Defect-impurity composition of diamond crystals grown in magnesium-carbon system

Authors

  • Татьяна Викторовна Коваленко Institute for Superhard Materials NAS of Ukraine Avtozavodskaya Str., 2a, Kyiv, Ukraine, 04074, Ukraine https://orcid.org/0000-0003-4878-5161
  • Сергей Алексеевич Ивахненко Institute for Superhard Materials NAS of Ukraine Avtozavodskaya Str., 2a, Kyiv, Ukraine, 04074, Ukraine https://orcid.org/0000-0001-9243-9982
  • Александр Михайлович Куцай Institute for Superhard Materials NAS of Ukraine Avtozavodskaya Str., 2a, Kyiv, Ukraine, 04074, Ukraine https://orcid.org/0000-0002-4210-4946

DOI:

https://doi.org/10.15587/1729-4061.2015.43402

Keywords:

diamond single crystals, magnesium-based system, boron, B-N complexes, uncompensated boron, IR spectroscopy

Abstract

In the Mg-C system at p ≤ 8,2 GPa and Т» 1800-2000°C, structurally perfect IIa + IIb type diamond single crystals were obtained, and the peculiarities of their defect-impurity composition were considered. Grown diamonds were studied using IR spectroscopy. As a result of the research, it was found that in this system, it is possible to obtain diamonds with low nitrogen impurity concentration due to limiting its receipt to the crystallization front owing to forming the Mg3N2 nitride at high pressures and temperatures. It was revealed that in the grown diamond crystals, the boron impurity is present in various forms: B-N complexes (D-centers) with a characteristic absorption band at 1290 cm-1 and uncompensated (single) boron (characteristic absorption bands - 2460, 2810 and 2920 cm-1).

Author Biographies

Татьяна Викторовна Коваленко, Institute for Superhard Materials NAS of Ukraine Avtozavodskaya Str., 2a, Kyiv, Ukraine, 04074

Junior Researcher

Department of crystallization kinetics of superhard materials single crystals 

Сергей Алексеевич Ивахненко, Institute for Superhard Materials NAS of Ukraine Avtozavodskaya Str., 2a, Kyiv, Ukraine, 04074

Corresponding Member of the National Academy of Sciences of Ukraine, doctor of technical sciences, professor

Department of crystallization kinetics of superhard materials single crystals 

Александр Михайлович Куцай, Institute for Superhard Materials NAS of Ukraine Avtozavodskaya Str., 2a, Kyiv, Ukraine, 04074

PhD, Senior Researcher

Laboratory of nanostructured and crystallographic studies 

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Published

2015-06-24

How to Cite

Коваленко, Т. В., Ивахненко, С. А., & Куцай, А. М. (2015). Defect-impurity composition of diamond crystals grown in magnesium-carbon system. Eastern-European Journal of Enterprise Technologies, 3(11(75), 39–42. https://doi.org/10.15587/1729-4061.2015.43402

Issue

Vol. 3 No. 11(75) (2015): Materials Science

Section

Materials Science

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Copyright (c) 2015 Татьяна Викторовна Коваленко, Сергей Алексеевич Ивахненко, Александр Михайлович Куцай

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