Sintering of polycrystalline boron nitride composites for in-situ synchrotron high pressure research

J. Qian, D. Mukhopadhyay, K. D. Nguyen, K. B. Bertagnolli, Y. Ma

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Polycrystalline cubic boron nitride (PcBN) composites were sintered around 6 GPa/1200 °C in a cubic multi anvil press: aluminium in the starting mixture reacts with cubic boron nitride (cBN) and forms aluminium boride (AlB2) and nitride (AlN) bonding among cBN grains during high pressure high temperature (HPHT) sintering. X-ray diffraction (XRD), Scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and Raman spectroscopy were utilized to analyse different phases,micro-structure,morphology, and compositions of the composites material. The dense structure of superhard cBN grains bonded together with light AlB2/AlN offers superior hardness, high strength, and X-ray transparency; PcBN anvils (12 mm height × 12 mm diameter × 5 mm culet) were built for rotational anvil cell for in-situ synchrotron high pressure experiments on Zirconium, and these PcBN anvils survived up to 32 GPa after initial tests.

Original languageEnglish
Pages (from-to)288-291
Number of pages4
JournalInternational Journal of Refractory Metals and Hard Materials
Volume49
Issue number1
DOIs
StatePublished - 2015

Keywords

  • Cubic multi anvil press
  • High pressure high temperature
  • Polycrystalline cubic boron nitride
  • Superhard materials

Fingerprint Dive into the research topics of 'Sintering of polycrystalline boron nitride composites for in-situ synchrotron high pressure research'. Together they form a unique fingerprint.

  • Cite this