Method for determining particle velocity during aerosol deposition by impact pressure of the particles

Method for determining particle velocity during aerosol deposition by impact pressure of the particles
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通过颗粒的冲击压力确定气溶胶沉积过程中颗粒速度的方法

DOI:
10.1016/j.surfcoat.2022.128616
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发表时间:
2022
影响因子:
5.4
通讯作者:
Makoto Hasegawa
Makoto Hasegawa
中科院分区:
材料科学1区
文献类型:
--
作者:
Yuki Furuya;Makoto Tanaka;Satoshi Kitaoka;Makoto Hasegawa

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了解通过气溶胶沉积的涂层需要了解与基材碰撞的颗粒的动能。在本研究中,α-Al 2 O3粒子在He或N2载气中的速度是由衬底上的最大冲击压力通过Rankine-Hugoniot关系推导出来的,称为冲击压力法。使用压敏膜测量冲击压力分布以提供二维颗粒速度。从压力分布可以看出,颗粒在气流中从喷嘴中心和从喷嘴边缘附近具有几乎相同的撞击速度。需要一个校正因子来确定压敏膜的正确冲击压力。基于克努森数和测量的冲击压力确定的校正因子在1.9和4.0之间的范围内。
Understanding coating by aerosol deposition requires knowledge of the kinetic energy of particles colliding with the substrate. In this study, the velocity of α-Al2O3particles in a He or N2carrier gas was derived from the maximum impact pressure on the substrate by the Rankine–Hugoniot relations, referred to as the impact-pressure method. The impact pressure distribution was measured using a pressure-sensitive film to provide the two-dimensional particle velocity. From the pressure distribution, it was found that the particle in the gas flow from the center of the nozzle and from near the edge of the nozzle have almost the same impact velocity. A correction factor was required to determine the correct impact pressure from the pressure-sensitive film. The correction factor, determined based on the Knudsen number and the measured impact pressure, was in the range between 1.9 and 4.0.
DOI: 10.2472/jsms.47.20
发表时间: 1998
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