Aluminum particle production on alumina rod surface by continuous-wave laser ablation
Aluminum particle production on alumina rod surface by continuous-wave laser ablation
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DOI：
10.1016/j.matchemphys.2021.125557
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发表时间：
2021-12
影响因子：
4.6
通讯作者：
Seiya Tanaka;Naoki Tanaka;K. Komurasaki;R. Kawashima;H. Koizumi
中科院分区：
文献类型：
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作者：
Seiya Tanaka;Naoki Tanaka;K. Komurasaki;R. Kawashima;H. Koizumi
连续波激光烧蚀已被应用于氧化铝还原，最终目的是利用月球资源。激光烧蚀后的氧化铝棒表面有铝颗粒存在。杂质析出被认为是铝粉的产生机理。利用扫描电子显微镜和双色法对激光烧蚀后氧化铝棒表面的铝颗粒分布和温度进行了测量。激光功率影响铝粉颗粒的分布。铝颗粒平均半径变化范围为0.11~1.7xμm，最小值与铝异质形核的临界半径基本一致。表面温度的时间历程与激光功率无关。因此，铝颗粒的产量预计会随着氧气的缺乏而变化，并随着激光功率的增加而增加。所得到的生产铝粉的条件适用于激光烧蚀氧化铝还原法制铝收集系统：板温oft=0.933~2300kK，冷却速度600~800kK/S。
Continuous-wave laser ablation has been applied to alumina reduction with the eventual goal of lunar resource utilization. Aluminum particles were detected on the alumina rod surface after laser ablation. Impurity precipitation has been proposed as the aluminum particle production mechanism. For this study, distributions of aluminum particles and temperatures after laser ablation on an alumina rod surface were measured using SEM and two-color method. Laser power affected the aluminum particle distribution. The mean aluminum particle radius varied: 0.11–1.7 μm. The minimum value was consistent with the critical radius for aluminum nucleation in heterogeneous nucleation. The time history of surface temperatures was found to be independent of laser power. Therefore, aluminum particle production is expected to change with oxygen deficiency, and to increase with laser power. The obtained condition for aluminum particle production is applicable for an aluminum collection system in the alumina reduction method using laser ablation: the plate temperature ofT= 933–2300 K and the cooling rate of 600–800 K/s.