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Fabrication of Thermal Plasma Sprayed NiTi Coatings Possessing Functional Properties
Article

Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method

1
Department of Functional Materials, FZU-Institute of Physics of the Czech Academy of Sciences, Na Slovance 1992/2, 182 21 Prague, Czech Republic
2
Central Laboratories, University of Chemistry and Technology, Prague (UCT Prague), 166 28 Prague, Czech Republic
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Joint Laboratory of Optics of Palacký University and Institute of Physics AS CR, Faculty of Science, Palacký University in Olomouc, 17 Listopadu 50a, 772 07 Olomouc, Czech Republic
4
Joint Laboratory of Optics of Palacky University and Institute of Physics AS CR, Institute of Physics of the Czech Academy of Sciences, 17 Listopadu 50a, 772 07 Olomouc, Czech Republic
*
Authors to whom correspondence should be addressed.
Academic Editor: Salvatore Grasso
Coatings 2021, 11(10), 1246; https://doi.org/10.3390/coatings11101246
Received: 10 September 2021 / Revised: 29 September 2021 / Accepted: 9 October 2021 / Published: 14 October 2021
The tribological behaviors of NiTi alloy produced by the spark plasma sintering (SPS) method before and after annealing were investigated at various loading conditions via indentation, scratch, and wear tests. Indentation tests were performed by a pyramidal Berkovich indenter, while scratch and wear tests were carried out by a diamond Rockwell spherical indenter at room temperature. The annealing of the as-prepared samples was performed at 350, 450, and 550 °C in the ambient atmosphere. The influence of the annealing temperature on the sample behavior towards tribological study was investigated here. The results indicated that the alloy annealed at 350 °C showed a higher hardness compared to the other annealed alloys. The scratch and wear resistance of the annealed sample at 350 °C showed a better performance in comparison to the other samples under a constant load. The high wear resistance of the annealed NiTi alloy may be attributed to its metastable R-phase. The detection and evaluation of acoustic emissions during the nano/micro-tribomechanical testing proved to be a very effective way for the exploration of the durability of SPS NiTi alloys. View Full-Text
Keywords: NiTi alloy; annealing; indentation; wear; scratch test NiTi alloy; annealing; indentation; wear; scratch test
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MDPI and ACS Style

Samal, S.; Cibulková, J.; Čtvrtlík, R.; Tomáštík, J.; Václavek, L.; Kopeček, J.; Šittner, P. Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method. Coatings 2021, 11, 1246. https://doi.org/10.3390/coatings11101246

AMA Style

Samal S, Cibulková J, Čtvrtlík R, Tomáštík J, Václavek L, Kopeček J, Šittner P. Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method. Coatings. 2021; 11(10):1246. https://doi.org/10.3390/coatings11101246

Chicago/Turabian Style

Samal, Sneha, Jana Cibulková, Radim Čtvrtlík, Jan Tomáštík, Lukáš Václavek, Jaromír Kopeček, and Petr Šittner. 2021. "Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method" Coatings 11, no. 10: 1246. https://doi.org/10.3390/coatings11101246

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