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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Refractory Metals
Presentation Title Studies on the Phase Formation of Cobalt Contacted with Zinc Vapour
Author(s) Melanie Leitner, Eva Gerold, Stefan Luidold, Christoph Czettl, Christian Storf
On-Site Speaker (Planned) Melanie Leitner
Abstract Scope 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.
Proceedings Inclusion? Planned:
Keywords Other, Other, Other


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Development of Heat-treatable Crss-Cr3Si-based Alloys: Microstructure, Oxidation, and Creep
Development of Novel Chromium-superalloys Strengthened by B2 Intermetallic Precipitates
Effect of Heating Rate and Substrate on the Oxidation Behavior of Hafnium Aluminum Diboride Thin Films
Flow Behavior and Associated Microstructures of Niobium at 1200 to 1500°C
Grain Boundary Doping as Effective Method to Improve Mechanical Properties in Ultra-fine Grained Tungsten
Grain Boundary Segregation Engineering in Technically Pure Molybdenum Examined via Three-point Bending Tests
High-throughput Engineering of Oxidation Behavior in Complex Refectory Alloys
NanoPhase Separation Sintering in Mo and Mo-W Based Systems
Nanostructured Tungsten Alloys for Nuclear Fusion
Oxidation Behavior of Mo-Si-B-Al Alloys at Elevated Temperature
Platinum-based Superalloys: Combating High Temperatures and Aggressive Environments
Realizing Sub-micron Tungsten and Tungsten Composite Microstructures via Deformable Punch Spark Plasma Sintering
Refractory High Entropy Alloys for Applications in Extreme Environments
Studies on the Phase Formation of Cobalt Contacted with Zinc Vapour
Sustainability-based Selection of Materials for Refractory High Entropy Alloys
Tensile Properties of Molybdenum & ODS MoLa Sheet at Elevated Temperatures
The Influence of Impurities on the Interfacial Chemistry of Niobium – Alumina High-temperature Refractories
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