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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引用次数: 0

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.

Abstract Image

甲烷-氢微波等离子体中YAG:Ce粒子上金刚石的自发成核
在甲烷-氢气混合物中,在820℃的微波等离子体作用下,观察了金刚石相自发成核对掺铈钇铝石榴石(YAG:Ce)的影响。这些条件有利于“化学气相沉积(CVD)金刚石”(CVD)的过程,但金刚石薄膜的合成需要额外的程序来刺激成核。结果表明,YAG:Ce颗粒可以作为金刚石的成核中心。CVD工艺20 min后,SEM检测到不同尺寸的金刚石颗粒,密度约为106 cm-2,为YAG:Ce颗粒沉积密度的15-20%。在合成的金刚石晶体的光致发光光谱中检测到Ce3+离子(550 nm)和金刚石中Si-V中心(738 nm)的发光带。观察到的效应对于用CVD方法研究金刚石相生长过程,特别是用于高功率x射线辐射可视化任务的金刚石复合材料的合成具有重要意义。
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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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