| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
Interfaces, Grain Boundaries and Surfaces from Atomistic and Macroscopic Approaches -- Fundamental and Engineering Issues
|
| Presentation Title |
Surface Tension of Cerium Using the Electrostatic Levitation Process – The Effect of Oxygen |
| Author(s) |
Erik M Lord, David L. Olson, Stephen Liu |
| On-Site Speaker (Planned) |
Erik M Lord |
| Abstract Scope |
Accurate values of thermophysical properties such as surface tension are important for a fundamental understanding of materials behavior and for modeling and processing efforts. For pure metals, surface tension measurements are complicated by impurities in the bulk sample and reactions with elements in its environment. Modern non-contact techniques, such as Electrostatic Levitation (ESL), minimize reaction of samples with potential contaminants thereby providing more accurate data. The surface tension of cerium was measured using ESL for varying levels of oxygen in the bulk samples. Additionally, measurements were collected at a constant bulk oxygen concentration while varying the surrounding vacuum pressure. The results demonstrate the strong effect of both bulk oxygen and vacuum pressure on the collected surface tension values. The measured surface tension of cerium was found to be much higher than values reported in previous literature by using very oxygen-free samples and taking measurements after sufficient time at temperature. |
| Proceedings Inclusion? |
Definite: A CD-only volume |