|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Powder Materials Processing and Fundamental Understanding
||Surface Modification of Micro Powders Using Plasma-based Reactors for Sintering of Copper-Chromium Alloys
||Santiago Vargas, Diana Shirley Galeano, Carlos Eduardo Castano
|On-Site Speaker (Planned)
Surface modification of powders to form core/shell metal structures can drive new materials and structures for advanced sintering-based manufacturing of alloys not commercially available yet. In this work, copper powder was used as a core and modified by adding chromium shells using a custom-made magnetron sputtering DC and high power impulse magnetron sputtering system. Subsequently, the powders were sintered using various classical and advanced sintering approaches to understand the main sintering mechanisms and interfacial reactions. The conventional approach of mixed copper and chromium powders was used to contrast the resulting properties and microstructures. Both magnetron sputtering variants had a strong influence on the copper-chromium interface and chromium film structure. The activation energy during the sintering processes was influenced due to the atomic structure and diffusion phenomena occurring at the core-shell interface. Extensive surface characterization was performed to assess materials characteristics of powders after modifications and components after sintering.
||Powder Materials, Surface Modification and Coatings, Copper / Nickel / Cobalt