Effect of alloying elements on the reactive sintering behaviour of NiTi alloy

0474070 - FZÚ 2018 RIV CH eng C - Conference Paper (international conference)
Novák, P. - Salvetr, P. - Školáková, A. - Karlík, M. - Kopeček, Jaromír
Effect of alloying elements on the reactive sintering behaviour of NiTi alloy.
Materials Science Forum. Vol. 891. Zürich: Trans Tech Publications Ltd, 2017 - (Hornak, P.; Longauerova, M.; Zubko, P.), s. 447-451. ISBN 9783035710182. ISSN 0255-5476.
[International Symposium on Metallography and Materials Science /16./. Stará Lesná (SK), 20.04.2016-22.04.2016]
R&D Projects: GA ČR(CZ) GA14-03044S
Institutional support: RVO:68378271
Keywords : NiTi alloy * shape memory * powder metallurgy * reactive sintering
OECD category: Materials engineering

NiTi alloy is usually prepared by casting and forming. As an innovative process, reactive sintering powder metallurgy is tested worldwide, aiming to prepare pure NiTi alloy easily from nickel and titanium powders. This process enables to prepare both porous and low-porosity alloy, depending on the process conditions. However, the formation of NiTi phase in this process is always accompanied by the Ti2Ni phase, which is hard, brittle, less corrosion resistant and does not have the shape memory. In this work, various alloying elements (Al, Si, Mg, Fe, Nb, V) were added to Ni-Ti alloy in order to lower the amount of Ti2Ni phase or at least to minimize its undesirable effect on the alloy properties. The reactive sintering behaviour, phase composition and mechanical properties of Ni-Ti-X alloys were described.
Permanent Link: http://hdl.handle.net/11104/0271183