|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Integrative Materials Design III: Performance and Sustainability
||A New Methodology for Design of Cermets: ‘Green’ Replacement for Cobalt Binder in WC
||Heather Murdoch, Kristopher Darling
|On-Site Speaker (Planned)
Cobalt has been the binder of choice for WC cermets due to its wettability, carbon processing window, and solubility. However, it has been identified as both a carcinogen and a strategic material. Research on alternative binder replacements has been ongoing; traditional modeling of carbide/binder systems has focused on the thermodynamic considerations of deleterious carbide phase formation. However, even using CALPHAD based model programs with robust databases, exploring the alloy designs space is a tedious endeavor. In addition to being computationally intensive, purely phase diagram based calculations neglect some of the other criteria necessary for liquid phase sintering of cermets, namely wetting, viscosity, and liquid infiltration. The models and material data required to calculate these criteria for liquid metal alloys provide a rapid screening process that here is used to identify select iron based alternatives to WC/cobalt cermets, but can be applied to find novel binder alloys in any cermet system.
||Planned: Supplemental Proceedings volume