Evolution of the Microstructure and Mechanical Properties of cBN-Based Cutting Tools with Silicides Compounds as Binder Phase

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

Silicide based compounds are widely used for coatings due to their high melting temperature, oxidation resistance and moderate density. Employment of binders based on silicides of transitional metals can provide cBN-based cutting tools with higher chemical stability and better performance. The relationship between phase composition, microstructure and mechanical properties of novel polycrystalline cubic boron nitride (PcBN) materials were investigated. Three series of PcBN samples were made by high pressure high temperature (HPHT) sintering. Silicides of chromium-CrSi2, vanadium-VSi2 and molybdenum MoSi2 were used as a binder phase in each case, while aluminum was introduced to the mixture as an oxygen getter. During HPHT sintering at temperatures above 1850 C the formation of borides of binder phase were observed in cases with VSi2 and MoSi2. For system with CrSi2 binder, temperature of boride formation was found to be lower-1600 C. Materials with MoSi2 binder phase demonstrated the highest level of microhardness. Performance of materials were investigated in conditions of machining of stainless steel AISI 316L and Inconel 718.

Details

Authors
Organisations
External organisations
  • Taras Shevchenko National University of Kyiv
  • V.N. Bakul Institute for Superhard Materials of National Academy of Sciences of Ukraine
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Applied Mechanics

Keywords

  • cBN, chromium, microstructure, PcBN, silicide, vanadium
Original languageEnglish
Title of host publicationSPS2020 - Proceedings of the Swedish Production Symposium
EditorsKristina Safsten, Fredrik Elgh
PublisherIOS Press
Pages428-438
Number of pages11
ISBN (Electronic)9781614994398
Publication statusPublished - 2020 Oct 12
Publication categoryResearch
Peer-reviewedYes
Event9th Swedish Production Symposium, SPS 2020 - Virtual, Online, Sweden
Duration: 2020 Oct 72020 Oct 8

Publication series

NameAdvances in Transdisciplinary Engineering
Volume13

Conference

Conference9th Swedish Production Symposium, SPS 2020
CountrySweden
CityVirtual, Online
Period2020/10/072020/10/08