Anomalous behavior of hardness and crystal structure in CeRh3Bx (x = 0-1) phase

Kunio Yubuta, A. Nomura, Tomoo Yamamura, T. Shishido

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We have examined the relationship between hardness and crystal structure of a Cu3Au-type compound CeRh3Bx (x = 0-1) by electron diffraction and high-resolution electron microscopy. The electron diffraction revealed 1/2 1/2 1/2-type superlattice reflections and fine satellite ones in B content range of 0.4 < x < 0.5, where anomalous decrease of hardness was observed. The observed high-resolution image taken with a diffraction pattern showing the satellite reflections along the [0 1 1] direction shows a domain structure with size of about 3 nm, and a lattice modulation and some edge dislocations have been observed at boundaries between the domains. Conclusively, ordering of B atoms and followed by the appearance of the long-ranged modulated structure could lead to the anomalous behavior of hardness in CeRh3Bx.

Original languageEnglish
Pages (from-to)301-304
Number of pages4
JournalJournal of Alloys and Compounds
Volume451
Issue number1-2
DOIs
Publication statusPublished - 2008 Feb 28

Keywords

  • Boron nonstoichiometry
  • Crystal structure
  • Domain structure
  • Electron diffraction
  • Hardness
  • High-resolution image

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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