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Refractories and Industrial Ceramics

, Volume 59, Issue 5, pp 528–533 | Cite as

Combined Synthesis of Heterogeneous Powders in CaB6–TiB2 System

  • D. D. NesmelovEmail author
  • A. S. Lysenkov
  • D. P. Danilovich
  • T. V. Kotsar
  • S. S. Ordan’yan
Article
  • 7 Downloads

The heterogeneous CaB6–TiB2 powder mixtures were synthesized by reducing the mixture of TiO2 and CaCO3 with boron carbide in vacuum at 1400 – 1650°C. Reaction hot pressing was conducted according to the following regime: 1500°C (synthesis in vacuum) – 1900°C (pressing in Ar). As a result of synthesizing CaB6–TiB2 at mass ratio of 1:1 and 1600°C followed by isothermal soaking for 1 hour, a heterogeneous mixture was obtained containing crystalline phases of CaB6 and TiB2 with the residual B4C impurity (0.5 wt. %). The powder particles represent grains measuring 1 – 3 μm in diameter and containing two phases CaB6 and TiB2 in the form of crystallites measuring 0.1 – 1.0 μm in diameter uniformly distributed throughout the particle volume.

Keywords

calcium hexaboride CaB6 titanium diboride TiB2 combined synthesis boron carbide B4heterogeneous powder 

Notes

This study was performed within the scope of the Russian Foundation for Basic Research (RFBR) projects Nos. 17-03-00863 and 18-33-01281 with the use of equipment of the St. Petersburg GTI (TU) Engineering Center.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • D. D. Nesmelov
    • 1
    Email author
  • A. S. Lysenkov
    • 2
  • D. P. Danilovich
    • 1
  • T. V. Kotsar
    • 1
  • S. S. Ordan’yan
    • 1
  1. 1.Federal State Budgetary Educational Institution of Higher Education “St. Petersburg State Technological Institute (Technical University)St. PetersburgRussia
  2. 2.State Budgetary Institution of Science“A.A. Baikov Institute of Metallurgy and Materials Science”MoscowRussia

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