Mass-Spectrometric Investigation of Outgassing of Ti ( C , N )-WC / Mo 2 C-( Ta , Nb ) CCo / Ni

Content Provider	Semantic Scholar
Author	Schwarz, Viktoria
Copyright Year	2018
Abstract	Ti(C,N)-WC/Mo2C-(Ta,Nb)C-Co/Ni cermets were subjected to an investigation of outgassing of CO and N2 upon sintering. Quantification of CO and N2 was performed by gas calibration, measurement of masses 12 u (12C), 14 u (14N) and 28 u (28CO and N2) as well as C, N, O analysis of the samples before and after sintering. Formation of CO occurs at lower temperatures than that of N2, both gases are completely evolved already at solid-state sintering conditions. Exchange of W by Mo narrows the CO and N2 evolution peaks. If pre-alloyed powders are employed in the starting formulation the amount of evolved gases is substantially reduced because part of the formation of mixed hard phases occurs already in the production process of these powders. Changing the binder composition from Co:Ni=1:1 to 2:1 and 3:1 does not change the outgassing characteristics, while different batches of nominally the same Ti(C,N) powder can have significant influence. Mass-spectrometry (MS) is a valuable technique to get insight into metallurgical reactions in cermet systems.
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Alternate Webpage(s)	https://publik.tuwien.ac.at/files/publik_272542.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article