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Enhanced oxidation resistance of Ti(C,N)-based cermets containing Ta

AuthorsChicardi, E. ; Gotor, F.J. ; Córdoba, J.M.
KeywordsCeramic matrix composite
Mechanical milling
Solid-gas reaction
Issue Date2014
PublisherPergamon Press
CitationCorrosion Science 84: 11- 20 (2014)
Abstract(TixTa1-x)(C0.5N0.5)-Co-based cermets with various Ta contents (x=0, 0.01, 0.05, 0.1 and 0.2) were oxidized at 900°C for 48h in static air. A parabolic rate law, which is indicative of the formation of a protective oxide layer, was observed for all samples. The multi-layered oxide scale and the internal oxidation region that formed as the oxidation progressed toward the interior of the cermet specimens were characterized using XRD, SEM and EDS. The enhanced oxidation resistance achieved in cermets composed by a hard component with stoichiometry Ti0.95Ta0.05C0.5N0.5 may satisfy the optimal requirements for many applications in the field of cutting tools. © 2014 Elsevier Ltd.
Identifiersdoi: 10.1016/j.corsci.2014.03.007
issn: 0010-938X
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