Merchan-Merchan Wilson, Saveliev Alexei V, Taylor Aaron M
School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019, USA.
Micron. 2009 Dec;40(8):821-6. doi: 10.1016/j.micron.2009.07.002. Epub 2009 Jul 25.
The growth and morphological evolution of molybdenum-oxide microstructures formed in the high temperature environment of a counter-flow oxy-fuel flame using molybdenum probes is studied. Experiments conducted using various probe retention times show the sequence of the morphological changes. The morphological row begins with micron size objects exhibiting polygonal cubic shape, develops into elongated channels, changes to large structures with leaf-like shape, and ends in dendritic structures. Time of probe-flame interaction is found to be a governing parameter controlling the wide variety of morphological patterns; a molecular level growth mechanism is attributed to their development. This study reveals that the structures are grown in several consecutive stages: material "evaporation and transportation", "transformation", "nucleation", "initial growth", "intermediate growth", and "final growth". XRD analysis shows that the chemical compositions of all structures correspond to MoO(2).
研究了使用钼探针在逆流氧燃料火焰的高温环境中形成的氧化钼微结构的生长和形态演变。使用各种探针保留时间进行的实验显示了形态变化的顺序。形态序列开始于呈现多边形立方形状的微米级物体，发展为细长通道，变为叶状的大型结构，最终形成树枝状结构。发现探针与火焰相互作用的时间是控制各种形态模式的关键参数；其发展归因于分子水平的生长机制。这项研究表明，这些结构是在几个连续阶段生长的：材料“蒸发与传输”、“转变”、“成核”、“初始生长”、“中间生长”和“最终生长”。XRD分析表明，所有结构的化学成分均对应于MoO(2)。
