High temperature flexural strength in monolithic boron carbide ceramic obtained from two different raw powders by spark plasma sintering

Oleg Vasylkiv, Dmytro Demirskyi, Hanna Borodianska, Yoshio Sakka, Petre Badica

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

High density monolithic boron carbide specimens with grain size of 35 μm were consolidated by spark plasma sintering using identical heating conditions and Ar or N2 atmospheres. The effect of impurities from two different raw powders on the flexural strength was revealed. The increase in flexural strength was observed up to 1600°C. Specimens consolidated in nitrogen had a higher strength than that consolidated in argon. Samples had the room temperature strength ranging from 350 to 550 MPa. The high temperature strength of our samples exceeding 400MPa is higher than that previously reported for polycrystalline monolithic B4C. The supporting cracking/strengthening mechanism was discussed and proposed.

Original languageEnglish
Pages (from-to)587-592
Number of pages6
JournalJournal of the Ceramic Society of Japan
Volume124
Issue number5
DOIs
Publication statusPublished - 2016 May
Externally publishedYes

Keywords

  • B4C
  • Flexural strength
  • Spark plasma sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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