov Altai State Technical University (Barnaul, Russia) Email: bfdemyanov@mail.ru
  • D.A. Nikiforov Budker Institute of Nuclear Physics SB RAS (Novosibirsk, Russia) Email: nikdanila@bk.ru
  • А.Е. Levichev Budker Institute of Nuclear Physics SB RAS (Novosibirsk, Russia) Email: a.levichev@g.nsu.ru
  • S.L. Mikerin Institute of Automation and Electrometry SB RAS (Novosibirsk, Russia) Email: mikerinsl@iae.sbras.ru
  • A.S. Kuchyanov Institute of Automation and Electrometry SB RAS (Novosibirsk, Russia) Email: aleks@iae.nsk.su
  • M.A. Gurev Polzunov Altai State Technical University (Barnaul, Russia) Email: gurievma@mail.ru
  • L.N. Ageikova Polzunov Altai State Technical University (Barnaul, Russia) Email: ageikova@mail.ru
Keywords: photocathode, iridium cerium alloy, CeIr5 phase, eutectic, x-ray phase analysis

Abstract

Photocathodes made of the Ir-Ce system alloys have high thermal resistance, electrical, and thermal conductivity along with high electron emission properties and are widely used as sources of electrons. In this paper, the phase composition and structure of the Ce-83,3ат%Ir alloy intended for use as a photocathode material are studied. The alloy obtained by electron beam melting has a component ratio corresponding to the CeIr5 intermetallic compound. Despite this, a dispersed multiphase material is formed during crystallization. X-ray phase analysis shows the presence of three phases, such as Ir, CeIr5, and Ce2Ir7, in the photocathode material. Optical microscopy studies of the photocathode microstructure reveal that the basis of the alloy is the CeIr5 + Ir eutectic. The CeIr5 phase forms a matrix in which Ir crystals are included. The Ir phase has the form of rods with an average diameter of 0.7 microns. The high dispersion of the structure can increase the emission properties of the photocathode.

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Author Biographies

A.G. Nikiforov, Polzunov Altai State Technical University (Barnaul, Russia)

кандидат физико-математических наук, доцент, доцент кафедры современных специальных материалов

B.F. Demyanov, Polzunov Altai State Technical University (Barnaul, Russia)

доктор физико-математических наук, профессор, профессор кафедры физики

D.A. Nikiforov, Budker Institute of Nuclear Physics SB RAS (Novosibirsk, Russia)

научный сотрудник

А.Е. Levichev, Budker Institute of Nuclear Physics SB RAS (Novosibirsk, Russia)

кандидат физико-математических наук, старший научный сотрудник Лаборатории физики лазеров, заведующий лабораторией

S.L. Mikerin, Institute of Automation and Electrometry SB RAS (Novosibirsk, Russia)

кандидат физико-математических наук, старший научный сотрудник Лаборатория физики лазеров, заведующий лабораторией

A.S. Kuchyanov, Institute of Automation and Electrometry SB RAS (Novosibirsk, Russia)

кандидат физико-математических наук, старший научный сотрудник

M.A. Gurev, Polzunov Altai State Technical University (Barnaul, Russia)

кандидат технических наук, доцент кафедры машино-строительных технологий и оборудования

L.N. Ageikova, Polzunov Altai State Technical University (Barnaul, Russia)

кандидат физико-математических наук, доцент кафедры физики

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Published
2022-03-18
How to Cite
Nikiforov A., Demyanov B., Nikiforov D., LevichevА., Mikerin S., Kuchyanov A., Gurev M., Ageikova L. Phase Composition and Structure of the Ce-83.3 at%Ir Alloy Obtained by Electron Beam Melting // Izvestiya of Altai State University, 2022, № 1(123). P. 51-56 DOI: 10.14258/izvasu(2022)1-07. URL: http://izvestiya.asu.ru/article/view/%282022%291-07.