%0 PDF %T Measuring the Thermophysical Properties of Fe-Co alloys using Containerless Electrostatic Levitation Techniques. %A Choufani, Paul. %8 2017-04-19 %R http://localhost/files/x059ck99r %X Abstract: Molten FeCo alloys were processed using electrostatic levitation at the NASA Marshall Space Flight Center in order to evaluate thermophysical properties of the melt in support of industrial fluid flow modeling efforts for the casting industry. Digital image analysis of the spherical sample profile is used to track volume as a function of temperature for density measurements. The oscillating drop technique is used for measuring viscosity and surface tension. The goal of this work is to evaluate error associated with conducting measurements during cooling as compared to conducting the measurements at constant temperature. Density measurements were found to be significantly influenced by mass evaporation during the test and a new method of tracking composition changes is proposed. Surface tension measurements were independent of temperature and differences in processing mode with values between 1.70 and 1.79 N/m. In contrast, isothermal viscosities exhibited the expected Arrhenius relationship with temperature while the thermotransient viscosities varied significantly from these values and did not follow anticipated trends.; Thesis (M.S.)--Tufts University, 2012.; Submitted to the Dept. of Mechanical Engineering.; Advisor: Douglas Matson.; Committee: Douglas Matson, Luisa Chiesa, and Richard Bradshaw.; Keywords: Mechanical engineering, and Materials Science. %[ 2022-10-12 %9 Text %~ Tufts Digital Library %W Institution