Manufacturing Technology 2016, 16(4):804-808 | DOI: 10.21062/ujep/x.2016/a/1213-2489/MT/16/4/804

Preparation of Ni-Ti Shape Memory Alloy by Spark Plasma Sintering Method

Pavel Salvetr1, Tomáš František Kubatík2, Pavel Novák1
1 University of Chemistry and Technology, Department of Metals and Corrosion Engineering, Technicka 5, 166 28 Prague 6, Czech Republic
2 Institute of Plasma Physics ASCR, v.v.i., Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic

This paper aims to describe powder metallurgy methods of production Ni-Ti shape memory alloy - self-propagating high-temperature synthesis (SHS) and spark plasma sintering (SPS). There are compared microstructures and phase compositions of alloys produced by SHS and by a technology containing SHS, milling and SPS. At the same time there is determined the influence of the SPS sintering temperature on the structure of Ni-Ti alloy. Self-propagating high-temperature synthesis was initiated at 1100°C with process duration 20 minutes the heating rate of approx. 300 °C/min. The product is highly porous and contains undesirable Ti2Ni phase. The SPS technique allows to obtain product with low porosity. The disadvantages of SPS technique are growing amount of Ti2Ni phase and formation of other undesirable phases (Ni4Ti3 and Ni3Ti).

Keywords: powder metallurgy, reactive sintering, spark plasma sintering, Ni-Ti alloy

Published: August 1, 2016  Show citation

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Salvetr P, Kubatík TF, Novák P. Preparation of Ni-Ti Shape Memory Alloy by Spark Plasma Sintering Method. Manufacturing Technology. 2016;16(4):804-808. doi: 10.21062/ujep/x.2016/a/1213-2489/MT/16/4/804.
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