Spontaneous Nucleation of Diamond in a Methane–Hydrogen Microwave Plasma on YAG:Ce Particles

IF 0.6 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY
V. S. Sedov, A. K. Martyanov, S. V. Kuznetsov, I. A. Tiazhelov, S. S. Savin, L. V. Tarala, V. I. Konov
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Abstract

The effect of spontaneous nucleation of the diamond phase on cerium-doped yttrium aluminum garnet (YAG:Ce) particles is observed under the action of a microwave plasma in a methane‒hydrogen gas mixture at a substrate temperature of 820°C. These conditions facilitate the process of “chemical vapor deposition (CVD) of diamond” (CVD), but the synthesis of diamond films requires additional procedures to stimulate nucleation. It is shown that YAG:Ce particles can be used as diamond nucleation centers. After the 20-min CVD process, diamond particles of different sizes and a density of ≈106 cm‒2, which is 15‒20% of the deposition density of YAG:Ce particles, are detected by SEM. Luminescence bands from Ce3+ ions (550 nm) and Si-V centers in diamond (738 nm) are detected in the photoluminescence spectra of the synthesized diamond crystallites. The observed effect is interesting for studying the processes of diamond phase growth by the CVD method, especially in the synthesis of diamond composites for the tasks of visualizing high-power X-ray radiation.

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来源期刊
Bulletin of the Lebedev Physics Institute
Bulletin of the Lebedev Physics Institute PHYSICS, MULTIDISCIPLINARY-
CiteScore
0.70
自引率
25.00%
发文量
41
审稿时长
6-12 weeks
期刊介绍: Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.
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