|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Modeling and Characterization of Reflection, Absorption, and Scattering in Polycrystalline Materials
||Meir Shachar, Gottlieb Uahengo, Elias Penilla, Matthew Duarte, Yasuhiro Kodera, Javier Garay
|On-Site Speaker (Planned)
Explaining in-line transmission data from polycrystalline transparent ceramics is challenging because reflection, absorption, and scattering losses occur simultaneously. Ideally, reflection losses reveal information about the material’s surface and average refractive index, absorption losses reveal the material’s energy levels, and scattering losses reveal the material’s microstructure. However, interpretation of transmission data is obscured by the inability to differentiate between the types of losses. Two methods are explored for decoupling reflection, scattering, and absorption in materials that have all three loss types. The first method is a least-squares fitting approach which models transmission losses. The second method is a characterization technique which uses angle-dependent transmission to measure scattering and reflection losses. The advantages and limitations of these methods are explored. Both methods are applied to measured spectroscopy data on multiple material systems (ruby, zirconia, terbia, etc.) and their extracted absorption cross-sections are shown.