|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||Thermal Desorption Spectroscopy of High Fluence Irradiated Ultrafine and Nanocrystalline Tungsten: Helium Trapping and Desorption Correlated with Morphology
||Osman El-Atwani, Chase Taylor, James Frishkoff, Mitra L Taheri
|On-Site Speaker (Planned)
Ultrafine and nanocrystalline tungsten is considered a high radiation tolerant material due to the increase in grain boundary area. Grain boundaries act as particle (eg. Helium) and defect sinks and presumably, can reduce void and defect formation in the matrix, the concurrent changes in the microstructure and particle desorption. In this work, thermal desorption spectroscopy measurements (TDS) are made on two different types of ultrafine and nanocrystalline tungsten materials after helium irradiation. The irradiation was performed for different fluences at low (RT) and high (550 °C) temperatures. Helium desorption is discussed based on the TDS desorption graphs and the post characterized microstructures. The results are compared to commercial coarse grained tungsten. The results are also discussed based on in-situ transmission electron microscopy (TEM)/ irradiation study performed on similar samples. The outcome of the study is of vital importance to the scientific community working on nuclear materials and grain boundary engineering.
||Planned: A print-only volume