|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Studies on the phase formation of cobalt contacted with zinc vapour
||Melanie Leitner, Eva Gerold, Stefan Luidold, Christoph Czettl, Christian Storf
|On-Site Speaker (Planned)
The main components of cemented carbides are cobalt and tungsten carbide, with cobalt being the binder metal and tungsten carbide the hard phase. To process these materials and recover their recyclable components the zinc process is used. In the first step, hard metals react with zinc at 900–1000 °C and form intermetallic Co-Zn phases. This leads to a volume expansion, resulting in a destruction of the bond between cobalt and tungsten carbide. Investigations with liquid zinc have been carried out, but due to the better kinetics and, according to the literature, higher decomposition rate, this research focuses on gaseous zinc. To gain profound knowledge these investigations work with a simplified system of the main components in the recycling process. Pure cobalt reacts with vaporous zinc under variation of different process parameters. This study focuses on the formation of intermetallic phases of Co-Zn diffusion couples.
||Other, Other, Other