Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 49, Issue -, Pages 288-291Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2014.10.001
Keywords
Polycrystalline cubic boron nitride; Cubic multi anvil press; Superhard materials; High pressure high temperature
Funding
- Defense Advanced Research Planning Agency [W31P4Q-13-1-0010]
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Polycrystalline cubic boron nitride (PcBN) composites were sintered around 6 GPa/1200 degrees 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 x 12 mm diameter x 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. (C) 2014 Elsevier Ltd. All rights reserved.
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