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Title

Absence of the core–rim microstructure in TixTa1 − xCyN1 − y-based cermets developed from a pre-sintered carbonitride master alloy

AuthorsChicardi, E. ; Córdoba, J.M. ; Sayagués, María Jesús ; Gotor, F.J.
KeywordsCeramic-matrix composite
Titanium carbonitride
Mechanosynthesis
Microstructure
Cermets
Issue Date2012
PublisherElsevier
CitationInternational Journal of Refractory Metals and Hard Materials 33: 38–43 (2012)
Abstract(Ti,Ta)(C,N) solid solution-based cermets with cobalt as the binder phase were synthesised by a two-step milling process. The titanium–tantalum 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)–Co intermetallic matrix. The absence of the typical core–rim microstructure was confirmed.
Description6 páginas, 7 figuras
Publisher version (URL)http://dx.doi.org/10.1016/j.ijrmhm.2012.02.005
URIhttp://hdl.handle.net/10261/77474
DOI10.1016/j.ijrmhm.2012.02.005
ISSN0263-4368
Appears in Collections:(ICMS) Artículos
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