Japan Space Utilization Promotion Center
Japan Space Utilization Promotion Center
Advance Engineering Service Co Ltd
Advance Engineering Service Co Ltd
Advance Engineering Service Co Ltd
National Space Development Agency of Japan
National Space Development Agency of Japan
National Space Development Agency of Japan
出版者
宇宙開発事業団
出版者（英）
National Space Development Agency of Japan (NASDA)
The wettability between molten metals and base plates (crucible materials) was evaluated under microgravity using MU-300. The compatibility between sample and crucible is very important, why it was caused to failure in the previous space experiments. So NASDA has developed the apparatus of wettability measurement and has been planning its data acquisition for database. In this experiment, the wettability between the metal samples: gallium (Ga), antimony (Sb), silver (Ag), and the disks: silica, boron nitride (BN), graphite, was evaluated using pushing-out droplet method in the several temperature, under microgravity and 1g environment. The image data were acquired and treated, then the contact angles were analyzed by curve fitting method of Laplace equation. The results are as follows: (1) for the silica disk, the contact angle increases in the order of Sb, Ag, and Ga; (2) for Ga sample, the wettability to disk decreases in the order of silica, BN, and graphite; and (3) the effect of temperature on contact angles under microgravity and 1g is less than that of disk and metal materials.
微小重力下での金属融体の濡れ性評価 その1
00788001.pdf
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