Diamond growth in turbulent oxygen-acetylene flames
Diamond growth in turbulent oxygen-acetylene flames
复制标题
金刚石在氧-乙炔湍流火焰中生长
DOI：
10.1063/1.354982
复制
发表时间：
1993
影响因子：
3.2
通讯作者：
J. Freitas
中科院分区：
文献类型：
--
作者：
K. Snail;R. Vardiman;J. Estrera;J. Glesener;C. Merzbacher;C. Craigie;C. M. Marks;R. Glosser;J. Freitas
用湍流预混氧-乙炔火焰在500~1300 °C温度范围内在钼衬底上合成了多晶金刚石薄膜，在1200~1300 °C温度范围内在毫米级天然金刚石衬底上合成了刻面单晶。湍流是通过增大火炬的喷口直径和/或流速来实现的；通过观察火焰形状的变化、测量火焰的噪声谱和计算雷诺数来证实湍流的存在。并将几种金刚石生长湍流火焰的光谱与层流火焰的光谱进行了比较。用拉曼光谱、扫描和透射电子显微镜、红外光谱和光致发光光谱中的一种或多种技术研究了金刚石质量随温度和氧乙炔流量比的变化。观察到在600-1100 °C的钼衬底上生长的晶体是透明的。
Turbulent premixed oxygen‐acetylene flames have been used to synthesize polycrystalline diamond films on molybdenum substrates at temperatures ranging from 500 to 1300 °C and facetted single crystals on mm‐sized natural diamond substrates at temperatures of 1200–1300 °C. Turbulence was achieved by increasing the torch’s orifice diameter and/or the flow velocity; the presence of turbulence was confirmed by observations of changes in the flame shape, measurements of the flame’s noise spectrum, and calculations of the Reynolds number. The optical emission spectra of several diamond‐growing turbulent flames were also compared to the spectra of laminar flames. The variation in diamond quality with temperature and oxygen acetylene flow ratio was studied with one or more of the following techniques: Raman spectroscopy, scanning and transmission electron microscopy, infrared spectroscopy, and photoluminescence spectroscopy. Crystals grown on molybdenum at temperatures of 600–1100 °C were observed to be transparen...