Stephen K. Wilke   Abdulrahman Al-Rubkhi   Chihiro Koyama   Takehiko Ishikawa   Hirohisa Oda   Brian Topper   Elizabeth M. Tsekrekas   Doris Möncke   Oliver L. G. Alderman   Vrishank Menon   Jared Rafferty   Emma Clark   Alan L. Kastengren   Chris J. Benmore   Jan Ilavsky   Jörg Neuefeind   Shinji Kohara   Michael SanSoucie   Brandon Phillips   Richard Weber   
npj Microgravity 10(1) 2024年3月
Abstract
The relationships between materials processing and structure can vary between terrestrial and reduced gravity environments. As one case study, we compare the nonequilibrium melt processing of a rare-earth titanate, nominally 83TiO2<...
Jannatun Nawer   Takehiko Ishikawa   Hirohisa Oda   Chihiro Koyama   Douglas M. Matson   
Journal of Astronomy and Space Sciences 40(3) 93-100 2023年9月 [査読有り]
A study of uncertainty analysis was conducted on four key thermophysical properties of molten Platinum using a non-contacting levitation technique. More specifically, this work demonstrates a detailed reporting of the uncertainties associated with...
Jannatun Nawer   Takehiko Ishikawa   Hirohisa Oda   Hideki Saruwatari   Chihiro Koyama   Xiao Xiao   Stephan Schneider   Matthias Kolbe   Douglas M. Matson   
npj Microgravity 9(1) 2023年5月 [査読有り]
Abstract
A new method for quantifying facility performance has been discussed in this study that encompasses uncertainties associated with thermophysical property measurement. Four key thermophysical properties: density, volumetric thermal expans...
Emissivity data is important for the temperature measurement using pyrometer when the sample is processed without container. A spectral emissivity measurement system combined with an electrostatic levitator was developed for high temperature melts...
In the gravity field on the earth, the phase separation with different density phases is affected by the gravitational force. Especially phase separation from fluids, for example, nucleation, solidification, and liquid-liquid or liquid-gas phase s...