PHASE COMPOSITION AND SURFACE STRUCTURE OF A PHOTOCATHODE BASED ON CeIr5 INTERMETALLIC COMPOUND

10.25712/ASTU.1811-1416.2023.03.009

Authors

  • Alexey G. Nikiforov I.I. Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul, 656038, Russia
  • Boris F. Dem’yanov I.I. Polzunov Altai State Technical University, Lenin Pr., 46, Barnaul, 656038, Russia
  • Danila A. Nikiforov Budker Institute of Nuclear Physics SB RAS, Acad. Lavrentieva Pr., 11, Novosibirsk, 630090, Russia https://orcid.org/0000-0002-6034-5778
  • Alexey E. Levichev Budker Institute of Nuclear Physics SB RAS, Acad. Lavrentieva Pr., 11, Novosibirsk, 630090, Russia
  • Sergey L. Mikerin Institute of Automation and Electrometry SB RAS, Acad. Koptyug Pr., 1, Novosibirsk, 630090, Russia https://orcid.org/0000-0001-5049-8570
  • Andrey E. Simanchuk Institute of Automation and Electrometry SB RAS, Acad. Koptyug Pr., 1, Novosibirsk, 630090, Russia

Keywords:

photocathode, iridium-cerium alloy, CeIr5 phase, eutectic, X-ray phase analysis

Abstract

In this work, we studied the phase composition and structure of an Ir-16.7 at. % Ce alloy with CeIr5 stoichiometry. Using X-ray phase analysis, it was found that the alloy is not single-phase, it contains three phases in significant amounts – CeIr5, Ir and Ce2Ir7. The alloy has a polycrystalline structure; the grains consist of a highly dispersed eutectic mixture of two CeIr5 + Ir phases. The CeIr5 intermetallic compound forms a matrix in which        Ir crystals are included. Ir crystals are globular and needle-shaped. The characteristic size of globular crystals is       1-3 µm, the diameter of needle-like crystals is 0.5-1.0 µm. When the needle reaches the surface of the photocathode, Ir form a columnar structure with a radius of curvature of about 400 nm and a density of ρ = 33·104 mm-2. Dispersion of the structure provides a high density of interphase boundaries. The estimate shows that on a surface with an area of 1 mm2, the length of the network of interphase boundaries is 0.83 m.

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Published

2023-09-30

How to Cite

Nikiforov А. Г. ., Dem’yanov Б. Ф. ., Nikiforov Д. А. ., Levichev А. Е. ., Mikerin С. Л. ., & Simanchuk А. Э. . (2023). PHASE COMPOSITION AND SURFACE STRUCTURE OF A PHOTOCATHODE BASED ON CeIr5 INTERMETALLIC COMPOUND: 10.25712/ASTU.1811-1416.2023.03.009. Fundamental’nye Problemy Sovremennogo Materialovedenia / Basic Problems of Material Science, 20(3), 365–371. Retrieved from http://ojs.altstu.ru/index.php/fpsm/article/view/563

Issue

Vol. 20 No. 3 (2023): Fundamental’nye problemy sovremennogo materialovedenia (Basic Problems of Material Science (BPMS))

Section

SECTION 1. CONDENSED MATTER PHYSICS