2 research outputs found
Absence of the coreârim microstructure in TixTa1 â xCyN1 â y-based cermets developed from a pre-sintered carbonitride master alloy
(Ti,Ta)(C,N) solid solution-based cermets with cobalt as the binder phase were synthesised by a two-step milling process. The titaniumâtantalum carbonitride solid solution (the ceramic phase) was obtained via a mechanically induced self-sustaining reaction (MSR) process from stoichiometric elemental Ti, Ta, and graphite powder blends in a nitrogen atmosphere. Elemental Co (the binder phase) was added to the ceramic phase, and the mixture was homogenised by mechanical milling (MM). The powdered cermet was then sintered in a tubular furnace at temperatures ranging from 1400 °C to 1600 °C in an inert atmosphere. The chemical composition and microstructure of the sintered cermets were characterised as ceramic particles grown via a coalescence process and embedded in a complex (Ti,Ta)âCo intermetallic matrix. The absence of the typical coreârim microstructure was confirmed.Gobierno de España MAT2010â1704
Absence of the coreârim microstructure in TixTa1 â xCyN1 â y-based cermets developed from a pre-sintered carbonitride master alloy
6 pĂĄginas, 7 figuras(Ti,Ta)(C,N) solid solution-based cermets with cobalt as the binder phase were synthesised by a two-step milling process. The titaniumâtantalum carbonitride solid solution (the ceramic phase) was obtained via a mechanically induced self-sustaining reaction (MSR) process from stoichiometric elemental Ti, Ta, and graphite powder blends in a nitrogen atmosphere. Elemental Co (the binder phase) was added to the ceramic phase, and the mixture was homogenised by mechanical milling (MM). The powdered cermet was then sintered in a tubular furnace at temperatures ranging from 1400 °C to 1600 °C in an inert atmosphere. The chemical composition and microstructure of the sintered cermets were characterised as ceramic particles grown via a coalescence process and embedded in a complex (Ti,Ta)âCo intermetallic matrix. The absence of the typical coreârim microstructure was confirmed.This work was supported by the Spanish Government under grant no. MAT2010-17046, which was financed in part by the European Regional Development Fund of 2007â2013. E. Chicardi and J. M. CĂłrdoba were supported by the CSIC through JAE-Pre and JAE-Doc grants, respectively, which are financed in part by the European Social Fund (ESF).Peer reviewe