|About this Abstract
|2020 TMS Annual Meeting & Exhibition
|Coatings and Surface Engineering for Environmental Protection II
|Oxidation Behavior of Cold Spray Chromium Coatings on Zircaloy-4 in Steam Environments in 1100 °C to 1300 °C Temperature Range
|Hwasung Yeom, Benjamin Maier, Greg Johnson, Tyler Dabney, Mia Lenling, Kumar Sridharan
|On-Site Speaker (Planned)
The oxidation kinetics and microstructural evolution of Cr coating deposited on Zircaloy-4 using the powder-based cold spray process in temperature range of 1100 °C to 1300 °C are discussed. Tests were conducted in flowing steam at atmospheric pressure. The study aims understanding the oxidation behavior of these coatings under conditions pertinent to Design Basis Accidents and Beyond Design Basis Accidents in Light Water Reactors. Evolution of surface morphology, microstructure, and phases of the coated samples were characterized using scanning electron microscopy, x-ray diffraction, and transmission electron microscopy. The growth kinetics of Cr-oxide layers on the surface of the Cr coating and Cr/Zr interdiffusion layers at the coating/substrate interface were quantified. Nano-indentation tests were performed across coating/substrate interface to assess mechanical property changes after the high temperature exposure. It is expected the results could feed data to LWR system codes for better prediction of coping time in the event of accidents.
|Planned: Supplemental Proceedings volume