|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||Role of Powder Microstructure and Mechanical Properties on Deposition and Properties of Cold Spray Cr Coatings
||Tyler Dabney, Kyle Quillin, Hwasung Yeom, Kumar Sridharan
|On-Site Speaker (Planned)
Thin Cr coatings are being developed as oxidation-resistant barriers for zirconium-alloy fuel rods to improve safety tolerance for the current Light Water Reactor (LWR) fleet. One way to deposit these coatings is through cold spray, a solid-state deposition technique in which micron-sized particles are accelerated at supersonic velocities towards a substrate surface using a high-pressure gas. Upon impact, the particles plastically deform at high strain rates to form a coating. The microstructure of the coating is strongly dependent on the microstructure and mechanical properties of the feedstock Cr powder. We will present characterization results of Cr feedstock powders manufactured by various methods and consequently with different mechanical properties. The mechanical behavior of Cr powder particles and the resultant coatings were evaluated by small-scale mechanical testing. Finally, the structure-property relationship will be discussed with insights of how initial powder microstructure affects the deposition and mechanical behavior of cold spray Cr coatings.
||Additive Manufacturing, Nuclear Materials, Mechanical Properties