Diamond-based superhard composites: new synthesis approaches and application prospects

V.P. Filonenko^a, I.P. Zibrov^a, A.S. Anokhin^b, E.V. Kukueva^c
^aVereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Kaluzhskoe shosse 14, Troitsk, Moscow, 108840, Russian Federation
^bBaikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russian Federation
^cNational Research Centre ‘Kurchatov Institute’, pl. Akademika Kurchatova 1, Moscow, 123182, Russian Federation

The paper discusses experimental results on high-temperature and high-pressure (HPHT) synthesis of diamond-like cubic boron nitride (cBN) and diamond with a high concentration of point defects. The presence of active fluids allows to obtain cBN with a carbon content up to 10%. The concentration of boron in the diamond lattice is about 2%, and that of vacancies is two times higher. The concentration and positions of substitution atoms were determined by the Rietveld refinement method. Diamond micropowder reactive sintering with fluid phases was used to synthesize new superhard composites. The microstructure and grain boundaries were investigated by transmission and scanning electron microscopy. Tests of the wear resistance of the new diamond-cBN composites demonstrated that these materials offer good prospects for various applications.

Keywords: diamond, boron nitride, superhard composites, high pressure, sintering, point defects, X-ray analysis, electron microscopy
PACS: 81.10.−h, 89.20.Bb (all)
DOI: 10.3367/UFNe.2018.04.038403
URL: https://ufn.ru/en/articles/2019/2/h/
Web of Science

000466030200008
Scopus

2-s2.0-85067816091
ADS NASA

2019PhyU...62..207F
Citation: Filonenko V P, Zibrov I P, Anokhin A S, Kukueva E V "Diamond-based superhard composites: new synthesis approaches and application prospects" Phys. Usp. 62 207–212 (2019)

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Received: 1st, August 2018, accepted: 25th, April 2018

Оригинал: Филоненко В П, Зибров И П, Анохин А С, Кукуева Е В «Сверхтвёрдые композиты на основе алмаза: новые подходы в синтезе и перспективы применения» УФН 189 217–222 (2019); DOI: 10.3367/UFNr.2018.04.038403

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