RT Journal Article
SR Electronic
A1 Novák, Pavel
A1 Marek, Ivo
A1 Dvořák, Petr
A1 Veselý, Tomáš
A1 Vojtěch, Vladimír
A1 Školáková, Andrea
A1 Bernatiková, Adriana
T1 Effect of Nickel Particle Size on Eactive Sintering Production of Niti Shape Memory Alloy
JF Manufacturing Technology Journal
YR 2016
VO 16
IS 4
SP 754
OP 757
DO 10.21062/ujep/x.2016/a/1213-2489/MT/16/4/754
UL https://journalmt.com/artkey/mft-201604-0018.php
AB This work is focused on the description of the influence of the particle size of nickel on the synthesis of NiTi shape memory alloy by reactive sintering with high heating rate (300 °C.min-1). It was found that coarse nickel powders undergo only a limited thermally-activated reaction. On the other hand, too fine powders support the low-temperature (500-800 °C) diffusional formation of Ni-Ti intermetallics which could then suppress the rapid thermally-activated reaction. The optimum powder fraction of nickel to obtain the material with the lowest porosity and fraction of undesirable Ti2Ni phase is 25-45 μm.