Air-bubble entrapment due to a drop

Nao Ootsuka; Takeharu Goji Etoh; Kohsei Takehara; Sachio Oki; Yasuhide Takano; Yuya Hatsuki; Sigurdur T. Thoroddsen

doi:10.1117/12.566172

17 March 2005 Air-bubble entrapment due to a drop

Nao Ootsuka, Takeharu Goji Etoh, Kohsei Takehara, Sachio Oki, Yasuhide Takano, Yuya Hatsuki, Sigurdur T. Thoroddsen

Proceedings Volume 5580, 26th International Congress on High-Speed Photography and Photonics; (2005) https://doi.org/10.1117/12.566172
Event: 26th International Congress on High-Speed Photography and Photonics, 2004, Alexandria, Virginia, United States

Abstract

In 2001, an ultra-high-speed video camera of 1,000,000 frames per second was developed in Hydraulics Laboratory of Kinki University. The image sensor of the camera was the ISIS-V2, the In-situ Storage Image Sensor-Version 2. The camera has been applied to visualization of high-speed phenomena in various fields of science and engineering. We observed entrapment phenomena of bubbles resulting from thermal spraying of metals. Thermal spraying is used to improve solid surfaces by spraying melted metal or ceramic particles to the surfaces. One of the problems relating to the thermal spraying is entrapment of air bubbles under the metal or ceramic layers covering the solid surfaces. The bubbles decrease bonding strength of the layers made by the thermal spraying. The entrapment processes were successfully visualized by application of the ultra-high-speed video camera.

Citation Download Citation

Nao Ootsuka, Takeharu Goji Etoh, Kohsei Takehara, Sachio Oki, Yasuhide Takano, Yuya Hatsuki, and Sigurdur T. Thoroddsen "Air-bubble entrapment due to a drop", Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); https://doi.org/10.1117/12.566172

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