Sintering of cBN Based Materials with a TaC Binder for Cutting Tool Application

Research output: Contribution to journalArticle

Abstract

Abstract: Ceramic matrix composites based on cubic boron nitride with a TaC binder phase are sintered under conditions of high pressure and high temperature. The sintering is carried out in a high-pressure apparatus of the toroid type in the temperature range of 1450–2450°C. It is shown that a chemical reaction between components of the mixture with the formation of TaB2 takes place at a sintering temperature above 2150°C. The microhardness of the composites increases with an increase in the sintering temperature and reaches a maximum value (34 GPa) at 2150°C. The composites show high resistance to mechanochemical wear when used for high-speed machining of nickel-based alloy Inconel 718.

Details

Authors
Organisations
External organisations
  • National Academy of Sciences of Ukraine
  • Taras Shevchenko National University of Kyiv
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Mechanical Engineering
  • Materials Engineering

Keywords

  • boron nitride, high pressure, microhardness, tantalum carbide
Original languageEnglish
Pages (from-to)51-57
Number of pages7
JournalJournal of Superhard Materials
Volume42
Issue number2
Publication statusPublished - 2020 Mar 1
Publication categoryResearch
Peer-reviewedYes