from the conferences organized by TANGER Ltd. provisional website
Ni-45Ti-5Zr (at%) alloy was prepared by two different methods – by plasma and vacuum induction melting. Two samples were cut out both the ingots – the first out the edge and the second out the centre of the ingots. The aim was to confirm homogeneity of the ingots. Metalographical sections were used for photodocumenting of a microstructure, for verifying of chemical composition with EDS analysis and for statistic description of phases. Moreover, both the ingots were used for determination of C and O contents. In the both cases, structure was polycrystaline with a significant Zr segregation along dendrite boundaries. Chemical composition for the centre and the edge of the ingots was different only for the ingot prepared by plasma metallurgy. Unfortunately, both the ingots were contaminated with higher C and O contents.Keywords: NiTiZr-based alloys, microstructure, plasma metallurgy, vacuum induction melting, purity
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