|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Powder Materials for Energy Applications
||Influence of Powder Microstructure on Cold Spray Deposited Cr Coatings for High Temperature Oxidation Resistance
||Tyler Dabney, Hwasung Yeom, Greg Johnson, Ben Maier, Mia Lenling, Kumar Sridharan
|On-Site Speaker (Planned)
The cold spray deposition process is being developed to deposit oxidation resistant coatings onto Zr-alloy fuel cladding to improve accident tolerance under high temperature accident scenarios. By virtue of the solid-state cold spray process, microstructure and morphology of the feedstock powder are important factors that determine deposition efficiency and the properties of the subsequent coating. Optimization of the powder is necessary to ensure high deposition efficiency and a dense coating. In this work, cold spray was used to deposit Cr coatings onto Zr-alloy substrates using a variety of commercially available Cr powders produced by different methods. Each powder was characterized using nanoindentation, X-ray diffraction, scanning and transmission electron microscopy techniques. The correlation between powder microstructure and subsequent coating microstructure and deposition efficiency is proposed qualitatively. Finally, results from high temperature air oxidation exposure of the coatings will be presented.
||Planned: Supplemental Proceedings volume