论文标题
碳弧中从低消融状态过渡到高消融状态的模型
Model of a transition from low to high ablation regime in a carbon arc
论文作者
论文摘要
在存在惰性背景气体的存在下石墨消融在不同的方法中用于合成碳纳米管的合成，包括电弧和激光/太阳能消融。消融率是合成过程的重要特征。从多个弧实验中知道，有两个可区分的消融方案，即所谓的“低消融”和“高消融”制度，其中消融率随弧参数的变化而差异很大。我们开发了一个模型，该模型通过考虑背景气体的存在及其对消融速率的影响来解释低和高消融方案。我们得出了这些制度的分析关系，并通过将它们与宽的ARC参数范围的完整数值解决方案进行比较来验证它们。我们通过与碳弧中的消融速率进行多个实验数据来全面验证模型，其中各种弧参数变化了。获得了完整的数值解决方案，分析解决方案和实验数据之间的良好定性和定量一致性。
Graphite ablation in a presence of inert background gas is widely used in different methods for the synthesis of carbon nanotubes, including electric arc and laser/solar ablation. The ablation rate is an important characteristic of the synthesis process. It is known from multiple arc experiments that there are two distinguishable ablation regimes, so-called "low ablation" and "high ablation" regimes in which the ablation rate behaves rather differently with variation of the arc parameters. We developed a model that explains low and high ablation regimes by taking into account the presence of a background gas and its effects on the ablation rate. We derive analytical relations for these regimes and verify them by comparing them with full numerical solutions in a wide arc parameter range. We comprehensively validate the model by comparing to multiple experimental data on the ablation rate in carbon arcs, where various arc parameters were varied. Good qualitative and quantitative agreement between full numerical solutions, analytical solutions, and experimental data was obtained.
