Metal sphere migration in glass by surface heating using CO2 laser

Metal sphere migration in glass by surface heating using CO2 laser
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使用 CO2 激光进行表面加热的金属球在玻璃中的迁移

DOI:
10.1016/j.precisioneng.2021.10.003
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发表时间:
2022
期刊:
Precision Engineering
影响因子:
--
通讯作者:
Morita Noboru
Morita Noboru
中科院分区:
--
文献类型:
--
作者:
Sawafuji Arata;Hidai Hirofumi;Matsusaka Souta;Chiba Akira;Morita Noboru

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源自温度梯度的界面张力梯度导致颗粒迁移。此前,作者报道了使用近红外(NIR)激光操纵玻璃中的金属球。近红外激光束没有被玻璃吸收,而是被金属球吸收,导致金属球升温。周围玻璃的局部软化使得金属球发生迁移。驱动力可以用温度分布引起的界面梯度来解释。在这项研究中,研究了表面加热驱动的金属球迁移。由于使用 CO2 激光进行表面加热,位于表面附近的金属球向表面迁移,并最终离开玻璃。使用电荷耦合器件相机观察到这种现象。数值计算表明,金属球的温度为 2760 K,受照射和未受照射的金属球表面之间的温差为 70 K。计算出的驱动力为 73 nN。结果证实玻璃表面加热引起温度分布和金属球迁移。
The interfacial tension gradient originating from a temperature gradient causes particle migration. Previously, the authors reported the manipulation of a metal sphere in a glass using a near-infrared (NIR) laser. The NIR laser beam was not absorbed by the glass but by the metal sphere, causing the metal sphere to heat up. The local softening of the surrounding glass enabled metal sphere migration. The driving force was explained in terms of an interfacial gradient induced by the temperature distribution. In this study, metal sphere migration driven by surface heating was investigated. A metal sphere located near a surface migrated toward the surface owing to surface heating using a CO2laser and finally exited the glass. This phenomenon was observed using a charge-coupled device camera. A numerical calculation showed that the temperature at the metal sphere was 2760 K, and the temperature difference between the illuminated and non-illuminated metal sphere surfaces was 70 K. The driving force was calculated as 73 nN. The results confirmed that the glass surface heating caused the temperature distribution and the metal sphere migration.
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